932 lines
41 KiB
HTML
932 lines
41 KiB
HTML
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<html lang="en">
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<title>GigaBIT M1 — Critical Design Review</title>
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<body>
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<div class="reveal">
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<div class="slides">
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<!-- ===== TITLE ===== -->
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<section class="title-slide" data-background-class="dark-hero-bg" data-background-gradient="radial-gradient(900px 500px at 30% 20%, rgba(125,211,252,0.12), transparent 55%), radial-gradient(600px 400px at 80% 70%, rgba(167,139,250,0.10), transparent 60%), linear-gradient(135deg, #070a0f 0%, #0e1420 100%)">
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<h1 style="color:var(--fg);">GigaBIT M1 Primary Mirror</h1>
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<div class="subtitle" style="color:var(--cyan);">Critical Design Review</div>
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<hr style="border:none; height:2px; background:rgba(232,238,247,0.12); width:40%; margin:0.6em auto;">
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<div class="meta" style="color:var(--muted);">
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<p>Optiques Fullum & Atomaste Solution</p>
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<p>January 2026</p>
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<p style="margin-top:1em; font-size:0.85em;">Presented to StarSpec</p>
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</div>
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</section>
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<!-- ===== AGENDA ===== -->
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<section>
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<h2>Agenda</h2>
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<div style="text-align:left; max-width:600px; margin:0 auto;">
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<ol style="font-size:0.75em; line-height:2;">
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<li>CDR Objectives & Scope</li>
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<li>M1 Design Overview</li>
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<li>Support System Architecture</li>
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<li>Optimization & Cost Reduction Campaign</li>
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<li>Selected Design — Option B Performance</li>
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<li>Recent Development: Refined Contact Model</li>
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<li>Boundary Condition Strategy</li>
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<li>Reference Frame — Scope & Requirements</li>
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<li>Risk Assessment</li>
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<li>Path Forward & Recommendation</li>
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</ol>
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</div>
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</section>
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<!-- ===== CDR OBJECTIVES ===== -->
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<section>
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<h2>CDR Objectives</h2>
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<div class="highlight-box">
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<p style="font-size:0.8em; font-weight:600;">Goal: Establish design maturity sufficient to authorize blank procurement from Schott.</p>
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</div>
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<br>
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<div style="text-align:left; max-width:650px; margin:0 auto;">
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<ol style="font-size:0.68em; line-height:1.8;">
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<li class="fragment fade-up">Validate M1 design meets optical & mechanical requirements</li>
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<li class="fragment fade-up">Document cost reduction campaign & trade-off analysis</li>
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<li class="fragment fade-up">Present final design selection with supporting data</li>
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<li class="fragment fade-up">Define support system architecture & reference frame concept</li>
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<li class="fragment fade-up">Establish procurement path & timeline</li>
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</ol>
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</div>
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<br>
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<p style="font-size:0.6em; color:var(--muted);">Scope: M1 blank design + support system architecture.<br>
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Reference frame detailed design & STOP analysis → FDR phase.</p>
