A laser power detection device

Abstract

The invention discloses a power detection device of a laser device. The power detection device comprises a power detection component which is composed of a light reflecting plate and a laser power detector. The light reflecting plate reflects the laser emitted by the laser device to the laser power detector to perform power detection. The light reflecting plate periodically reflects the laser beams of the laser device so that the laser power detector is enabled to periodically receive the laser reflected by the light reflecting plate. The power detection device of the laser device has low production cost, high detection value stability and high accuracy.

Description

technical field [0001] The invention relates to the field of laser detection equipment, in particular to a laser power detection device. Background technique [0002] The rated power of the semiconductor laser is an important indicator of the laser process parameters. Only the appropriate laser power can ensure the stable operation of the laser and the optical system for a long time, and it is also the decisive factor for achieving the best processing quality. In the existing laser detection methods, generally By selecting a lighting sheet, a small part of the laser light is reflected to the laser detector, and the linear relationship in the laser detection is prevented from interfering with strong light through the amplification effect. In the existing technology, it is generally selected to filter other stray light and pass through The light-transmitting plate with 1% laser reflects the intercepted less than 1% of the laser light into the laser detector to avoid the interf...

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Problems solved by technology

[0002] The rated power of the semiconductor laser is an important indicator of the laser process parameters. Only the appropriate laser power can ensure the stable operation of the laser and the optical system for a long time, and it is also the decisive factor for achieving the best processing quality. In the existing laser detection methods, generally By selecting a lighting sheet, a small part of the laser light is reflected to the laser detector, and the linear relationship in the laser detection is prevented from interfering with strong light through the amplification effect. In the existing technology, it is generally selected to filter other stray light and pass through The light-transmitting plate with 1% laser reflects the intercepted less than 1% of the laser light into the laser detector to avoid the interference of other strong light. Due to the high technical requirements of the light-transmitting plate, the equipment manufacturing cost is high, and its The surface of the light-transmitting plate splits the light through the coating or the arrangement angle of the prisms. The coating tends to decrease steadily under long-term laser irradiation. In addition, the prism needs to be installed at a specific angle to split the laser light. The angle has high precision requirements. When determining the laser interception rate, repeated trials are required to determine the installation angle. When in use, both the laser head and the prism are prone to offset, resulting in a change in the laser interception rate, which in turn leads to inconsistent detection results. Inaccurate, which leads to low stability of the light-transmitting plate, and it is easy to cause deviations in the detection data when the stability of the light-transmitting plate decreases, and it does not have self-test capability

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