1 / 14

Earth Atmosphere Solar-Occultation Imager

Earth Atmosphere Solar-Occultation Imager. Optics Cathy Marx [Dennis Evans] 2 August 2002. General System Description. Main Pupil Radius = 4400 mm Individual Telescopes Afocal, dual paraboloid Primary Aperture = 425 mm radius (needs to be 400 mm) Vertex Radius = -2631.578947 mm

keefe
Download Presentation

Earth Atmosphere Solar-Occultation Imager

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript


  1. Earth AtmosphereSolar-Occultation Imager Optics Cathy Marx [Dennis Evans] 2 August 2002

  2. General System Description • Main Pupil • Radius = 4400 mm • Individual Telescopes • Afocal, dual paraboloid • Primary • Aperture = 425 mm radius (needs to be 400 mm) • Vertex Radius = -2631.578947 mm • Secondary • Aperture = 24 mm radius (to 30 to shadow Fold 1) • Vertex Radius = -131.578947 mm • Intervertex Distance • 1250 mm

  3. General System Description • Afocal Telescope Center Locations • -4000, -2000, 0, 3000, 4000 mm • Even integral spacing is causing extra flux in PSF ‘wings’. • Combiner Telescope • Ritchey-Chretien • Prescription: EASI NS - 2dce-a-no obsc-PLEN OK.ZMX • 250 mm off center. • Plate Scale from spot diagram • One arc second = 1.833 mm • Effective Focal Length = 378151.4572 mm • Airy Radius (2µ) 425 mm radius aperture = 1.085 mm • 4400 mm radius aperture = 0.105 mm

  4. Status • Delay Lines • Being located so they don’t exceed boom length • Being located on opposite sides of centerline to avoid interference • This may increase the size of the combiner significantly • Collector Spacing • Even dimension spacing causes excess flux in “wings” of PSF interferogram • ZEMAX Tech Support • PLEN (Path Length) misses surface problem in Merit Function Editor

  5. X-fan Layout

  6. Viewing Aft

  7. Viewing Aft (note stray rays)

  8. X-fan Layout; Telescope 1 at X= -4000 mm

  9. X-fan Layout; Telescope 1 at X= -0 mmCombiner is at X= 1000 mm

  10. Five Telescope Spot Diagram

  11. One (center) Telescope Image Interferogram

  12. Five Telescope Image Interferogram

  13. Five Telescope Image InterferogramAlternate Spacing; Combiner at 0

More Related