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波前编码成像由于可以大大扩展非相干成像系统的景深而不降低像质,成为近年来的研究热点。文章首先介绍了波前编码原理,然后基于波前编码原理对现有空间中波红外光学系统进行了优化改进,比较了原光学系统和改进系统在不同温度环境下的点扩散函数(PSF)、调制传递函数(MTF),结果表明,新系统在更大的温度范围内具有稳定的成像性能。
Wavefront coding has become a research hotspot in recent years due to its ability to greatly expand the depth of field of non-coherent imaging systems without degrading image quality. In this paper, the principle of wavefront coding is firstly introduced. Then the wave infrared optical system in the existing space is optimized and improved based on the principle of wavefront coding. The PSF (Point Diffusion Function) of the original optical system and the improved system in different temperature environments are compared. The modulation transfer function (MTF) results show that the new system has stable imaging performance over a wide temperature range.