Method and apparatus for laser shock wave three dimensional highly false proof nondestructive marking
A shock wave and laser technology, used in laser welding equipment, welding equipment, metal processing equipment and other directions, can solve the problems of poor anti-counterfeiting performance, unevenness, complicated operation, etc., and achieve the effect of non-destructive and high anti-counterfeiting.
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[0020] The details and working conditions of the specific device proposed by the present invention will be described in detail below with reference to FIG. 1 .
[0021] The device comprises a laser generator, a beam spatial modulator (1), a liquid crystal mask (2), a lens (3), a part (4), and a control system. The laser beam spatial modulator consists of a concave lens, a convex lens and a homogenizer.
[0022] According to the size and material of the marked area of the part, select a flexible film and stick the flexible film on the surface of the part; according to the requirements of the logo, draw a pattern with grayscale, display the pattern on the LCD screen to form a liquid crystal mask, and The liquid crystal mask is controlled by the computer to realize fast pattern transformation; the laser generator generates laser pulses with an energy of 10-100 joules and a duration of 8-80 nanoseconds. The light spot mode can be fundamental mode, multi-mode and other modes. T...
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