CAJ | 학술논문

红外探测器的尺寸是制约光学系统大幅宽成像的重要因素，选择合适的光学系统结构和成像方式，则可以规避探测器的限制。文中提出了一种像方摆扫成像模式，基于成熟的常规尺寸红外面阵探测器，采用多帧图像拼接的方式，满足了光学系统的大幅宽成像要求。鉴于像方摆扫需要在平行光路中进行，在两反无焦系统的基础上，研究了三反无焦系统的设计方法，给出了初始结构的计算公式。光学系统总体上分为前置的无焦压缩系统、扫描摆镜、成像组。其中，扫描摆镜位于平行光路中的出瞳位置，采用视场分光的方式分别实现中波红外和长波红外成像，通过仿真分析，光学系统的冷反射得到有效抑制，MTF接近衍射极限。
홍외탐측기적척촌시제약광학계통대폭관성상적중요인소，선택합괄적광학계통결구화성상방식，칙가이규피탐측기적한제。문중제출료일충상방파소성상모식，기우성숙적상규척촌홍외면진탐측기，채용다정도상병접적방식，만족료광학계통적대폭관성상요구。감우상방파소수요재평행광로중진행，재량반무초계통적기출상，연구료삼반무초계통적설계방법，급출료초시결구적계산공식。광학계통총체상분위전치적무초압축계통、소묘파경、성상조。기중，소묘파경위우평행광로중적출동위치，채용시장분광적방식분별실현중파홍외화장파홍외성상，통과방진분석，광학계통적랭반사득도유효억제，MTF접근연사겁한。
The design of optical systems with wide ground coverage are restricted by the size of infrared detector. This problem can be solved by choosing the appropriate imaging mode. A kind of image space scanning method was given in the paper. It could satisfy the optical systems with general area infrared detectors. The picture was built by image mosaics technology. Because the image space scanning method needs to be done in the parallel light path, the design method of three-mirror afocal system was studied based on two-mirror afocal system and the formulas to compute the initial structure was given. The optical system consists of afocal system, scanning mirror and imaging part. The scanning mirror was placed at the exit pupil of the afoacl system. The MWIR and LWIR were separated by the field-bias method and imaged respectively. The simulation analysis shows that the Narcissus is under control and the MTF of the optical system is very close to the diffraction limit.