Design of reimaging F/1.0 long-wavelength infrared optical system

Xin Zhang; Bo Liu; Hong-guang Jia

doi:10.1117/12.898849

8 September 2011 Design of reimaging F/1.0 long-wavelength infrared optical system

Xin Zhang, Bo Liu, Hong-guang Jia

Proceedings Volume 8193, International Symposium on Photoelectronic Detection and Imaging 2011: Advances in Infrared Imaging and Applications; 81930K (2011) https://doi.org/10.1117/12.898849
Event: International Symposium on Photoelectronic Detection and Imaging 2011, 2011, Beijing, China

Abstract

A reimaging F/1.0 long-wavelength infrared optical system is proposed. The design has a flexible opto-mechanical layout. The design process is as follows. Firstly, the catadioptric reimaging system consists of two reflecting mirrors and a relay lenses. Two reflecting mirrors make up of the first imaging system and are therefore free of chromatic aberrations, while low dispersion lenses were used in the reimaging system, so the optical system do not need achromatic design for a high image quality. Then, to correct high-order aberrations resulting from large relative aperture, more parameters need to be used with aspheric or diffractive surfaces due to modern optic technology development. Here, aspheric is selected for easily manufacture. Finally, the design is completed with the help of ZEMAX software. The effective focal length of the objective is 120mm and the field of view (FOV) is 4°. The simulated final design shows adequate image quality and the modulation transfer function (MTF) is close to diffraction limit. The effect of the surrounding environmental temperature is analyzed using the concept of thermal defocusing, and the thermal compensation is discussed.

Citation Download Citation

Xin Zhang, Bo Liu, and Hong-guang Jia "Design of reimaging F/1.0 long-wavelength infrared optical system", Proc. SPIE 8193, International Symposium on Photoelectronic Detection and Imaging 2011: Advances in Infrared Imaging and Applications, 81930K (8 September 2011); https://doi.org/10.1117/12.898849

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KEYWORDS

Mirrors

Relays

Infrared imaging

Modulation transfer functions

Long wavelength infrared

Image quality

Infrared sensors

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