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Proceedings Paper

Infrared imaging lens with extended depth of focus
Author(s): Zhiqiang Liu; Angel Flores; Michael R. Wang; Jame J. Yang
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Paper Abstract

An infrared imaging lens that produces beams with long focal depth whilst preserving the entire aperture for full light capturing and high transverse resolution is presented. It is a diffractive optical element that generates a long range of pseudo-non-diffractive rays. The design technique is based on the conjugate-gradient algorithm. The surface relief pattern was generated on a thick film photoresist and then the pattern was transferred to germanium substrate. Preliminary experimental results demonstrated four times improvement in depth of focus at 10.6 μm wavelength.

Paper Details

Date Published: 31 May 2005
PDF: 8 pages
Proc. SPIE 5783, Infrared Technology and Applications XXXI, (31 May 2005); doi: 10.1117/12.602990
Show Author Affiliations
Zhiqiang Liu, Univ. of Miami (United States)
Angel Flores, Univ. of Miami (United States)
Michael R. Wang, Univ. of Miami (United States)
Jame J. Yang, New Span Opto-Technology Inc. (United States)


Published in SPIE Proceedings Vol. 5783:
Infrared Technology and Applications XXXI
Bjorn F. Andresen; Gabor F. Fulop, Editor(s)

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