Acta Optica Sinica, Volume. 30, Issue 7, 2089(2010)
Athermalization Design of Wide Temperature Range for Hybrid Refractive-Diffractive Objective in 8-12 μm
A large relative aperture athermalized infrared optical system with wide field of view is introduced. The working wavelength is 8-12 μm;the full field of view is 40°;the effective focal length is 6 mm;the relative aperture is 1.25;the total optical length is 50 mm;and the back focal length (BFL) is 15 mm. It consists of a diffraction surface and two aspheric surfaces with a triplet structure,only using germanium and ZnSe. The system is simple,low mass and high image quality. The evaluation of the system is given in the temperature range of -80 ℃-200 ℃. The results show that the modulation transformation function (MTF) is near to 0.7 at the spatial frequency of 16 lp/mm and also near to the diffraction limit.
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Chen Xiao, Yang Jianfeng, Ma Xiaolong, Bai Yu, He Jike, He Jianwei. Athermalization Design of Wide Temperature Range for Hybrid Refractive-Diffractive Objective in 8-12 μm[J]. Acta Optica Sinica, 2010, 30(7): 2089
Category: Optical Design and Fabrication
Received: Sep. 1, 2009
Accepted: --
Published Online: Jul. 13, 2010
The Author Email: Xiao Chen (chenxiao.45678@163.com)