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</section>
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<!-- ===== M1 DESIGN OVERVIEW ===== -->
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<section>
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<h2>M1 Mirror Blank — Design Overview</h2>
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<div class="two-col">
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<div>
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<img src="./assets/components/M1-Blank/hero.png" class="slide-img" alt="M1 Blank">
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<div class="caption">M1 blank — lightweighted back face with honeycomb rib structure</div>
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</div>
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<div style="text-align:left;">
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<h3>Optical Prescription</h3>
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<table>
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<tr><td><b>Surface</b></td><td>Near-parabolic (k = −0.9886)</td></tr>
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<tr><td><b>Radius of curvature</b></td><td>2893.6 mm ± 3 mm</td></tr>
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<tr><td><b>Clear aperture</b></td><td>1202 mm</td></tr>
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<tr><td><b>Material</b></td><td>ZERODUR Class 0</td></tr>
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</table>
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<h3 style="margin-top:0.6em;">Option B Geometry</h3>
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<table>
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<tr><td><b>Back face angle</b></td><td>4.01°</td></tr>
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<tr><td><b>Center thickness</b></td><td>85 mm</td></tr>
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<tr><td><b>Mass</b></td><td>95.81 kg</td></tr>
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<tr><td><b>Support bosses</b></td><td>54 (30 mm Ø)</td></tr>
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</table>
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</div>
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</div>
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</section>
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<!-- ===== M1 WITH SUPPORT ===== -->
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<section>
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<h2>M1 Assembly</h2>
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<div class="two-col">
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<div>
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<img src="./assets/components/M1-Blank/with-vertical-iso.png" class="small-img" alt="M1 with vertical support">
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<div class="caption">M1 with 54-point whiffletree support</div>
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</div>
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<div>
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<img src="./assets/components/Full-Assembly/isometric.png" class="small-img" alt="Full assembly">
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<div class="caption">Full M1 assembly — blank + supports + reference frame</div>
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</div>
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</div>
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</section>
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<!-- ===== SUPPORT SYSTEM ===== -->
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<section>
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<h2>Support System Architecture</h2>
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<div class="two-col">
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<div style="text-align:left;">
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<h3>Vertical Support — 54-Point Whiffletree</h3>
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<ul style="font-size:0.65em;">
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<li class="fragment fade-up">3-stage hierarchy (18 contact points × 3)</li>
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<li class="fragment fade-up">Carbon fiber plates for thermal isolation</li>
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<li>RDOF joints: 150 Nm·m stiffness (negligible WFE impact)</li>
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<li>Spherical joints for self-alignment</li>
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</ul>
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<h3 style="margin-top:0.6em;">Lateral Support — 3-Point System</h3>
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<ul style="font-size:0.65em;">
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<li class="fragment fade-up">Roll restraint ±7.5°</li>
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<li class="fragment fade-up">Low-friction sliding interface (Teflon-like)</li>
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<li>Minimizes parasitic frame distortion transfer</li>
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<li>Parameterized pivot positions (inner/outer/middle)</li>
