Infrared imaging lens with extended depth of focus

Zhiqiang Liu; Angel Flores; Michael R. Wang; Jame J. Yang

doi:10.1117/12.602990

31 May 2005 Infrared imaging lens with extended depth of focus

Zhiqiang Liu, Angel Flores, Michael R. Wang, Jame J. Yang

Proceedings Volume 5783, Infrared Technology and Applications XXXI; (2005) https://doi.org/10.1117/12.602990
Event: Defense and Security, 2005, Orlando, Florida, United States

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.

Citation Download Citation

Zhiqiang Liu, Angel Flores, Michael R. Wang, and Jame J. Yang "Infrared imaging lens with extended depth of focus", Proc. SPIE 5783, Infrared Technology and Applications XXXI, (31 May 2005); https://doi.org/10.1117/12.602990

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