Laser beam expander transposition mechanism

Abstract

The present invention discloses a laser beam expander transposition mechanism. The mechanism comprises a pedestal, the top of the pedestal is provided with a buffer plate, cuboid slide rails are vertically installed at two ends of the left side of the pedestal, leading screws are screwed at the internal portions of the slide rails through screw threads, the top of the buffer plate is provided with a stepping motor, the stepping motor is connected with a transposition plate through a coupling, a splined joint mode is employed between the coupling and the transposition plate, the main shaft of the coupling transversely passes through the transposition plate to connect with a shaft disc fixed part, the disc-shaped shaft disc fixed part is fixed at the right side of the transposition plate through bolts, a trapezoidal beam expander assembling groove is arranged at the front and back sides of the transposition plate, the groove walls of the two sides of the trapezoidal beam expander assembling groove is arc-shaped concave edged, side regulation grooves are arranged at two sides of the trapezoidal beam expander assembling groove, and the side regulation grooves are internally provided with hydraulic expansion screws.

Description

technical field [0001] The invention relates to the technical field of laser beam expanders, in particular to a laser beam expander transposition mechanism. Background technique [0002] Laser has the advantage of strong collimation, and has been widely used in many industries of national economic construction, but laser is parallel light with divergence angle, which makes the laser spot larger when the laser is emitted to a long distance, and the energy per unit area In order to change the laser spot size of the emitted laser beam at a certain position, it is necessary to change the laser divergence angle, so a laser beam expander is designed in the laser emission path. In order to obtain different laser divergence angles, a laser emission Two laser beam expanders are designed in the optical path, one of which is designed as a structure that can change its position. When a large laser divergence angle is required, the laser beam expander is moved out of the optical path. Wh...

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Problems solved by technology

[0002] Laser has the advantage of strong collimation, and has been widely used in many industries of national economic construction, but laser is parallel light with divergence angle, which makes the laser spot larger when the laser is emitted to a long distance, and the energy per unit area In order to change the laser spot size of the emitted laser beam at a certain position, it is necessary to change the laser divergence angle, so a laser beam expander is designed in the laser emission path. In order to obtain different laser divergence angles, a laser emission Two laser beam expanders are designed in the optical path, one of which is designed as a structure that can change its position. When a large laser divergence angle is required, the laser beam expander is moved out of the optical path. When a small laser divergence angle is required Move the laser beam expander into the laser optical path, the simple laser beam expander transposition mechanism uses the combination of the circular stopper on the base of the laser beam expander and the positioning pin to determine the position of the beam expander, so that the laser beam expander In the laser emission system, the optical axis of the beam expander coincides with the optical axis of the laser emission system. The advantage of this transposition method is that the structure is simple, but the positioning accuracy of the beam expander is limited by the size accuracy of the circular stopper and the positioning pin. The accuracy is low, and most of the transposition mechanisms can only achieve one specification of beam expander transposition

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