Laser angle measurement optical lens and optical receiving system

Abstract

The invention provides a laser angle measurement optical lens and an optical receiving system. The laser angle measurement optical lens is arranged on the front side of a detector, is used for focusing an incident light beam, and comprises an optical hood, a first lens and a second lens which are sequentially and coaxially arranged along the transmission direction of the incident light beam. The aperture of the first lens is 20 mm, the center thickness of the first lens is 5.5 mm, and the distance between the first lens and the second lens is 1 mm. The first lens comprises a first surface anda second surface, the curvature radius of the first surface is 17.885 mm, and the curvature radius of the second surface is 45.5 mm; the aperture of the second lens is 15mm, the central thickness of the second lens is 3mm, and the distance between the second lens and the detector is 3.5 mm; and the second lens comprises a third surface and a fourth surface, the curvature radius of the third surface is 40.5 mm, and the curvature radius of the fourth surface is infinity. The laser angle measurement optical lens and the optical receiving system provided by the invention can receive weak laser reflected by a long-distance high-sensitivity target in a diffuse manner, and are simple and compact in structure, small in size, light in weight and low in cost.

Description

technical field [0001] The invention relates to the technical field of laser angle measurement, in particular to a laser angle measurement optical lens and an optical receiving system including the laser angle measurement optical lens. Background technique [0002] The laser beam has strong directionality, extremely small divergence angle, narrow beam, and highly concentrated energy in space and frequency spectrum, so the laser angle measurement has a long distance, high precision, and strong anti-interference ability. Laser angle measurement uses a laser target indicator to aim at the target to emit a laser beam, and the optical lens receives the diffusely reflected laser light from the target to the four-quadrant detector to obtain target angle information. [0003] Therefore, the optical lens and its optical receiving system are one of the important components of laser angle measurement, which can control the uniformity and size of the converged spot, the transmittance, a...

AI Technical Summary

Problems solved by technology

At present, when the commonly used angle-measuring laser optical system is used for long-distance angle measurement, due to the weak diffuse reflection echo signal, more optical lenses are needed for focusing, which will lead to a large system size and heavy weight. Aspheric lenses are used Although the number of lenses can be reduced, the processing cost is higher

In practical application, it seriously affects the size, weight and cost of the angle measurement system

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