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FUV Design v.61: Enhanced Optics with Realistic Apertures and Performance Metrics

FUV Design v.61 integrates realistic apertures for all mirrors and incorporates considerations for footprint walk vs. misalignments, while maintaining optimal optical performance. The design features realistic substrate thicknesses, an aspect ratio of ~5:1, and achieves all performance goals including spectral filtering and minimized image spot sizes. This final optical design ensures functionality regarding max total envelope constraints, accessibility, and adjustability. Additional items for consideration include adjustments to the intensifier aperture and turret design for a lighter system.

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FUV Design v.61: Enhanced Optics with Realistic Apertures and Performance Metrics

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  1. FUV Design v.61 • includes realistic apertures on all mirrors • including allocation for footprint walk vs misalignments; not including physical oversizing • includes realistic thickness of substrates • aspect ratio ~5:1, conservative • performance meets goals • spectral filtering • image spot size

  2. FUV Design v.61 entrance slit = 5 x 32 mm fold mirror at AOI = 20deg flat grating, 3600 lpmm, 145mm CA

  3. FUV Design v.61 • v61 optics in pink, overlaid with mounts in v56 position • All workable: meets constraints for max total envelope, realistic optical mounts, adjustments, accessibility

  4. FUV Design v.61 LW channel: SW channel: • well-defined spectral separation at exit slits • completely separates 135.6nm and 130.4nm • 1.0 mm gap, allows margin for misalignments • completely separates 157nm and 149.3, 164.1nm • entrance slit width set is 5 x 32 mm

  5. FUV Design v.61 LW channel: SW channel: • rms spot diam = 41um ave in SW, 40um ave in LW • this easily meets our goal

  6. Path forward • open items: • Protek intensifier aperture will shadow the beam • Protek says can remove aperture entirely • maybe enlarge the hole? • turret scan mirror height • Paul to confirm height can be reduced by ~>25mm • leads to smaller, lighter scan mirror and turret • may depend on turret baffle design, will check in next 1-2 days • does not affect any other optics in design • This is final optical design, to be used going forward • tolerancing, mount design, stray light analysis, etc.

  7. Protek aperture

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