论文部分内容阅读
本文针对空间光学系统轻型特点，设计了一个二元光学折／衍混合红外反射式望远系统。采用了离轴式格里高利（Ｇｒｅｇｏｒｉａｎ）结构形式，消除了望远系统中的中心遮拦问题。用衍射光学元件校正系统象差，使反射面为球面，二元光学表面尺寸比施密特（Ｓｃｈｍｉｄｔ）校正板（位于入瞳处）缩小于３～４倍，光学设计运用ＯＳＬＯ软件，光学系统的通光孔径φ＝１２０ｍｍ，焦距ｆ＝－１０００ｍｍ，波长λ＝４．３μｍ，视场２ω＝２°×６°（子午×弧矢），分辨率Ｒｅｓ＝０．０５ｍｍ，ＭＴＦ≥０．４（空间频率ｆｒｅ≤１０ｃ１／ｍｍ）。
Aiming at the light characteristics of space optical system, this paper designs a binary optical folding / diffractive infrared reflection telescope system. The off-axis Gregorian structure is used, eliminating the problem of center obscuration in a telescopic system. Using the diffractive optical element to correct the system aberration so that the reflecting surface is spherical, the size of the binary optical surface is reduced by 3 to 4 times than that of the Schmidt correction plate (located at entrance pupil). The optical design uses OSLO software, optical system The aperture φ = 120mm, focal length f = -1000mm, wavelength λ = 4.3μm, field of view 2ω = 2 ° × 6 ° (meridian × sagittal), the resolution Res = 0.05mm, MTF ≥ 0.4 (Space frequency fre ≤ 10c1 / mm).