光场多光谱相机像方远心镜头光学设计

Optical design of image telecentric lens for optical field multispectral camera

光场多光谱成像技术具有能够同时获取目标二维空间信息和光谱信息的能力,利用光谱信息可以实现目标的分类和识别。为了快速、便捷地获取空间目标的完整光谱信息,实现目标表面光谱信息的真实记录,基于光场多光谱成像原理,采用光谱分光滤光片阵列分光实现主透镜系统入瞳孔径的分割,设计了一款应用于光场多光谱相机的像方远心镜头光学系统。光学系统具有宽波段400 nm^1 000 nm,焦距为240 mm,F数为4,全视场15.52°。像质评价与系统公差分析结果表明:设计的光场多光谱相机的像方远心镜头可以满足实际加工以及正常使用要求。

The optical field multispectral imaging technique has the ability to simultaneously acquire the target two-dimensional spatial information and spectral information, and the classification and recognition of the target can be achieved by using the spectral information. In order to obtain the complete spectral information of the spatial target more quickly and conveniently, and realize the real record of the target surface spectral information, based on the principle of optical field multispectral imaging, the segmentation of the entrance pupil aperture for the main lens system was realized by adopting the array beam split of the spectral beam split filter, and an image telecentric lens optical system for optical field multispectral camera was designed. In this optical system, the wide band ranges from 400 nm^1 000 nm, the focal length is 240 mm, the F-number is 4,and the full field of view angle is 15.52°. The analysis results of the image quality evaluation and system tolerance show that the designed image telecentric lens for the optical field multispectral camera can satisfy the requirements of practical processing and normal use.