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</ul>
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</div>
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<div>
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<img src="./assets/components/Vertical-Support/isometric.png" class="small-img" alt="Vertical support isometric">
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<div class="caption">Vertical support — whiffletree isometric view</div>
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<br>
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<img src="./assets/components/Lateral-Support/detail.png" class="thumb" alt="Lateral support">
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<div class="caption">Lateral support detail</div>
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</div>
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</div>
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</section>
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<!-- ===== SUPPORT SYSTEM DETAILS ===== -->
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<section>
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<h2>Support System — Detail Views</h2>
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<div class="three-col">
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<div>
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<img src="./assets/components/Vertical-Support/stage-1.png" class="thumb" alt="Stage 1">
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<div class="caption">Stage 1 — Pads</div>
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</div>
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<div>
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<img src="./assets/components/Vertical-Support/stage-2.png" class="thumb" alt="Stage 2">
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<div class="caption">Stage 2 — Intermediate lever</div>
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</div>
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<div>
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<img src="./assets/components/Vertical-Support/stage-3.png" class="thumb" alt="Stage 3">
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<div class="caption">Stage 3 — Frame interface arm</div>
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||
</div>
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</div>
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<br>
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<div class="two-col">
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||
<div>
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||
<img src="./assets/components/Vertical-Support/spherical-joint.png" class="thumb" alt="Spherical joint">
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<div class="caption">Spherical joint — self-alignment</div>
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||
</div>
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||
<div>
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||
<img src="./assets/components/Stage-3-Arm/detail.png" class="thumb" alt="Stage 3 arm">
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||
<div class="caption">Stage 3 arm — connection detail</div>
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||
</div>
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||
</div>
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||
</section>
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||
|
||
<!-- ===== REFERENCE FRAME ===== -->
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<section>
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<h2>Reference Frame — Concept</h2>
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||
<div class="two-col">
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||
<div>
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||
<img src="./assets/components/Reference-Frame/hero.png" class="small-img" alt="Reference frame">
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||
<div class="caption">CFRP reference frame concept</div>
|
||
</div>
|
||
<div>
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||
<img src="./assets/components/Reference-Frame/top.png" class="small-img" alt="Reference frame top">
|
||
<div class="caption">Top view — interface point layout</div>
|
||
</div>
|
||
</div>
|
||
<br>
|
||
<div class="highlight-box">
|
||
<p style="font-size:0.65em;">Conceptual design provided by Optiques Fullum as a <b>good-faith proposal</b> to facilitate integration. Detailed design & manufacturing = StarSpec responsibility.</p>
|
||
</div>
|
||
</section>
|
||
|
||
<!-- ===== OPTIMIZATION CAMPAIGN ===== -->
|
||
<section>
|
||
<h2>Optimization Campaign — Scale</h2>
|
||
<div class="metric-row">
|
||
<div class="metric-card blue fragment fade-up"><div class="value">3,770+</div><div class="label">FEA Simulations</div></div>
|
||
<div class="metric-card fragment fade-up"><div class="value">14</div><div class="label">Design Variables</div></div>
|
||
<div class="metric-card fragment fade-up"><div class="value">5</div><div class="label">Algorithms Tested</div></div>
|
||
<div class="metric-card green fragment fade-up"><div class="value">Confirmed</div><div class="label">Convergence</div></div>
