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Proceedings Paper

Diffraction-limited constant-resolution zoom lens across multi-wavelengths for the Advanced Technology Solar Telescope
Author(s): Hyun Kyoung An; Stephen K. Pitalo
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Paper Abstract

Zoom lenses are usually designed for a specified waveband and change magnification, and thus resolution, for different object sizes or different object distances. However, the Advanced Technology Solar Telescope (ATST)/ Visible Light Broadband Imager (VLBI), under development by the National Solar Observatory, require constant resolution for different wavelengths over a wide spectral range (388.3 nm 3o 854.2 nm). An eight-element zoom lens meeting this requirement is presented, and yields diffraction-limited performance over the field of view at nine specific wavelength/zoom positions. Each zoom position, corresponding to a specific wavelength, has a focal length and f/number for achieving constant CCD sampling. The Strehl ratio of the telescope is greater than 90% over all zoom positions.

Paper Details

Date Published: 18 July 2006
PDF: 12 pages
Proc. SPIE 6342, International Optical Design Conference 2006, 63421L (18 July 2006); doi: 10.1117/12.692300
Show Author Affiliations
Hyun Kyoung An, Univ. of Alabama in Huntsville (United States)
Stephen K. Pitalo, Univ. of Alabama in Huntsville (United States)

Published in SPIE Proceedings Vol. 6342:
International Optical Design Conference 2006
G. Groot Gregory; Joseph M. Howard; R. John Koshel, Editor(s)

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