Laser proportional angle measurement optical system

Abstract

The invention discloses a laser proportional angle measurement optical system, which comprises a laser narrow-band filter lens and three high-refractive-index positive lenses, wherein the number of the laser narrow-band filter lens is one, the number of the high-refractive-index positive lenses is three, the three high-refractive-index positive lenses are sequentially arranged on one side of the laser narrow-band filter lens, and each high-refractive-index positive lens sequentially comprises a meniscus positive lens body, a meniscus positive lens body and a plano-convex positive lens body. The laser proportional angle measurement optical system has an ultra-large relative aperture and extremely high light gathering capacity, and is large in linear proportion area range and good in proportion characteristic.

Description

technical field [0001] The invention belongs to the field of optical systems, in particular to a laser proportional angle measuring optical system. Background technique [0002] In existing life, the laser proportional angle measurement optical system is mainly used to accurately measure the angle of the infinite laser point source relative to the visual axis of the detection system. The optical system receives the optical radiation of the long-distance laser point source and focuses on the four-quadrant detector. Each quadrant of the detector can receive light radiation and linearly convert it into a voltage or current value, and then obtain the coordinate position of the center of the spot in the four-quadrant detector through the proportional operation of the four quadrants, and then Converted to the included angle of the visual axis by the optical system. [0003] However, the angle and the coordinate position calculated by the four-quadrant detector need a good linear ...

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Problems solved by technology

[0003] However, the angle and the coordinate position calculated by the four-quadrant detector need a good linear relationship to ensure that the system has sufficient angle measurement accuracy. The key is the design of the light energy distribution in the laser spot dispersion circle. When the angular optical system is used, it lacks a super large relative aperture, resulting in low light gathering ability, and its linear proportional area range is small, and the proportional characteristic is poor

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