|
||
</div>
|
||
<br>
|
||
<table>
|
||
<thead>
|
||
<tr><th>Campaign</th><th>FEA Trials</th><th>Algorithms</th><th>Focus</th></tr>
|
||
</thead>
|
||
<tbody>
|
||
<tr><td>Adaptive Support</td><td>~1,400</td><td>GNN+TuRBO, TPE, NSGA-II</td><td>Support position optimization</td></tr>
|
||
<tr><td>Cost Reduction</td><td>~900</td><td>TPE, CMA-ES</td><td>Geometry simplification</td></tr>
|
||
<tr><td>Flat Back Exploration</td><td>1,470</td><td>TPE, SAT v3, L-BFGS</td><td>Manufacturing trade study</td></tr>
|
||
</tbody>
|
||
</table>
|
||
<br>
|
||
<div class="success-box">
|
||
<p style="font-size:0.65em;">✅ Design space thoroughly explored. Multiple algorithms converge to same solution.</p>
|
||
</div>
|
||
</section>
|
||
|
||
<!-- ===== ATOMIZER FRAMEWORK ===== -->
|
||
<section>
|
||
<h2>Atomizer — Custom Optimization Framework</h2>
|
||
<div style="text-align:left; max-width:650px; margin:0 auto;">
|
||
<h3>Evolution since PDR</h3>
|
||
<ul style="font-size:0.65em;">
|
||
<li class="fragment fade-up">Transitioned from HEEDS MDO → <b>Atomizer</b> (fully custom)</li>
|
||
<li>Full control over algorithm selection & tuning</li>
|
||
<li class="fragment fade-up"><b>OPD-based Zernike extraction</b> — accounts for lateral (X,Y) displacement, not just axial (Z)</li>
|
||
<li>Complete traceability through version-controlled studies</li>
|
||
</ul>
|
||
<h3 style="margin-top:0.6em;">Key Algorithms</h3>
|
||
<ul style="font-size:0.65em;">
|
||
<li><b>TPE</b> — Bayesian optimization baseline</li>
|
||
<li><b>GNN Surrogate</b> — Graph Neural Network (~0.95 R² on Zernike coefficients)</li>
|
||
<li class="fragment fade-up"><b>SAT v3</b> — Self-Aware TuRBO with adaptive exploration schedule
|
||
<ul><li>15% explore → 8% → 3% (matches human expert behavior)</li></ul>
|
||
</li>
|
||
<li><b>L-BFGS</b> — Gradient-based polish for final refinement</li>
|
||
</ul>
|
||
</div>
|
||
</section>
|
||
|
||
<!-- ===== COST REDUCTION ===== -->
|
||
<section>
|
||
<h2>Cost Reduction Campaign</h2>
|
||
<div class="highlight-box">
|
||
<p style="font-size:0.7em;"><b>Problem:</b> Schott quote $625K vs. $523K budget → $102K gap to close</p>
|
||
</div>
|
||
<br>
|
||
<div class="two-col">
|
||
<div style="text-align:left;">
|
||
<h3>Strategy 1: Geometry Simplifications</h3>
|
||
<table>
|
||
<tr><th>Modification</th><th>Impact</th><th>Verdict</th></tr>
|
||
<tr><td>Remove structural ribs</td><td>+92% WFE</td><td style="color:var(--red);">✗ Rejected</td></tr>
|
||
<tr><td>Support cone → 0°</td><td>+3.3%</td><td style="color:var(--green);">✓ Acceptable</td></tr>
|
||
<tr><td>Remove center mini ribs</td><td><b>−1.6%</b></td><td style="color:var(--green);">✓ Recommended</td></tr>
|
||
<tr><td>Center thickness 85→80</td><td>+8.2%</td><td style="color:var(--red);">✗ Rejected</td></tr>
|
||
</table>
|
||
</div>
|
||
<div style="text-align:left;">
|
||
<h3>Strategy 2: Flat Back Variant</h3>
|
||
<ul style="font-size:0.65em;">
|
||
<li>Eliminates taper machining entirely</li>
|
||
<li>No jig required</li>
|
||
<li class="fragment fade-up">1,470 FEA trials across 10 versions</li>
|
||
<li class="fragment fade-up">49% improvement in MFG deformation</li>
|
||
<li>Mass trade-off: +16 kg</li>
|
||
</ul>
|
||
</div>
|
||
</div>
|
||
<br>
|
||
<div class="success-box">
|
||
<p style="font-size:0.65em;">✅ Campaign closed the cost gap. Option B: $525K (+0.4% of budget). Option C: $520K.</p>
|
||
</div>
|
||
</section>
|
||
|
||
<!-- ===== KEY FINDING ===== -->
|
||
<section>
|
||
<h2>Key Finding — Structural Ribs Are Non-Negotiable</h2>
|
||
<div style="text-align:left; max-width:650px; margin:0 auto;">
|
||
<p style="font-size:0.72em;">The sensitivity analysis revealed a <b>critical design hierarchy</b>:</p>
|
||
<table>
|
||
<thead><tr><th>Rank</th><th>Parameter</th><th>Sensitivity</th></tr></thead>
|
||
<tbody>
|
||
<tr><td>1</td><td>Structural Rib Topology</td><td style="color:var(--red);font-weight:700;">CRITICAL (67–92% degradation)</td></tr>
|
||
<tr><td>2</td><td>Center Thickness</td><td style="color:var(--red);font-weight:700;">CRITICAL (+106% MFG)</td></tr>
|
||
<tr><td>3</td><td>Pocket Radii</td><td style="color:var(--amber);font-weight:600;">HIGH (requires re-optimization)</td></tr>
|
||
<tr><td>4</td><td>Center Mini Ribs</td><td style="color:var(--green);font-weight:600;">POSITIVE (7–9% improvement)</td></tr>
|
||
<tr><td>5</td><td>Support Cone Angle</td><td>Low-Moderate</td></tr>
|
||
<tr><td>6</td><td>RDOF Stiffness</td><td>Negligible (<0.2%)</td></tr>
|
||
</tbody>
|
||
</table>
|
||
<br>
|
||
<div class="warn-box">
|
||
<p style="font-size:0.65em;">⚠️ The ribs provide stiffness against asymmetric gravity deflection. Removing them increases high-order aberrations (J4+) by 2.4×. This finding de-risked the design decision.</p>
|
||
</div>
|
||
</div>
|
||
</section>
|
||
|
||
<!-- ===== SELECTED DESIGN ===== -->
|
||
<section>
|
||
<h2>Selected Design — Option B (Conical V14)</h2>
|
||
<div class="metric-row">
|
||
<div class="metric-card green fragment fade-up"><div class="value">7.70 nm</div><div class="label">WFE 40° (65% margin)</div></div>
|
||
<div class="metric-card green fragment fade-up"><div class="value">17.69 nm</div><div class="label">WFE 60° (20% margin)</div></div>
|
||
