新型大面阵彩色CCD航测相机光学系统设计

Optical system design of new-style large format color CCD aerial photogrammetric camera

介绍了一种有别于传统彩色航测相机的新型大面阵彩色CCD航测相机设计方案,该相机光学系统由Dalsa公司最新生产的6K×8K大面阵彩色CCD作为接收器。通过理论计算和ZEMAX光学设计软件的优化,给出了工作波长适应范围为0.46～0.70μm、焦距为360mm、视场角为10°、相对孔径为1∶4.3的设计实例。设计结果表明,在空间分辨率为83lp/mm时,加入公差后,MTF均值达到0.5以上,光学系统畸变量优于0.06%,完全可以满足高分辨率航测相机对地观测的使用要求。

The design of new-style large format color CCD aerial photogrammetric camera which is different from the traditional one is introduced, this optical system takes a 6K ×8K large format color CCD produced by Dalsa corporation as detector. A design example of a lens whose operating wavelength is from 0. 46～0. 70μm, focal length is 360mm, full field-of-view angle is 10°is given on the basis of the theoretical calculation and the optimization of optical design software ZEMAX. The result of design shows that its MTF exceeds 0.5 after tolerance added when spatial frequency is 831p/ram ,distortion is less than 0. 06%, this kind of optical system can fully meet the demand for the use of high resolution aerial photogrammetric camera.