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How is the laser marking machine dimming?

Time:2018-05-11 18:29:25
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Laser marking machine (semiconductor) light adjustment step:

 The first step is to adjust the red light to the center of the small lens.

 The second step is to adjust the purpose of the laser cavity so that the red light passes through the two ends of the crystal center, so as to ensure that the reflected light of the two ends coincides with the incident light.

 The third step: adjust the purpose of half mirror to make the red light pass through the center of the half mirror, and the reflection light coincides with the incident light. 

The fourth step: adjust the purpose of the full mirror so that the red light passes through the center of the mirror, and the reflected light coincides with the incident light.

 The fifth step is to adjust the purpose of the expansion mirror so that the red light passes through the positive center of the two lenses to ensure that the reflected light of the two lenses coincides and coincides with the incident light.

 The sixth step: the purpose of adjusting the Q switch is to make the laser cross the center of the two end of the quartz crystal to ensure the reflection light overlap and coincide with the incident light. At this point, the light path is adjusted and the power is turned on. The optical axis of the He-Ne is in good parallel with the crystal. At this time, the YAG laser should be transported out, and the green light is observed with the double light plate. Fine adjustment of all anti - lens and semi - reflective lens makes the laser spot round. When the spot is not round, it needs to be adjusted again. The spot is round, green, bright and evenly distributed, which is a good mode. At this time, the laser output quality is good and the energy is large.

 The seventh step: adjust the focusing lens: let the laser pass through the center of the focusing lens.

 When adjusting the light path, we should pay attention to the following questions: 1. when adjusting the mirror frame, the adjustment amplitude should not be too large; 2. when locking the crystal, it should not be too strong and should observe the change state of the red light at any time; 3. should adjust the current when the current is low, and then adjust the light path; 4. if there is a special requirement for the light beam, it can be between the laser cavity and the half reverse mirror. Add the light bar, at this time the output light will be reduced to varying degrees; 5. in the debugging process, we need to pay attention to the lens from smoke pollution.

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