<div class="metric-card fragment fade-up"><div class="value">37.06 nm</div><div class="label">MFG 90° (acceptable)</div></div>
|
||
</div>
|
||
<div class="metric-row">
|
||
<div class="metric-card green fragment fade-up"><div class="value">95.81 kg</div><div class="label">Mass (7.4% margin)</div></div>
|
||
<div class="metric-card blue fragment fade-up"><div class="value">$525K</div><div class="label">Schott Quote (+0.4%)</div></div>
|
||
<div class="metric-card fragment fade-up"><div class="value">22 nm</div><div class="label">Requirement (λ/25)</div></div>
|
||
</div>
|
||
<br>
|
||
<table>
|
||
<thead><tr><th>Factor</th><th>Option B (Selected)</th><th>Option C (Trade Study)</th></tr></thead>
|
||
<tbody>
|
||
<tr><td><b>WFE 40°</b></td><td>7.70 nm</td><td>6.43 nm</td></tr>
|
||
<tr><td><b>WFE 60°</b></td><td>17.69 nm</td><td>14.26 nm</td></tr>
|
||
<tr><td><b>Mass</b></td><td style="color:var(--green);">95.81 kg ✓</td><td>102.38 kg</td></tr>
|
||
<tr><td><b>Quote</b></td><td>$525,000</td><td>$520,000</td></tr>
|
||
<tr><td><b>Risk</b></td><td style="color:var(--green);">Lower (proven geometry)</td><td>Moderate (new variant)</td></tr>
|
||
</tbody>
|
||
</table>
|
||
</section>
|
||
|
||
<!-- ===== RECENT DEV: CONTACT MODEL ===== -->
|
||
<section>
|
||
<h2>Recent Development — Refined Lateral Contact Model</h2>
|
||
<div class="highlight-box">
|
||
<p style="font-size:0.7em;"><b>Design decision (Jan 30, 2026):</b> Changed lateral shoe-blank interface from silicone adhesive to low-friction sliding material (Teflon-like).</p>
|
||
</div>
|
||
<br>
|
||
<div class="two-col">
|
||
<div style="text-align:left;">
|
||
<h3>Why this change?</h3>
|
||
<ul style="font-size:0.65em;">
|
||
<li class="fragment fade-up"><b>Mirror independence</b> — blank floats freely within lateral supports</li>
|
||
<li class="fragment fade-up"><b>No parasitic transfer</b> — frame distortions decoupled from mirror</li>
|
||
<li class="fragment fade-up"><b>Conservative</b> — worst-case for self-support; if actual friction is higher, performance will be <i>better</i> than predicted</li>
|
||
</ul>
|
||
</div>
|
||
<div>
|
||
<table>
|
||
<thead><tr><th>Metric</th><th>Previous</th><th>Refined</th><th>Δ</th></tr></thead>
|
||
<tbody>
|
||
<tr><td><b>WFE 40°</b></td><td>6.12 nm</td><td>7.70 nm</td><td>+26%</td></tr>
|
||
<tr><td><b>WFE 60°</b></td><td>13.41 nm</td><td>17.69 nm</td><td>+32%</td></tr>
|
||
<tr><td><b>MFG 90°</b></td><td>27.01 nm</td><td>37.06 nm</td><td>+37%</td></tr>
|
||
</tbody>
|
||
</table>
|
||
</div>
|
||
</div>
|
||
<br>
|
||
<div class="success-box">
|
||
<p style="font-size:0.65em;">✅ All values remain compliant with 22 nm requirement. Higher values = more physically accurate, not design degradation.</p>
|
||
</div>
|
||
</section>
|
||
|
||
<!-- ===== WFE FIGURES ===== -->
|
||
<section>
|
||
<h2>Optical Performance — WFE Surface Maps</h2>
|
||
<div class="two-col">
|
||
<div>
|
||
<img src="./assets/plots/html2.png" class="small-img" alt="WFE 40 vs 20">
|
||
<div class="caption">WFE surface — 40° vs 20° (7.70 nm RMS)</div>
|
||
</div>
|
||
<div>
|
||
<img src="./assets/plots/html3.png" class="small-img" alt="WFE 60 vs 20">
|
||
<div class="caption">WFE surface — 60° vs 20° (17.69 nm RMS)</div>
|
||
</div>
|
||
</div>
|
||
<br>
|
||
<p style="font-size:0.6em; color:var(--muted);">Refined contact model (Jan 30, 2026). J1–J4 removed (piston, tip, tilt, defocus corrected by active optics).</p>
|
||
</section>
|
||
|
||
<!-- ===== MFG + BAR CHART ===== -->
|
||
<section>
|
||
<h2>Manufacturing & Analysis Summary</h2>
|
||
<div class="two-col">
|
||
<div>
|
||
<img src="./assets/plots/html4.png" class="small-img" alt="MFG 90">
|
||
<div class="caption">Manufacturing residual at 90° — 37.06 nm RMS</div>
|
||
</div>
|
||
<div>
|
||
<img src="./assets/plots/html1.png" class="small-img" alt="Summary bar chart">
|
||
<div class="caption">Per-angle RMS WFE bar chart (Atomizer report)</div>
|
||
</div>
|
||
</div>
|
||
</section>
|
||
|
||
<!-- ===== ZERNIKE & PSD ===== -->
|
||
<section>
|
||
<h2>Zernike Trajectory & PSD Analysis</h2>
|
||
<div class="two-col">
|
||
<div>
|
||
<img src="./assets/plots/html5.png" class="small-img" alt="Zernike trajectory">
|
||
<div class="caption">Zernike mode RMS vs. elevation — Spherical (Z11) dominates. Linear R² = 1.0000</div>
|
||
</div>
|
||
<div>
|
||
<img src="./assets/plots/html7.png" class="small-img" alt="Surface PSD">
|
||
<div class="caption">Surface PSD — gravity signature, support print-through, high-frequency bands</div>
|
||
</div>
|
||
</div>
|
||
<br>
|
||
<p style="font-size:0.6em; color:var(--muted);">PSD analysis confirms support print-through dominates (71–85% of total WFE). Predictable and well-characterized behavior.</p>
|
||
</section>
|
||
|
||
<!-- ===== ZERNIKE COEFFICIENTS ===== -->
|
||
<section>
|
||
<h2>Zernike Coefficient Breakdown</h2>
|
||
<div class="three-col">
|
||
<div>
|
||
<img src="./assets/plots/html10.png" class="thumb" alt="Zernike 40">
|
||
<div class="caption">40° vs 20° — Defocus (J04) dominant</div>
|
||
</div>
|
||
<div>
|
||
<img src="./assets/plots/html11.png" class="thumb" alt="Zernike 60">
|
||
<div class="caption">60° vs 20° — Secondary Astigmatism (J13) rises</div>
|
||
</div>
|
||
<div>
|
||
<img src="./assets/plots/html12.png" class="thumb" alt="Zernike 90">
|
||
