Optical design of image telecentric lens for optical field multispectral camera

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.