Laser marking machine (old-fashioned semiconductor) dimming steps, methods and techniques

Laser marking machine (old-fashioned semiconductor) dimming steps:

The first step: the purpose of adjusting the red light is to adjust the red light level. Hit the center of the small vibrating lens obliquely;

Step 2: Adjust the laser cavity to make the red light pass through the center of the two end faces of the crystal, so as to ensure the reflected light and incident light of the two end faces Coincident together;

Step 3: Adjust the purpose of the half mirror so that the red light passes through the center of the half mirror, and the reflected light coincides with the incident light;

Step 4: Adjust The purpose of the total mirror is to make the red light pass through the center of the total mirror, and the reflected light coincides with the incident light;

Step 5: Adjust the purpose of the beam expander so that the red light passes through the front of the two lenses. Center, to ensure that the reflected light of the two lenses coincide and coincide with the incident light;

Step 6: Adjust the Q switch to make the laser pass through the center of the two ends of the quartz crystal to ensure that the reflected light from both ends coincide , And coincide with the incident light; at this point, the optical path is adjusted, power on, the He-Ne optical axis and the crystal parallelism are good, at this time there should be a YAG laser output, and then use a light multiplier to observe the green light, and carefully adjust All-reflection lens and half-reflection lens make the laser spot round. If the light spot is not round, it needs to be adjusted again. The light spot is relatively round, the green light is the brightest, and the uniform distribution is the best mode. At this time, the laser output quality is the best and the energy is the largest.

Step 7: Adjust the focus lens Purpose: Make the laser pass through the center of the focus lens.

When adjusting the optical path, pay attention to the following issues:

1. When adjusting the frame, the adjustment range should not be too large at one time;

2. When locking the crystal, it is not advisable to use too much force, and the changing state of the red light should be observed at any time;

3. When the current should be adjusted to a lower level, then adjust the light path;

4. If there are special requirements for the beam to be thinner, an aperture can be added between the laser cavity and the half mirror. At this time, the output light will be weakened to varying degrees;

5. Debugging process It is necessary to pay attention that the lens is not polluted by smoke and dust.

【】【】