A three-dimensional adjustable laser beam expander focusing device

Abstract

The invention provides a three-dimensional adjustable laser beam expanding and focusing device. The device comprises a first lens arm, a second lens arm, a third lens arm and a fixing plate; the middle area of the fixing plate is an electromagnet, the first lens arm is directly mounted and fixed on the fixing plate through nuts, the second lens arm is connected with the fixing plate through magnetic force, the position of the second lens arm can be adjusted in an electromagnet region, the third lens arm moves in an arc groove at one side of the outer edge of the fixing plate under the assistance of gear engagement and is locked and fixed by the nuts after being determined, telescopic rods are respectively arranged on the three lens arms so as to carry out axial movement of the lens arms, meanwhile, the lens can rotate in the circumferential direction of the lens arms, so that three-dimensional adjustability is realized. According to the three-dimensional adjustable laser beam expandingand focusing device, the lens position can be adjusted to overcome the manufacturing error of the lens, so that the laser beam can be subjected to beam expanding and focusing at the maximum efficiency, the laser energy loss can be reduced, and the generation range of the laser focal point can be expanded.

Description

technical field [0001] The invention relates to the field of optical and mechanical design, in particular to a three-dimensional adjustable laser beam expander focusing device. Background technique [0002] In laser processing applications, different occasions have different requirements for laser beam quality, especially laser cutting and laser marking have extremely strict requirements on beam quality. In order to obtain high-quality laser beams, a laser beam expander system is required. To achieve a better focusing effect, the purpose of expanding the beam is to obtain a smaller spot. The commonly used methods of beam expansion are the Galileo method and the Kepler method. The Galileo beam expander usually includes an input concave lens and an output convex lens. The Kepler beam expander generally has a convex lens as the input lens to focus the real focal length beam sent to the output element. [0003] The current beam expander focusing mirror will cause the loss of l...

AI Technical Summary

Problems solved by technology

[0003] The current beam expander focusing mirror will cause the loss of laser energy due to the manufacturing error and assembly error of the lens and affect the accuracy of the focus point, which will bring uncertainty to the actual laser processing process, and the range of laser focus generation is limited.

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