<div class="caption">90° absolute — Spherical (J11) at 37.5 nm</div>
|
||
</div>
|
||
</div>
|
||
</section>
|
||
|
||
<!-- ===== MODAL ANALYSIS ===== -->
|
||
<section>
|
||
<h2>Modal Analysis — Natural Frequencies</h2>
|
||
<div class="highlight-box">
|
||
<p style="font-size:0.7em;"><b>First mode: 250.4 Hz</b> — exceeds 150 Hz requirement by 67% margin.</p>
|
||
</div>
|
||
<br>
|
||
<div class="two-col">
|
||
<div>
|
||
<table>
|
||
<thead><tr><th>Mode</th><th>Freq (Hz)</th><th>Description</th></tr></thead>
|
||
<tbody>
|
||
<tr><td>1</td><td><b>250.4</b></td><td>Trefoil bending (3-nodal dia.)</td></tr>
|
||
<tr><td>2</td><td>259.3</td><td>Astigmatic bending (2-nodal dia.)</td></tr>
|
||
<tr><td>3</td><td>466.2</td><td>Rocking/tilting</td></tr>
|
||
<tr><td>4</td><td>668.8</td><td>Higher-order bending</td></tr>
|
||
</tbody>
|
||
</table>
|
||
</div>
|
||
<div>
|
||
<img src="./assets/plots/Mode1.png" class="small-img" alt="Mode 1 shape">
|
||
<div class="caption">Mode 1 (250.4 Hz) — trefoil bending, 3-nodal diameter pattern</div>
|
||
</div>
|
||
</div>
|
||
<br>
|
||
<p style="font-size:0.6em; color:var(--muted);">SOL 103 analysis with fixed BCs at all 54 whiffletree + 3 lateral support points. All 10 modes well above 150 Hz.</p>
|
||
</section>
|
||
|
||
<!-- ===== BOUNDARY CONDITION STRATEGY ===== -->
|
||
<section>
|
||
<h2>Boundary Condition Strategy</h2>
|
||
<div style="text-align:left; max-width:680px; margin:0 auto;">
|
||
<h3>The Decoupling Approach</h3>
|
||
<p style="font-size:0.68em;">We deliberately decouple two problems that can be solved independently:</p>
|
||
<div class="highlight-box">
|
||
<p style="font-size:0.68em;"><b>Step 1:</b> Optimize blank for ideal fixed BCs → <span class="tag tag-done">Complete (CDR)</span></p>
|
||
<p style="font-size:0.68em;"><b>Step 2:</b> Engineer reference frame to approach ideal BCs → <span class="tag tag-open">In progress (FDR)</span></p>
|
||
</div>
|
||
<br>
|
||
<h3>Why this works</h3>
|
||
<ul style="font-size:0.65em;">
|
||
<li class="fragment fade-up">Reduces complexity: 14 variables vs. 60+ (blank + frame coupled)</li>
|
||
<li class="fragment fade-up">Blank procurement & frame design proceed <b>in parallel</b></li>
|
||
<li>Clear success criteria: frame stiffness targets derived from WFE sensitivity</li>
|
||
<li>Standard practice in large telescope projects (TMT, GMT, E-ELT)</li>
|
||
</ul>
|
||
<br>
|
||
<h3>The self-maintaining structure</h3>
|
||
<p style="font-size:0.65em;">The optimized blank is not merely "shaped to fit the supports." It is a <b>self-maintaining structure</b> — ribs are aligned with gravity load paths, mass is placed where stiffness is needed. Even with moderate support compliance, the blank's inherent structural efficiency limits WFE growth.</p>
|
||
</div>
|
||
</section>
|
||
|
||
<!-- ===== REFERENCE FRAME SCOPE ===== -->
|
||
<section>
|
||
<h2>Reference Frame — Scope & Requirements</h2>
|
||
<div class="two-col">
|
||
<div style="text-align:left;">
|
||
<h3>Scope Boundary</h3>
|
||
<table>
|
||
<tr><th>Deliverable</th><th>Owner</th><th>Status</th></tr>
|
||
<tr><td>M1 Blank (Zerodur)</td><td>Optiques Fullum</td><td><span class="tag tag-done">CDR ✓</span></td></tr>
|
||
<tr><td>Vertical Support (54-pt)</td><td>Optiques Fullum</td><td><span class="tag tag-done">CDR ✓</span></td></tr>
|
||
<tr><td>Lateral Support (3-pt)</td><td>Optiques Fullum</td><td><span class="tag tag-done">CDR ✓</span></td></tr>
|
||
<tr><td>Reference Frame</td><td>StarSpec</td><td><span class="tag tag-new">Concept proposed</span></td></tr>
|
||
</table>
|
||
<br>
|
||
<h3>Frame Stiffness Targets</h3>
|
||
<table>
|
||
<tr><th>Parameter</th><th>Requirement</th></tr>
|
||
<tr><td>Support point deflection</td><td>< 1 μm</td></tr>
|
||
<tr><td>First mode (frame + mirror)</td><td>> 150 Hz</td></tr>
|
||
<tr><td>Mass (frame only)</td><td>< 20 kg</td></tr>
|
||
</table>
|
||
</div>
|
||
<div>
|
||
<img src="./assets/components/Reference-Frame/side.png" class="small-img" alt="Reference frame side">
|
||
<div class="caption">Reference frame — side view</div>
|
||
<br>
|
||
<div class="warn-box">
|
||
<p style="font-size:0.6em;">⚠️ <b>CDR Open Item:</b> ΔWFE vs. stiffness sweep not yet executed. Method is defined; execution is the highest-priority post-CDR task.</p>
|
||
</div>
|
||
</div>
|
||
</div>
|
||
</section>
|
||
|
||
<!-- ===== WHY ORDER NOW ===== -->
|
||
<section>
|
||
<h2>Why It's Safe to Order the Blank Now</h2>
|
||
<div style="text-align:left; max-width:680px; margin:0 auto;">
|
||
<h3>Evidence of Convergence</h3>
|
||
<table>
|
||
<tr><th>Campaign</th><th>Improvement</th><th>Trials After Plateau</th></tr>
|
||
<tr><td>Flat Back V9 → V10</td><td>+1.3% (worse)</td><td>296</td></tr>
|
||
<tr><td>Adaptive V13 → V14</td><td>−5.9% (better)</td><td>785</td></tr>
|
||
<tr><td>Adaptive V14 → V15</td><td>0% (none)</td><td>126</td></tr>
|
||
</table>
|
||
<br>
|
||
<h3>The Frame is a Solvable Problem</h3>
|
||
<ul style="font-size:0.65em;">
|
||
<li class="fragment fade-up">Known physics — CFRP structural engineering, not research</li>
|
||
<li class="fragment fade-up">Conservative stiffness target (<1 μm) with margin</li>
|
||
<li>Mitigation options exist if needed (local stiffening, shimming)</li>
|
||
<li>Frame development is <b>independent</b> of blank design</li>
|
||
</ul>
|
||
<br>
|
||
