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为了探测更高轨道的空间目标,研制了一台通光口径为Ф750mm的望远镜.该望远镜为主焦点光学系统,由一片二次非球面反射元件和四片透射元件组成,具有大视场(4°),大相对孔径(1∶1.32)和宽光谱(500～800nm)的特点.本文以该望远镜的研制为基础,介绍了其光学系统各个元件的单独检测和系统装调完成后的整体检测方法和过程.采用样板法对系统中的球面透射元件进行了单独检测,采用透射无像差补偿器法对二次非球面反射镜进行了单独检测,采用反射无像差补偿器法对组合起来的透射校正镜组进行了检测,并且对系统装调对准之后的光学系统进行室内平行光管和室外对星观测两种方法进行检测.测量结果均满足设计要求,其中球面透镜的面形误差小于0.1个光圈,反射元件和透射元件非球面表面的面形误差均优于λ/30(λ=632.8nm),透射校正镜组的波像差优于λ/30(λ=632.8nm).光学系统整体检测结果表明,室内和室外检测结果一致,其像面的80%能量集中度直径在4°的全视场范围内均小于2个像元,达到了设计的成像要求.
In order to probe the space orbit of higher orbit, a telescope with a Ф750mm aperture was developed, which is a main focal optical system composed of a secondary aspherical reflective element and four transmissive elements, with a large field of view (4 °), large relative aperture (1: 1.32) and wide spectrum (500 ~ 800nm) .In this paper, based on the development of the telescope, the individual detection of the optical system components and the overall detection after the system is completed Method and process.The spherical transmission element in the system was detected by the method of model independently and the secondary aspheric mirror was tested by the method of transmission without aberration compensator.At the same time, Of the transmission correction lens group were detected, and the system after the alignment of the optical system for indoor collimator and outdoor observation of the two methods were measured star, the measurement results meet the design requirements, spherical aberration in which the lens surface error The shape error of the aspheric surface of the reflective element and the transmissive element is better than λ / 30 (λ = 632.8 nm) when less than 0.1 aperture, and the wavefront aberration of the transmission correction mirror set is better than λ / 30 (λ = 632.8 nm). Light The overall system test results show that the indoor and outdoor test results are consistent, and the 80% energy concentration of the image plane is less than 2 pixels in the full field of view at a 4 ° diameter, which meets the designed imaging requirements.