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Athermal design of a compact MWIR dual field-of-view optical system
Author(s): Jiaguo Liu; Ting Li
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Paper Abstract

For cooled 640×512 mid-wave infrared focal plane array, a compact dual field-of-view (FOV) optical system was designed. The parameters of the optical system were 4°×3.2°/12°×9.6° FOV, 4 F/number, and 100% cold shield efficiency. To reduce the overall length, the system used direct imaging model and a single negative lens moving along the axis to switch FOV. The system had 5 lenses including 2 aspheric surfaces. Based on analysis of chromatic and thermal properties of common MWIR materials to select lens materials and assign focal power, the system realized aberrations correction and passive athermalization. The image quality of prototype was good and its image plane was stable between -40°C~60°C.

Paper Details

Date Published: 12 December 2018
PDF: 6 pages
Proc. SPIE 10846, Optical Sensing and Imaging Technologies and Applications, 1084618 (12 December 2018); doi: 10.1117/12.2504617
Show Author Affiliations
Jiaguo Liu, Science and Technology on Optical Radiation Lab. (China)
Ting Li, Science and Technology on Optical Radiation Lab. (China)

Published in SPIE Proceedings Vol. 10846:
Optical Sensing and Imaging Technologies and Applications
Mircea Guina; Haimei Gong; Jin Lu; Dong Liu, Editor(s)

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