Long-focal-length large-aperture laser guide lens based on four-quadrant detector

Abstract

The invention relates to a long-focal-length large-aperture laser guide lens based on a four-quadrant detector. The long-focal-length large-aperture laser guide lens is characterized in that an optical system of the lens comprises a meniscus positive lens A, a meniscus positive lens B, a biconcave lens C, a color filter D and a biconvex lens E, which are sequentially arranged in the incident direction of light from front to back. The air gap between the meniscus positive lens A and the meniscus positive lens B is 1.15 mm; the air interval between the meniscus positive lens B and the biconcavelens C is 8.15 mm; the air interval between the biconcave lens C and the color filter D is 8.25 mm; and the air interval between the color filter D and the biconvex lens E is 1.93 mm. The lens adoptsone aspheric lens, so that the structure is compact; light spots are uniform, the performance of each field of view is consistent under the conditions that the focal length reaches 48.7 mm and the aperture reaches 0.8; and the optical passive athermalization design is realized, the processing difficulty and the adjustment difficulty are low, the aspheric surface type manufacturability is good, anda guarantee is provided for batch equipment.

Description

technical field [0001] The invention relates to a long-focus-length and large-diameter laser guiding lens based on a four-quadrant detector, which belongs to the field of optoelectronic technology. Background technique [0002] With the rapid development of science and technology, traditional weapon systems must keep pace with the times, get rid of the combat mode of winning by quantity, and improve strike accuracy. The four-quadrant detection and guidance system belongs to active energy non-imaging detection. Its working process is to use an independent laser transmitter to irradiate a specific target, and then the guidance lens receives the laser echo reflected by the target, and the four-quadrant detector will receive the optical signal It is converted into an electrical signal, and according to the energy difference of the electrical signal in the four quadrants, the target position is calculated and the flight attitude is adjusted, that is, guidance. The photoelectric ...

AI Technical Summary

Problems solved by technology

At present, the laser guidance system based on the four-quadrant detection system in China has the problems of small light flux, short detection distance, and uneven spot in the linear area. The development of a guidance lens with a large amount of light, a long focal length, uniform light spot in the linear area, and accurate positioning is the key to laser guidance. direction of development

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