提出了一种多焦距短筒功率谱采集透镜 (PSCL) 系统设计方案,系统由前组透镜、后组透镜和4倍透镜组组成.F500傅里叶透镜作为前组透镜固定,加后组透镜,实现焦距F500至F800或F1000的切换.在F500或F1000系统后增加4倍透镜组,实现F2000或F4000的光学系统.设计结果表明,该方案缩短了透镜系统筒长,且像质良好.该透镜系统适用于多种焦距值切换的光学系统和仪器的小型化.

A compact power spectrum collection lens (PSCL) system is proposed in this paper. The system consists of former lens, later lens and magnifying lens. In this system the former lens of F500 is fixed, the focal length of later lens can be changed to realize the focus-length of F500, F800 and F1000. The former lens component is F500 or F1000, as the later lens component, a magnifying lens of 4 times change focus-length of the system from F500 to F2000 or from F1000 to F4000. The lens barrel length of the optical system is no more than 1020 mm. In this way, the lens barrel length of the whole system is shorter, and it has good image quality. This lens system can be used in those optical systems with various focus length and it can shorten the lens barrel length of the whole system.