Optical design of common path for laser receiving/visual collimator

To realize the correction of the optical axis and satisfy the requirement for miniaturization and lightweight, a laser/visual sighting telescope system was designed, which had the common path with laser receiving and visual collimator. By means of shared telephoto objective and coating beamsplitting film on inclined plane of the block prism, the system was applied to opticelectronic observatory, with visual correction of optic axis and laser receiving. The magnification of the visual sighting telescope is 7×, the field of view (FOV) is 5°, the exit pupil diameter is 3.7 mm, and the exit pupil distance is not less than 20mm. The laser receiving system has the FOV of 1mrad and the entrance pupil diameter of 50 mm. The designed results meet the index requirments.