科研之友
微信
新浪微博
Facebook
分享链接
摘要
An off-axis four-mirror-anastigmatic telescope is presented here which is composed of two aspheric surfaces and two spherical surfaces. The entrance pupil diameter is 290 mm and the stop is located at the primary mirror. The effective focal length is 900 mm. The strip field of view for the telescope is 15 degrees x 0.2 degrees and if the telescope is launched into an orbit about 400 km altitude, the observed range width will be more than 105 km within a scene without any other auxiliary scanning instrument. The spectral range can be as wide as from visual wave band to infrared wave band in the mirror system. This telescope can be used for environmental monitoring with different detectors whose pixel is adapted to the optical resolution. In this paper, the spectral range is chosen as 3.0 -5.0 mu m, and center distance of the pixel is 30 mu m. And the image quality is near the diffraction limit.
- 出版日期2012-9
- 单位复旦大学; 中国科学院上海技术物理研究所; 济宁医学院
