Ms. Jiaqi Guo Profile

Jiaqi Guo

at Xi'an Institute of Applied Optics

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Proceedings Article | 12 April 2023 Paper

The system design of mid-wave infrared zoom lens

Jia-qi Guo, Ke Zhou, Jiao Chen, Hua Qiang

Proceedings Volume 12565, 1256528 (2023) https://doi.org/10.1117/12.2662591

KEYWORDS: Zoom lenses, Mirrors, Mid-IR, Optical design, Thermography, Infrared zoom, Infrared radiation, Infrared imaging

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The infrared continuous zoom optical system can realize the continuous change of focal distance in a certain range and keep the image surface stable and clear in the whole process of field of view change. Further integration and coordination of optical and mechanical design are required as infrared thermal imaging systems are increasingly used in high-precision applications of military and civil fields. However, the mid-wave infrared zoom system contain a large number of mirrors, a complex mechanism and higher design difficulty compared with other types of infrared zoom system. This paper introduced a mid-wave infrared zoom system, considering the design of optics and structures as well as the simplicity of assembly and adjustment. A stable and reliable small-F-number zoom infrared camera system which can meet the constraint condition was designed aiming at the key indicators such as imaging quality, optical axis shaking and adjusting operation. The operating wavelength band of the system was from 3.7 μm to 4.8 μm, the focal length was 30mm to 300mm, and the medium-wave refrigeration focal plane detector of pixels of 1024×768 was adopted. The optical imaging performance was close to diffraction limit, besides, image plane had a high consistency during the whole zooming process.

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