Lens mount for a refractive optics cooled by pulse tube cryocooler

Zhaoli Wang; Jingtao Liang; Miguang Zhao; Houlei Chen; Juan Wang; Lingjiao Wei

doi:10.1117/12.2520319

12 March 2019 Lens mount for a refractive optics cooled by pulse tube cryocooler

Zhaoli Wang, Jingtao Liang, Miguang Zhao, Houlei Chen, Juan Wang, Lingjiao Wei

Proceedings Volume 11023, Fifth Symposium on Novel Optoelectronic Detection Technology and Application; 110232G (2019) https://doi.org/10.1117/12.2520319
Event: Fifth Symposium on Novel Optoelectronic Detection Technology and Application, 2018, Xi'an, China

Abstract

Integration of optics inside a detector-dewar-cooled-assembly (DDCA) is a good strategy to miniaturized infrared cameras in order to provide small payload systems with thermal vision capability for both military and civilian applications. The optical additional mass has to be very small in order to limit the cool-down time of the DDCA. However, reducing the mass of these optical systems results in a decrease of the resolution and impaction on the image quality, making them difficult to use in the high-performance and high sensitivity applications. In order to achieve better optical performances, a classical optical system which consisted of four lenses was integrated in the DDCA. By optimizing the heat transfer of the lens mount and using a miniature pulse tube cryocooler(MPTC) as the cooling source, the cooling time of the system was reduced. The lens mount and the lenses were cooled down to 80K in an hour by the MPTC with 45W input power. The total mass to be cooled is 100 g, where the mass of the lenses is 15 g. In the later prototypes, the mass of the lens mount can be greatly reduced by optimizing the installation of the detector and the lens mount, and the cooling time of the cryogenic camera integrated with the high-performance optical system can be reduced to an acceptable range by using the lens mount heat transfer optimization method described in this paper.

Citation Download Citation

Zhaoli Wang, Jingtao Liang, Miguang Zhao, Houlei Chen, Juan Wang, and Lingjiao Wei "Lens mount for a refractive optics cooled by pulse tube cryocooler", Proc. SPIE 11023, Fifth Symposium on Novel Optoelectronic Detection Technology and Application, 110232G (12 March 2019); https://doi.org/10.1117/12.2520319

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KEYWORDS

Cameras

Cryocoolers

Cryogenics

Integrated optics

Sensors

Infrared cameras

Optical components

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