Laser micro-nano processing split-pupil differential confocal online monitoring integrated method and device
A differential confocal, micro-nano processing technology, applied in measurement devices, optical devices, laser welding equipment, etc., can solve problems such as only 2 microns, solve online detection problems, improve controllability, and solve drift problems and effects of high precision real-time fixed focus problems
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Embodiment 1
[0045] Such as figure 1 , using the split-pupil differential confocal axial monitoring module 1 to monitor the surface position of the sample 9 before processing and the axial position of the sample 9 during processing, the computer 30 monitors the two-dimensional scanner 18, the precision table 10, the axial The scanner 8 performs feedback control to realize three-dimensional scanning and position adjustment of the processing and monitoring of the sample 9;
[0046] The split-pupil differential detector 14 is composed of a spot magnifying objective lens 25 and a two-quadrant detector 29 . The implementation steps of the integrated method of laser micro-nano processing and laser split pupil differential confocal online monitoring are as follows:
[0047] 1) Place the sample 9 on the precision workbench 10, and the precision workbench 10 drives the sample 9 to perform scanning motion;
[0048] 2) Before processing, use the split-pupil differential confocal axial monitoring mo...
Embodiment 2
[0056] Such as figure 2 As shown, the sub-pupil differential detector 14 is composed of a spot magnifying objective lens 25, a detection CCD26, a first detection area 31 and a second detection area 32, wherein the first detection area 31 and the second detection area 32 are located on the image plane of the detection CCD26 above, and symmetrical about the optical axis; when using the split-pupil differential confocal axial monitoring module 1 to monitor the axial position and axial size of the sample 9 during processing, the axial monitoring parallel beam 4 passes through the dichroic mirror A5 After reflection and transmission by the dichroic mirror B6, the objective lens 7 is focused on the sample 9, and the reflected axial monitoring beam 11 reflected by the sample 9 is converged on the detector CCD26 by the reflector 12, the detection objective lens 13, and the spot enlargement objective lens 25 , the signals obtained from the first detection area 31 and the second detect...
Embodiment 3
[0059] Such as image 3 As shown, the laser space-time shaping module 16 is composed of a space shaper 34 and a time shaper 35, and adjusts the time-domain and space-domain parameters of the light beam emitted by the femtosecond laser 15, so as to optimize the femtosecond laser processing performance.
[0060] All the other are identical with embodiment 1.
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