双像双视场红外光学系统

IR Optical System with Dual Field of View and Dual-image

介绍了一种双像双视场红外光学系统,对其设计方法、分光原理和分光元件进行了深入讨论。由于使用了孔径分光、光楔对双视场图像进行空间分离、二向色性分束镜进行光谱细分,两光路合一,使卡塞格林光学系统的潜力得到了充分发挥,实现了共窗口、共探测器的双像双视场成像光学系统。系统能提供一幅场景的两幅图像,两视场之间无需切换,两视场具有不同的光谱波段。通过电子系统的波段比处理技术,能提高整机系统的抗干扰能力,提高整机系统的探测精度和识别概率。

A novel dual field of view optical system with dual image was presented , the design methods of this system , the operational principle of beamsplitter and the optical wedge are discussed respectively. Because of the different apertures applied to split optical beams, the optical wedges applied to separate the two images, and the dichroic beamsplitter used to split the wavebands, the applications of the Casegrain telescope is extended, and the overall imaging optical system is realized with a same window and a same detector. This optical system can form two images on a scene at different fields of view and different wavebands simultaneously, without converting from NFOV to WFOV. Based on the image processing of the ratio of two wavebands, the anti-interference, the detective precision, the identifiabllity of the total system shall be improved.