Design of a diffractive variable magnification telescope

Joseph Neil Mait; Michael Hoppe

doi:10.1117/12.178069

17 June 1994 Design of a diffractive variable magnification telescope

Joseph Neil Mait, Michael Hoppe

Proceedings Volume 2152, Diffractive and Holographic Optics Technology; (1994) https://doi.org/10.1117/12.178069
Event: OE/LASE '94, 1994, Los Angeles, CA, United States

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.

Citation Download Citation

Joseph Neil Mait and Michael Hoppe "Design of a diffractive variable magnification telescope", Proc. SPIE 2152, Diffractive and Holographic Optics Technology, (17 June 1994); https://doi.org/10.1117/12.178069

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