Athermal design of a compact MWIR dual field-of-view optical system

Jiaguo Liu; Ting Li

doi:10.1117/12.2504617

12 December 2018 Athermal design of a compact MWIR dual field-of-view optical system

Jiaguo Liu, Ting Li

Proceedings Volume 10846, Optical Sensing and Imaging Technologies and Applications; 1084618 (2018) https://doi.org/10.1117/12.2504617
Event: International Symposium on Optoelectronic Technology and Application 2018, 2018, Beijing, China

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.

Citation Download Citation

Jiaguo Liu and Ting Li "Athermal design of a compact MWIR dual field-of-view optical system", Proc. SPIE 10846, Optical Sensing and Imaging Technologies and Applications, 1084618 (12 December 2018); https://doi.org/10.1117/12.2504617

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