To enhance the optical recognition and wavelength filtering of an infrared cold optical system, some lens need to be maintained within a certain temperature range, which requires specific thermal management of the aperture. A 250K liquid cooling circuit designed for this purpose is introduced, and the experimental results established and operated in a vacuum environmental simulation chamber is carried out and analyzed. A practical cooling power source of radiation cooling equipment is adopted and the sun exposure heat load is imitated by array of planar membrane heaters attached on the specific designed structure of the aperture. Controlling the aperture temperature and improving the optical system performance are proved effective. Numerical optimization of the cooling circuit and simulation of the aperture are performed , and the factors affect the optical system performance in the mean time are also investigated.
RongJian Xie, "A pump driving liquid cooling circuit method for the aperture of an infrared cold optical system," Proc. SPIE 10180, Tri-Technology Device Refrigeration (TTDR) II, 101800H (Presented at SPIE Defense + Security: April 11, 2017; Published: 16 June 2017); https://doi.org/10.1117/12.2262340.
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