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Adaptive Secondary Glass Production

Adaptive Secondary Glass Production. G. Brusa. Outline. Production process Current status Characterization of Thin Shells Residual Figure Error Is there and effect of granite blocking (?) Tools for handling Schedule. RB production steps. FS generating FS grinding Holes drilling

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Adaptive Secondary Glass Production

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  1. Adaptive Secondary Glass Production G. Brusa

  2. Outline • Production process • Current status • Characterization of Thin Shells • Residual Figure Error • Is there and effect of granite blocking (?) • Tools for handling • Schedule

  3. RB production steps • FS generating • FS grinding • Holes drilling • BS generating • Edging and coring • Gold coating (RB#1&2)

  4. TS production steps • FS Generating • FS Grinding • FS Figuring • FS Blocking (TS#1) • BS Generating (Thinning) • BS Grinding and polishing (TS#2) • Edging and coring • De-blocking • Aluminizing

  5. RBCompleted*. Sec. #1 (B) TS Polishing of front surface completed. Status RB Completed. In Italy for integration. Sec. #2 (A) TS Polishing of back surface.

  6. Optical Measurements • Interferogram (with null lens). (To determine figure error) • Conjugate points. (To determine vertex RoC and conic constant).

  7. Shell #2 – Figuring Error (I)

  8. Shell #2 – Figuring Error (II)

  9. Shell #2 – Figuring Error (I)

  10. Shell #1 – Figuring Error (II)

  11. Is there a CTE effect?

  12. Handling Frame

  13. Coating Fixture Main frame, Swivel lift at center, secure to coating chamber at ends Equalizer, rod end pivot, travel limits and anti-rotation Location for center lift swivel

  14. Shipping Crate (I) Outer Wooden box Inner Wooden box

  15. Lateral loads between the shell and the container are reacted by the compliant conical retainer at the OD. 4” thick, fiberglass-foam cored sandwich panels Foam Shell RTV Steel Frame Inner Box Shipping Crate (II)

  16. Schedule • TS#2 arrives in Italy in: 5-9 weeks (sometime before end of April) • TS#1 and RB#1 arrive in Italy in: 15-18 weeks (sometime before end of June)

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