Dodging special-shaped lens used for shaping semiconductor laser leams, dodging laser source and optical system

Abstract

The invention provides a dodging special-shaped lens used for shaping semiconductor laser leams. The lens comprises an entrance face receiving laser injection and an exit face allowing laser ejection, the entrance face which is a half-cylindrical curved surface and the exit face which is an aspheric surface are arranged oppositely, and the distance between two ends of a generatrix of the aspheric surface is larger than that of the half-cylindrical surface, so that lasers injected through the entrance face are enabled to be wholly injected onto the exit face. The dodging special-shaped lens is simple in structure, easy for batch processing, low in cost and especially capable of well realizing adjusting of divergence angles of laser beams output by semiconductor lasers of various wavelengths and homogenized adjusting of Gaussian curve distribution of light energy output by lasers, and utilization rate of laser energy is improved while good dodging and aberration-eliminating performances are provided.

Description

technical field [0001] The invention relates to laser optics, in particular to a uniform light special-shaped lens for shaping semiconductor laser beams, a uniform light laser light source and an optical system. Background technique [0002] At present, the beam output by the semiconductor laser LD as the light source has different divergence angles in the horizontal and vertical directions of its cross-sectional spot, that is, the horizontal divergence angle θ∥ in the horizontal direction and the vertical divergence angle θ⊥ in the vertical direction. When in use, it usually only intercepts the central spot, and the loss of light energy is relatively large. Because the semiconductor laser is distributed in a Gaussian curve, after general optical collimation or beam expansion, the light energy distribution of the spot is not uniform, which affects the application of the semiconductor laser in the field of uniform light field, especially the photoelectric detection and other ...

AI Technical Summary

Problems solved by technology

[0003] For the existing semiconductor laser light sources, general-purpose spherical lenses or lens groups are usually used for optical processing. The disadvantages are: 1) The ordinary spherical lens is used to process the semiconductor laser light source for beam expansion, and its light field uniformity is poor; Straight, the imaging quality of point light sources is only suitable for general marking application products, and cannot meet the application requirements of precision measuring instruments

2) In order to achieve a certain imaging effect, multiple spherical lenses are used in combination, not only the optical power loss is relatively large, but also it is difficult to eliminate aberrations

3) Although the traditional spherical glass lens is easy to process in batches, the processing process is long, such as rough grinding, fine grinding, polishing, etc., with many processes, many materials, high cost, large accumulation of assembly errors, and poor product quality stability

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