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Jinjin Chen, Junhong Su, Ning Jin, Zexiao Li, Xiaodong Zhang, Hao Zhang and Ligang Zhou
In this paper, we used a freeform lens in a long-wave, un-cooled, refractive infrared (IR) thermal imager and present the design strategy and test results. This optical system is composed of only one freeform lens and several spheres. It can correct the ...
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