<div class="highlight-box">
|
||
<p style="font-size:0.7em;">🕐 <b>Schedule driver:</b> 18-week Schott lead time. Quote valid until <b>March 4, 2026</b>. Delaying for coupled optimization would extend program by months with uncertain benefit.</p>
|
||
</div>
|
||
</div>
|
||
</section>
|
||
|
||
<!-- ===== RISK ASSESSMENT ===== -->
|
||
<section>
|
||
<h2>Risk Assessment</h2>
|
||
<div class="two-col">
|
||
<div>
|
||
<table>
|
||
<thead><tr><th>Risk</th><th>L</th><th>I</th><th>Status</th></tr></thead>
|
||
<tbody>
|
||
<tr><td>Design convergence</td><td>1</td><td>3</td><td><span class="tag tag-done">Closed</span></td></tr>
|
||
<tr><td>Cost exceeds budget</td><td>2</td><td>2</td><td><span class="tag tag-done">Reduced</span></td></tr>
|
||
<tr><td>Schott delivery delay</td><td>2</td><td>3</td><td><span class="tag tag-open">Open</span></td></tr>
|
||
<tr><td>Frame stiffness</td><td>2</td><td>2</td><td><span class="tag tag-new">New</span></td></tr>
|
||
<tr><td>Mass exceedance</td><td>1</td><td>2</td><td><span class="tag tag-done">Closed</span></td></tr>
|
||
<tr><td>Polishing difficulty</td><td>1</td><td>3</td><td><span class="tag tag-done">Reduced</span></td></tr>
|
||
<tr><td>Interface incompatibility</td><td>2</td><td>2</td><td><span class="tag tag-open">Open</span></td></tr>
|
||
</tbody>
|
||
</table>
|
||
</div>
|
||
<div style="text-align:left;">
|
||
<h3>Trend Since PDR</h3>
|
||
<table>
|
||
<tr><th>Category</th><th>PDR</th><th>CDR</th><th></th></tr>
|
||
<tr><td>Technical</td><td>Medium</td><td style="color:var(--green);">Low-Med</td><td>↓</td></tr>
|
||
<tr><td>Schedule</td><td>Medium</td><td>Medium</td><td>→</td></tr>
|
||
<tr><td>Cost</td><td>High</td><td style="color:var(--green);">Medium</td><td>↓</td></tr>
|
||
<tr><td>Integration</td><td>Medium</td><td>Medium</td><td>→</td></tr>
|
||
</table>
|
||
<br>
|
||
<div class="success-box">
|
||
<p style="font-size:0.6em;">Technical and cost risks significantly improved since PDR. Risk posture supports procurement.</p>
|
||
</div>
|
||
</div>
|
||
</div>
|
||
</section>
|
||
|
||
<!-- ===== WHAT'S DONE / WHAT'S NEXT ===== -->
|
||
<section>
|
||
<h2>What's Done & What's Next</h2>
|
||
<div class="two-col">
|
||
<div style="text-align:left;">
|
||
<h3 style="color:var(--green);">✅ Completed at CDR</h3>
|
||
<ul style="font-size:0.65em;">
|
||
<li>Mirror blank geometry — optimized & validated</li>
|
||
<li>Support positions — optimized (14 variables)</li>
|
||
<li>Cost reduction campaign — closed $102K gap</li>
|
||
<li>Design selection — Option B confirmed</li>
|
||
<li>Whiffletree architecture — defined</li>
|
||
<li>Lateral support architecture — defined</li>
|
||
<li>Refined contact model — conservative basis</li>
|
||
<li>Schott quote received — $525K</li>
|
||
</ul>
|
||
</div>
|
||
<div style="text-align:left;">
|
||
<h3 style="color:var(--cyan);">🔜 Post-CDR Priorities</h3>
|
||
<ul style="font-size:0.65em;">
|
||
<li class="fragment fade-up"><b>Frame stiffness characterization</b> (ΔWFE vs. K sweep)</li>
|
||
<li class="fragment fade-up">Reference frame preliminary design</li>
|
||
<li>Whiffletree detailed design</li>
|
||
<li>Lateral support detailed design</li>
|
||
<li>ICD finalization with StarSpec</li>
|
||
<li>Modal analysis (frame + mirror)</li>
|
||
<li>STOP analysis (StarSpec scope)</li>
|
||
</ul>
|
||
</div>
|
||
</div>
|
||
</section>
|
||
|
||
<!-- ===== TIMELINE ===== -->
|
||
<section>
|
||
<h2>Path to FDR — Timeline</h2>
|
||
<div class="timeline">
|
||
<div class="timeline-item done">
|
||
<div class="date">January 2026</div>
|
||
<div class="desc"><b>CDR Approval</b> & Design Selection</div>
|
||
</div>
|
||
<div class="timeline-item done">
|
||
<div class="date">January 20, 2026</div>
|
||
<div class="desc"><b>Blank Order</b> — Schott PO placement</div>
|
||
</div>
|
||
<div class="timeline-item">
|
||
<div class="date">February 2026</div>
|
||
<div class="desc"><b>Frame stiffness characterization</b> — Highest priority post-CDR</div>
|
||
</div>
|
||
<div class="timeline-item">
|
||
<div class="date">Feb–March 2026</div>
|
||
<div class="desc"><b>Reference frame preliminary design</b> + ICD coordination</div>
|
||
</div>
|
||
<div class="timeline-item">
|
||
<div class="date">April–June 2026</div>
|
||
<div class="desc"><b>Support hardware detailed design</b></div>
|
||
</div>
|
||
<div class="timeline-item">
|
||
<div class="date">May 26, 2026</div>
|
||
<div class="desc"><b>Blank delivery</b> from Schott (18 weeks)</div>
|
||
</div>
|
||
<div class="timeline-item">
|
||
<div class="date">June–August 2026</div>
|
||
<div class="desc"><b>Polishing</b> at Optiques Fullum</div>
|
||
</div>
|
||
<div class="timeline-item">
|
||
<div class="date">Q3 2026</div>
|
||
<div class="desc"><b>FDR</b> — Final Design Review</div>
|
||
</div>
|
||
</div>
|
||
</section>
|
||
|
||
<!-- ===== REQUIREMENT COMPLIANCE ===== -->
|
||
<section>
|
||
<h2>Requirement Compliance Summary</h2>
|
||
<table>
|
||
<thead><tr><th>Category</th><th>Metric</th><th>Achieved</th><th>Requirement</th><th>Margin</th><th>Status</th></tr></thead>
|
||
<tbody>
|
||
<tr><td>Optical</td><td>WFE 40°</td><td>7.70 nm</td><td>22 nm</td><td>65%</td><td style="color:var(--green);">✓</td></tr>
|
||
<tr><td>Optical</td><td>WFE 60°</td><td>17.69 nm</td><td>22 nm</td><td>20%</td><td style="color:var(--green);">✓</td></tr>
