Laser welding machine mirror maintenance and convex lens imaging law


 Laser welding machine belongs to 4 types of laser equipment. Direct strong laser irradiation can cause serious damage to human skin, and more serious, blind eyes. The debugging operator must have common sense of laser safety protection, and must wear it during work Special laser protective glasses with corresponding laser wavelength. Note: The adjustment of the laser must be carried out by specially trained personnel, otherwise it will cause damage to other components on the optical path due to laser misalignment or polarization adjustment.

  The adjustment steps of the laser resonator are as follows:

  1. Check the reference light source


  2. Adjust the position of the half mirror

  3. Check the installation position of the YAG rod

   manual rotation Reflect the lens holder, push the shutter to the design position of the light blocking lens, observe whether the red light is in the middle of the lens, and whether the reflected light is on the absorption cone in the center of the beam terminator. If the position is not correct, you can adjust it slightly. Finally, Special attention should be paid to carefully check whether the reflective lens of the shutter is clean. The contaminated lens will explode quickly during use. At this point, the adjustment of the laser part is complete.

   (1) In order to ensure that the laser is always in a normal working state, after two weeks of continuous operation or when it is not used for a period of time, first deal with the laser module and dielectric diaphragm before starting the machine Check the components in the optical path such as lens protection glass and confirm that there are no abnormal phenomena such as dust pollution and mildew on the optical components. If the above phenomena occur, they should be dealt with in time. The laser lens ensures that the optical components will not be damaged under strong laser irradiation. (If the operating environment of the equipment is relatively clean, the above inspection can be extended to one month or even longer accordingly)

  (2) Equipment operators can often check the laser output with black paper If spot unevenness or energy drop is found, the resonant cavity of the laser should be adjusted in time to ensure the beam quality of the laser output.

   (3) The purity of the cooling water is the key to ensuring the laser output efficiency and the life of the laser concentrating cavity components. The conductivity of the internal circulating water should be checked once a week during use. To ensure its conductivity of 30.5MW·cm, the internally circulating deionized water must be replaced once a month, and the conductivity of the newly injected pure water high-power laser mirror group must be 32MW·cm. Observe the color change of the ion exchange column in the cooling system at any time. Once the color of the resin in the exchange column changes to dark brown or even black, the resin should be replaced immediately.

  1. The lens is represented by the lens symbol (a line segment has two V-shaped signs at both ends), draw the main optical axis, mark the optical center and focus according to the lens The intersection of two refracted rays of the three special rays (generally the rays passing through the optical center and the rays parallel to the main optical axis are better), the characteristics of the image formed by the lens (such as virtual reality, size, front and back Wait).

  2. When the lens is imaging, all the light from each point on the object that hits the lens is imaged at the same mirror position, blocking a part, and does not affect the direction of the shot The other light of the lens is formed, so the complete image can still be seen, but the brightness of the image on the screen will be darker because the light on the image is reduced.

  3. Convex lens imaging law:

  (1) A condition that the convex lens needs to be met is (u>f ).

  (2) Conjugate imaging means that the object distance and the image distance can be interchanged. In the two cases, it becomes an enlarged and reduced inverted real image.

  4. Looking at a clock outside of the double focal length through a convex lens, the image of the second hand still rotates clockwise, because it is an inverted real image. It is the normal direction, so it still rotates clockwise.

   Shenzhen Wangxinsheng Technology Co., Ltd. is a professional factory that develops and produces high-power laser (laser) lenses, dichroic lenses, laser mirrors, and beam splitters. It is especially good at high-power laser fiber cutting machines, The protective lens, focusing lens and collimating lens of the laser welding machine, the power range is 500W-8000W. The factory is located next to the Guanlan Golf Club, Baoan District, Shenzhen, with an experienced Ru0026D and production team. The equipment includes Taiwan Maijun polishing machine, Korean Era Seiko edging machine, Japanese new Coron coating machine, glass cutting machine, ultrasonic, American LAMBDA950 spectrophotometer (measuring range 175nm-3500nm), interferometer, eccentric meter, etc. With complete production technology and professional testing capabilities, rigorous technical processes and strict quality management system guarantee the excellence of the quality of optical lenses.

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