Gear-driven automatic precision focusing mechanism of beam expander

Abstract

The invention discloses a gear-driven automatic precision focusing mechanism of a beam expander. The gear-driven automatic precision focusing mechanism comprises a beam expander main body part and a beam expander seat, wherein a beam expander external fastening part is arranged on the beam expander seat. The gear-driven automatic precision focusing mechanism is characterized in that: a beam expander pressing plate is fastened at the upper end of the beam expander main body part; the beam expander pressing plate is pressed against the beam expander external fastening part from the side upper part; an outer ring of a beam expander rotary fastening sleeve fastens a bull gear; the interior of the beam expander rotary fastening sleeve is in coaxial fastening connection with a beam expander focusing part regulating sleeve; a stepping motor seat is fixed on the beam expander seat; a stepping motor is fixed on the stepping motor seat; a pinion is fixed on a stepping motor shaft; a triggering sheet is fixed on a sleeve fastening pressing ring; the triggering sheet is connected with the beam expander focusing part regulating sleeve; a photoelectric interrupter is fastened on a sensor seat; and the sensor seat is fastened on the beam expander seat. The gear-driven automatic precision focusing mechanism of the beam expander is simple and compact in structure, small in occupation space, accurate in repeated positioning and easy in adjustment and maintenance; and the operating safety environment of a laser operator is greatly improved.

Description

technical field [0001] The invention relates to a mechanism for automatically and precisely focusing a beam expander by using a gear 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 instrument, be...

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 long-term 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 focal length 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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