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Proceedings Paper

Design of a diffractive variable magnification telescope
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Paper Abstract

For applications in Doppler radar processing, it is necessary to convolve a one-dimensional signal with spatially scaled versions of a single reference. To achieve this one can expand the reference in one dimension, image it though a system that has variable-magnification in this dimension, and perform a one- dimensional convolution with the input signal in the orthogonal direction. To realize the variable magnification imaging system, we consider the construction of a telescope that uses two hybrid diffractive-refractive elements. The refractive component for the elements is a cylindrical lens that provides bias focussing power. The diffractive component for the first element provides the modulation of the optical power necessary to achieve variable- magnification. The second diffractive component is used to correct the phase of the output image and produce a collimated output. Closed form and iterative designs are presented.

Paper Details

Date Published: 17 June 1994
PDF: 7 pages
Proc. SPIE 2152, Diffractive and Holographic Optics Technology, (17 June 1994); doi: 10.1117/12.178069
Show Author Affiliations
Joseph Neil Mait, U.S. Army Research Lab. (United States)
Michael Hoppe, Rochester Photonics Corp. (United States)

Published in SPIE Proceedings Vol. 2152:
Diffractive and Holographic Optics Technology
Ivan Cindrich; Sing H. Lee, Editor(s)

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