Analysis of a conical and a hexapod secondary mirror support tower for the Next-Generation Space Telescope (NGST)

Computer Science

Scientific paper

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

Scientific paper

Different secondary mirror support towers (pedestals) were modeled for the NGST Optical Telescope Assembly (OTA) B. Transmittance analyses at two levels were performed on the secondary mirror support towers. Detailed transmittances were accomplished by the use of the CODE V optical design/analysis program and were compared to a quick approximation method that required only tracing four rays. A way to obtain simple, very quick approximate transmittances without raytrace also developed by the same author, is laid out. Point spread function (PSF) calculations, including both diffraction and aberration effects, were performed on CODE V. PSF contours can be delineated on CODE V down to about 10(superscript -8) times the peak intensity, fine detailing the differences in the wings of the PSF. As one goes out from the center of the blur (for a point source), two types of support towers showed little difference between their PSF intensities until one reaches about the 3% level. Between the first type of tower and the hexapod tower below 3% of the peak intensity, the PSF contour maps well delineated significant differences in the outer portions of the PSFs. The hexapod tower provided the best PSF. Such differences in the wings of the PSF significantly impact the resolution of brown dwarfs or extra solar planets from their star.

No associations

LandOfFree

Say what you really think

Search LandOfFree.com for scientists and scientific papers. Rate them and share your experience with other people.

Rating

Analysis of a conical and a hexapod secondary mirror support tower for the Next-Generation Space Telescope (NGST) does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Analysis of a conical and a hexapod secondary mirror support tower for the Next-Generation Space Telescope (NGST), we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Analysis of a conical and a hexapod secondary mirror support tower for the Next-Generation Space Telescope (NGST) will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFWR-SCP-O-1545846

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.