|
||
<tr><td>Optical</td><td>MFG 90°</td><td>37.06 nm</td><td>—</td><td>Acceptable</td><td style="color:var(--green);">✓</td></tr>
|
||
<tr><td>Mechanical</td><td>Mass</td><td>95.81 kg</td><td>103.5 kg</td><td>+7.4%</td><td style="color:var(--green);">✓</td></tr>
|
||
<tr><td>Mechanical</td><td>Clear Aperture</td><td>1202 mm</td><td>1200 mm</td><td>—</td><td style="color:var(--green);">✓</td></tr>
|
||
<tr><td>Cost</td><td>Blank Quote</td><td>$525K</td><td>$523K</td><td>+0.4%</td><td style="color:var(--green);">✓</td></tr>
|
||
<tr><td>Dynamic</td><td>Mode 1</td><td>250.4 Hz</td><td>> 150 Hz</td><td>67%</td><td style="color:var(--green);">✓</td></tr>
|
||
</tbody>
|
||
</table>
|
||
<br>
|
||
<div class="success-box">
|
||
<p style="font-size:0.7em;">All requirements met with margin. Design is mature and validated.</p>
|
||
</div>
|
||
</section>
|
||
|
||
<!-- ===== RECOMMENDATION ===== -->
|
||
<section data-background-gradient="radial-gradient(900px 500px at 30% 20%, rgba(125,211,252,0.12), transparent 55%), radial-gradient(600px 400px at 80% 70%, rgba(167,139,250,0.10), transparent 60%), linear-gradient(135deg, #070a0f 0%, #0e1420 100%)">
|
||
<h2 style="color:var(--fg);">Recommendation</h2>
|
||
<div style="background:rgba(255,255,255,0.04); border:1px solid rgba(232,238,247,0.10); border-radius:14px; padding:32px; max-width:650px; margin:0 auto; backdrop-filter:blur(8px);">
|
||
<p style="font-size:1.0em; color:var(--fg); font-weight:700;">Approve CDR & proceed with blank procurement</p>
|
||
<hr style="border:none; height:1px; background:rgba(232,238,247,0.10); margin:16px 0;">
|
||
<div style="text-align:left;">
|
||
<ul style="font-size:0.68em; color:rgba(232,238,247,0.9); line-height:1.8;">
|
||
<li class="fragment fade-up"><b>Design maturity:</b> 3,770+ FEA simulations, confirmed convergence</li>
|
||
<li class="fragment fade-up"><b>Performance:</b> WFE 20–65% margin (conservative contact model)</li>
|
||
<li class="fragment fade-up"><b>Mass:</b> 7.4% under allocation</li>
|
||
<li class="fragment fade-up"><b>Cost:</b> Within 0.4% of budget ($525K)</li>
|
||
<li class="fragment fade-up"><b>Schedule critical:</b> 18-week lead time — quote valid until March 4</li>
|
||
</ul>
|
||
</div>
|
||
<hr style="border:none; height:1px; background:rgba(232,238,247,0.10); margin:16px 0;">
|
||
<p style="font-size:0.75em; color:var(--cyan);">Next investment: Reference frame characterization + detailed support design → FDR Q3 2026</p>
|
||
</div>
|
||
</section>
|
||
|
||
<!-- ===== INVESTMENT CASE ===== -->
|
||
<section>
|
||
<h2>The Investment Case — Continuing to FDR</h2>
|
||
<div style="text-align:left; max-width:680px; margin:0 auto;">
|
||
<h3>What the next phase delivers</h3>
|
||
<div class="three-col" style="margin-top:12px;">
|
||
<div class="metric-card" style="text-align:left; padding:14px;">
|
||
<p style="font-size:0.6em; font-weight:700; color:var(--cyan);">Frame Characterization</p>
|
||
<p style="font-size:0.55em;">ΔWFE vs. stiffness curve — converts "reference frame risk" into a quantified, verifiable engineering requirement</p>
|
||
</div>
|
||
<div class="metric-card" style="text-align:left; padding:14px;">
|
||
<p style="font-size:0.6em; font-weight:700; color:var(--cyan);">Detailed Hardware Design</p>
|
||
<p style="font-size:0.55em;">Whiffletree + lateral supports ready for fabrication. ICD locked with StarSpec.</p>
|
||
</div>
|
||
<div class="metric-card" style="text-align:left; padding:14px;">
|
||
<p style="font-size:0.6em; font-weight:700; color:var(--cyan);">Polished Mirror</p>
|
||
<p style="font-size:0.55em;">Finished M1 primary mirror, verified against optical specs. Ready for integration.</p>
|
||
</div>
|
||
</div>
|
||
<br>
|
||
<h3>Why continue now</h3>
|
||
<ul style="font-size:0.65em;">
|
||
<li class="fragment fade-up">3,770+ simulations have <b>retired the major technical risk</b> — blank design is settled</li>
|
||
<li class="fragment fade-up">The path from CDR → FDR is <b>known engineering</b>, not research</li>
|
||
<li>Schott quote expires March 4 — delay means re-quoting at likely higher cost</li>
|
||
<li>Parallel development maximizes schedule efficiency</li>
|
||
</ul>
|
||
<br>
|
||
<div class="highlight-box">
|
||
<p style="font-size:0.68em;"><b>Bottom line:</b> The hard part is done. Proceeding now converts 4 months of computational investment into a validated, flight-ready mirror assembly.</p>
|
||
</div>
|
||
</div>
|
||
</section>
|
||
|
||
<!-- ===== CLOSING ===== -->
|
||
<section data-background-gradient="radial-gradient(900px 500px at 30% 20%, rgba(125,211,252,0.12), transparent 55%), radial-gradient(600px 400px at 80% 70%, rgba(167,139,250,0.10), transparent 60%), linear-gradient(135deg, #070a0f 0%, #0e1420 100%)">
|
||
<h1 style="color:var(--fg);">Thank You</h1>
|
||
<p style="color:var(--muted); font-size:0.75em;">Questions & Discussion</p>
|
||
<br>
|
||
<p style="color:rgba(232,238,247,0.4); font-size:0.55em;">Optiques Fullum & Atomaste Solution — January 2026</p>
|
||
<p style="color:rgba(232,238,247,0.4); font-size:0.55em;">GigaBIT M1 Primary Mirror — Critical Design Review</p>
|
||
</section>
|
||
|
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|
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|
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