Automatic precise focusing mechanism for beam expanding lens adopting synchronous belt transmission

Abstract

The invention discloses an automatic precise focusing mechanism for a beam expanding lens adopting the synchronous belt transmission, which comprises a beam expanding lens main body part and a beam expanding lens seat and is characterized in that the beam expanding lens seat is in vertical placement, an external fastening part of the beam expanding lens is placed on the beam expanding lens seat, a press plate is fixedly arranged above the external fastening part of the beam expanding lens, a step motor is fastened on a step motor seat, a synchronous belt small wheel is fastened on a step motor shaft, an inner ring of a beam expanding lens rotation fastening sleeve barrel is coaxially fastened and connected with a focusing part regulating sleeve barrel of the beam expanding lens, an outer ring of the beam expanding lens rotation fastening sleeve barrel is coaxially fastened and connected with a synchronous belt large wheel, the step motor drives the synchronous belt small wheel, a triggering sheet is fastened on the beam expanding lens rotation fastening sleeve barrel, a photoelectric interrupter is fastened on a sensor seat, and the sensor seat is fastened on the beam expanding lens seat. The beam expanding lens automatic precise focusing mechanism has the advantages that the structure is simple, the repeated positioning is accurate, the regulation and the maintenance are easy, the work environment safety of laser operators is greatly improved, and the beam expanding lens automatic precise focusing mechanism is widely applicable to the field of laser processing adopting beam expanding lens mechanisms.

Description

technical field [0001] The invention relates to a mechanism for automatically and precisely focusing a beam expander by using a synchronous pulley transmission mechanism, which replaces manual focusing, and belongs to the technical field of laser processing. Background technique [0002] In laser processing or other fields, we pursue lasers that can maintain a perfectly calibrated beam, but due to the existence of the divergence angle, it is impossible to fully realize it. Because expanding the diameter of the laser beam can reduce the far-field divergence angle, a better The collimation effect, so the beam expander that can realize the collimation and expansion of the laser beam is an optical component widely used in the field of laser collimation. [0003] The existing beam expander is basically manually adjusted, the front end adjusts the spot diameter, and the rear end adjusts the focal length. In laser processing equipment, after the beam expander is installed on the i...

AI Technical Summary

Problems solved by technology

In laser processing equipment, after the beam expander is installed on the instrument, because the focal length adjustment is maintained by damping, after a long time of use, the focus will drift due to instrument vibration and other reasons, which will have a great impact on the processing accuracy. It is often necessary to disassemble the instrument again, manually adjust the sleeve rotation of the focusing part of the beam expander, and correct the focus position. The energy of the high-power laser is very large, which poses a great potential danger to personal safety. Under the circumstances, the automatic adjustment of the focusing part of the beam expander controlled by the mechanism is very important to improve the working environment and improve the safety of operation.

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