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WBO - Optics for WBS

WBO - Optics for WBS. Laser source module including redundancy Prism beam splitter Scan lens Cylindrical lens Polarizers. WBO - Optical Layout. WBO - Laser source specifications. Wavefront accuracy : λ /10 rms Power variation : ± 5%

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WBO - Optics for WBS

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  1. WBO - Optics for WBS • Laser source module including redundancy • Prism beam splitter • Scan lens • Cylindrical lens • Polarizers WBS CDR 2-3rd april 2003

  2. WBO - Optical Layout WBS CDR 2-3rd april 2003

  3. WBO - Laser source specifications • Wavefront accuracy : λ/10rms • Power variation : ± 5% • Deviation from the parallelism (horizontal) :5’ • Distance between the four beams in the • vertical direction :1.6 ± 0.02 mm • (0.01 goal) WBS CDR 2-3rd april 2003

  4. Prisms group Prisms Collimator group Mirror group WBO - Laser source WBS CDR 2-3rd april 2003

  5. WBO - Laser module Specifications LD Hitachi HL7851G (785 ± 3 nm) Beam convergence (vertical) 10.2° ± 1’ Beam alignment (horizontal) < 5’ LD position stability (on opt. axis) ± 1mm Weight 140 ± 20 g Titanium Collimator Cylindrical lens Focal length 8 mm ± 2% Wavefront accuracy l/10 AR coating V type SF6 RH glass Focal length 140 mm ± 2% Surface accuracy l/8 AR coating V type SF6 RH glass WBS CDR 2-3rd april 2003

  6. WBO - Laser module • Interferometer test @ l = 632 nm • and 50% aperture • Upper unit: rms 0.07 l, pv 0.37 l • Lower unit: rms 0.05 l, pv 0.29 l WBS CDR 2-3rd april 2003

  7. WBO - Prism beamsplitter • Power variation : ± 10% • Deviation from the parallelism (horizontal) :5’ • Distance between the four beams in the • vertical direction :1.6 ± 0.02 mm • (0.01 goal) WBS CDR 2-3rd april 2003

  8. WBO - Prism beamsplitter WBS CDR 2-3rd april 2003

  9. WBO - Prism Beamsplitter WBS CDR 2-3rd april 2003

  10. WBO - Scan optics Specifications • Focal length 100 mm • Surface accuracy l/10 • Clear aperture 35 mm • AR coating V type • Weight 300 g • BK7 SF6 RH glass • Interferometer test @ l = 632 nm • at full aperture • Rms 0.08 l, peak-valley 0.47 l WBS CDR 2-3rd april 2003

  11. WBO - Test bench WBS CDR 2-3rd april 2003

  12. WBO - Optics on testbench WBS CDR 2-3rd april 2003

  13. WBO - Prism performances The four beams at the cyl. lens focus The four beams at CCD WBS CDR 2-3rd april 2003

  14. WBO - Results on polarizers Interferometric test on a sample polarizer All 15 polarizers shows a surface accuracy better than l/10 @ 632 nm WBS CDR 2-3rd april 2003

  15. Time schedule of O.Galileo Schedule delay of approx. one month WBS CDR 2-3rd april 2003

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