Light beam position adjusting device

Abstract

The invention discloses a light beam position adjusting device. The light beam position adjusting device comprises a base, a first plane mirror, a second plane mirror, a third plane mirror, a fourth plane mirror and a moving mechanism for driving one of the four plane mirrors to move in the X-axis direction. The reflecting surface of the second plane mirror is opposite to the reflecting surface ofthe third plane mirror, the reflecting surface of the first plane mirror is parallel to and opposite to the upper part of the reflecting surface of the second plane mirror, and the reflecting surfaceof the fourth plane mirror is parallel to and opposite to the upper part of the reflecting surface of the third plane mirror. According to the light beam position adjusting device provided by the invention, on the basis of not changing the direction of a light beam, the emitting position of the light beam is adjusted, and the problem of coupling of position adjustment and pointing adjustment is avoided; besides, the light beam position adjusting device is compact in structure, can be used after being directly inserted into a light path, does not need to change the original light beam structure layout, and is convenient and easy to implement.

Description

technical field [0001] The invention relates to the technical field of laser wavelength beam combining, and more specifically, to a beam position adjustment device. Background technique [0002] In the field of laser wavelength combining, the pros and cons of multi-channel laser beam combining are generally evaluated by two indicators: pointing deviation and position deviation. Pointing deviation refers to the angle difference between the laser propagation direction and the reference direction, which reflects the non-parallel degree of the laser and the reference; position deviation refers to the position difference between the laser and the reference center on a certain section, which reflects the laser The degree of misalignment between the position and the reference position. If there is a large pointing deviation between the two laser beams, their position misalignment will increase with the increase of the laser action distance. But if the two laser beams are strictly...

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Problems solved by technology

[0003] In the prior art, electric devices for beam pointing adjustment, such as two-dimensional swing mirrors and fast mirrors, are relatively common, and in some applications that require high beam combining accuracy, the correction requirements for beam combining laser position deviations are also the same. It is extremely high, but the special position deviation adjustment device is very rare, especially the electric device used to adjust the position deviation adjustment of the high and low direction of the combined beam without greatly changing the center height of the optical path; some occasions use two-dimensional pendulum mirror to realize the adjustment of the position deviation of the beam, but another set of two-dimensional swing mirror must be added at the rear end to perform secondary compensation for the change of the beam pointing. Complicated, which increases the burden on the control unit; in addition, the adjustment amount of the position deviation is directly determined by the optical distance between the two sets of swing mirrors when the stroke of the swing mirror is fixed. Therefore, this method is not suitable for strictly limited space arrangement. Occasion application

[0004] In addition, in the prior art, there is also a method of accurately adjusting the positions of the light guide mirror and the beam combining mirror in the installation and adjustment stage to achieve accurate correction of the position deviation of the multi-channel lasers; And this method does not have the adjustment link of position deviation, and it cannot automatically compensate the position deviation caused by changes in temperature and stress.

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