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Southern African Large Telescope Prime Focus Imaging Spectrograph Mechanical Mechanism Design

Southern African Large Telescope Prime Focus Imaging Spectrograph Mechanical Mechanism Design Michael Smith University of Wisconsin - Madison. Introduction. Mechanism Preliminary Design Collimator Mechanisms Camera Mechanisms Articulation Packaging Lifting and Handling. Overview.

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Southern African Large Telescope Prime Focus Imaging Spectrograph Mechanical Mechanism Design

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  1. Southern African Large Telescope Prime Focus Imaging Spectrograph Mechanical Mechanism Design Michael Smith University of Wisconsin - Madison SALT PFIS Preliminary Design Review

  2. Introduction • Mechanism Preliminary Design Collimator Mechanisms Camera Mechanisms Articulation • Packaging • Lifting and Handling SALT PFIS Preliminary Design Review

  3. Overview Near IR Shutter Mechanism Grating mechanism Focus mechanism Camera Tube Filter Mechanism Mirror mechanism Visible Beam Collimator Lens Holder Etalon Mechanisms Slit mask mechanism Wave plate mechanism SALT PFIS Preliminary Design Review

  4. Slit Mask Mechanism Magazine Vertical Carrier CCD Camera Collimator Mirror Wave Plates Slit Masks Focal Plane First group lens mounting Rack Focal plane structure Horizontal Carrier SALT PFIS Preliminary Design Review

  5. Slit Mask Mechanism Slit masks Stepper Motor & pinion Rack with engaging tooth SALT PFIS Preliminary Design Review

  6. Wave Plate Mechanism SALT PFIS Preliminary Design Review

  7. Wave Plate Mechanism Linear Slide Optical axis Wave plate in stacked arrangement Slim Section Bearings Spur Gear Pinion Rotational Motor SALT PFIS Preliminary Design Review

  8. Mirror Mechanism Linear slide rails Motor - Linear actuation Beam location ( Z-axis) Trunion Base Plate SALT PFIS Preliminary Design Review

  9. Camera Assembly Near IR Shutter Mechanism Grating mechanism Focus mechanism Filter Mechanism CCD Camera with electronics Etalon Mechanisms Articulation Bearing Articulation Drive Light entry SALT PFIS Preliminary Design Review

  10. Focus Mechanism CCD Camera Collimator Focus Focal Plane Aerotech slide ATS0300 Series Lensholder SALT PFIS Preliminary Design Review

  11. Shutter Mechanism Aperture 162mm CCD Camera Collimator Shutter Focal Plane Solenoid/Pneumatic Cylinder SALT PFIS Preliminary Design Review

  12. Etalon holder Linear slide Slide Base plate Pneumatic Cylinder Actuation Etalon Mechanism CCD Camera Collimator Etalons Focal Plane SALT PFIS Preliminary Design Review

  13. VPH Grating Mechanism Grating VPH Spectroscopy Grating in the beam Camera Structure Spring loaded set screw CCD Grating housing Rotational Stage (Newport) SALT PFIS Preliminary Design Review

  14. Motor Polarizer in frame Worm and worm gear Support mounting on camera structure Polarizer Mechanism CCD Camera Collimator Polarizer Focal Plane SALT PFIS Preliminary Design Review

  15. Filter Mechanism Magazine Motion of Carrier Base plate for carrier CCD Camera Collimator Filter Focal Plane Carrier Motion of filter from magazine to carrier to holder Filter Holder SALT PFIS Preliminary Design Review

  16. Articulation Mechanism Motor Camera Articulates 0-90 degrees Camera Tube Pinion mates with gear on I beam Roller Bottom rollers with flexure I Beam with gear cut on top flange SALT PFIS Preliminary Design Review

  17. Packaging • Optical and mechanism sub-assemblies removable and packed in hard, padded, air-tight containers. • Frame structure packed in custom made crate. • Same container for transport and storage for swap-out items like etalons. • Instrument designed to facilitate easy dismantling, packing and reassembly. • On-site verification of optical alignment after reassembly. SALT PFIS Preliminary Design Review

  18. Lifting & Handling 1400 x 1400 Separator Frame 700mm 2500mm 12 Fixture Points SALT PFIS Preliminary Design Review

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