不同光瞳对波前编码成像系统的影响  

Influence of different pupils on the wavefront coding imaging system

作　　者：郝爱花[1] 

机构地区：[1]西安邮电学院电子工程学院,陕西西安710121

出　　处：《红外与激光工程》2010年第4期711-714,共4页Infrared and Laser Engineering

基　　金：西安邮电学院青年基金资助项目(101-0406)

摘　　要：波前编码成像技术是一种光学编码和数字解码相结合进行景深延拓非常有效的技术。为了深入研究波前编码成像系统的成像性能,在介绍了波前编码成像原理的基础上,通过对比分析方形光瞳和圆形光瞳在编码前后分别对应不同离焦情况下的点扩散函数PSF和相应光学系统的模拟成像,得出:在传统光学系统中,圆形光瞳的离焦抑制能力优于方形光瞳;而在波前编码光学系统中,方形光瞳的离焦抑制能力明显优于圆形光瞳。这一结果对光学系统设计工作者具有非常重要的参考价值。Wavefront coding imaging technique is an efficient method for field depth extension,which combines optical encoding and digital decoding steps.For further study of the system′ s imaging performance,the imaging principle was simply introduced,the point spread function（PSF） of traditional optical system and wavefront coding optical imaging system of square pupils and circle pupils were compared respectively with different defocus.The results show that the defocus tolerance of the traditional circular pupil optical system is superior to square pupil optical system before encoding.On the contrary,in the wavefront coding optical system,the defocus tolerance of square pupil is obviously better than a circular pupil.It is a very important reference to optical system designers.

关 键 词：波前编码 光瞳 景深延拓 离焦 像差 

分 类 号：N34[自然科学总论]