Optical design of off-axis freeform reflective zoom imaging system with large relative aperture

Jiajing Cao; Jun Chang; Junya Wang; Bingqing Xie; Dongmei Li

doi:10.1117/12.2685883

28 November 2023 Optical design of off-axis freeform reflective zoom imaging system with large relative aperture

Jiajing Cao, Jun Chang, Junya Wang, Bingqing Xie, Dongmei Li

Proceedings Volume 12765, Optical Design and Testing XIII; 127650E (2023) https://doi.org/10.1117/12.2685883
Event: SPIE/COS Photonics Asia, 2023, Beijing, China

Abstract

Off-axis reflective zoom imaging optical system has a wide range of applications in the field of photoelectric detection because of its advantages of chromatic aberration-free, broad-spectrum imaging. The existing off-axis reflective zoom imaging optical system has a fixed pupil diameter, and as the focal length becomes larger, the relative aperture becomes smaller, resulting in a lower signal-to-noise ratio and weaker detection capability. Additionally, aberration correction is vitally important in the off-axis reflective zoom system with large relative aperture. An attempt to improve the performance of an off-axis reflective zoom imaging system with large relative aperture using freeform surface is reported. The F number is 4, and the zoom ratio is 3. The optical design with freeform surfaces shows marked improvements compared with the design with higher order aspheric surfaces.

(2023) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

Jiajing Cao, Jun Chang, Junya Wang, Bingqing Xie, and Dongmei Li "Optical design of off-axis freeform reflective zoom imaging system with large relative aperture", Proc. SPIE 12765, Optical Design and Testing XIII, 127650E (28 November 2023); https://doi.org/10.1117/12.2685883

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