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Selective photothermal decomposition(Selective Photothermolysis)As early as 1983, a scientific paper published by two scholars, Anderson and Parrish, proposed "selective photothermal decomposition". This is a very important concept for the development and application of laser in dermatology.

Ultraviolet disinfection methods and precautionsUltraviolet lamps are commonly used in medicine, drinking water and food, and are increasingly used in the home. The UV disinfection lamp radiates UV rays with a wavelength of 253.7nm. The ultraviolet band has the strongest sterilization ability, which can be used for disinfection and sterilization of water, air, clothing, etc. The commonly used UV disinfection lamps in pig farms have specifications of 15W, 20W, 30W and 40W, and the use voltage is 220V.

Laser engraving machine in the process of the use of skillsBefore starting work, you should carefully check the spelling of the text portion of the engraving project, and if conditions permit, print the contents and confirm with the customer. If you want to avoid the dislocation of the sculpture in the process of engraving, you need to do a good job of prevention, and implement the corresponding solution when the dislocation problem occurs.Error checking:a. Check whether the pliers or clamp used for engraving are wrongb. Whether the pliers or clips are wornc.

The reason why the laser head of laser engraving machine does not glowIn the daily use of laser engraving machine, it is often encountered that the laser head of the laser engraving machine does not glow. This article briefly introduces how to deal with the laser head of the laser engraving machine.1.

A key query is how to make sure "fast enough", that is, what elements affect switching off the tube rapidly to keep away from the penalties of inductance saturation? This may also be the last determinant of the quantity and charge of the inductor, so it is vital to have a exact appreciation of the response time issue.1. All present day limiting loops require a positive time response.

What is the principle of pulsed strong light sterilizationPulsed strong light is the synergistic action of visible light, infrared light and ultraviolet light on microorganisms, which can destroy the cell wall and nucleic acid structure of microorganisms, thus killing microorganisms. Pulsed strong light has obvious bactericidal effect on mold, gram-positive pathogenic bacteria, Gram-negative pathogenic bacteria, aerobic bacterial spores and fungal conidia, Staphylococcus aureus, Bacillus subtilis, yeast and so on.

Why does melt-blown cloth need static electret equipment?01 Why does melt-blown cloth need static electret equipment?Electret electrostatic adsorption is to capture coronavirus droplets through the coulomb force of charged fibers.

Laser cutting machine equipment common faults and solutions1, boot without any response▶ Power fuse is burnt out: Replace the fuse.▶ Power input is normal: Check power input and make it normal.▶ Main power switch is damaged: Replace the main power switch.2, no laser output or very weak laser▶ Optical path offset: Carefully adjust the optical path.▶ Contaminated or damaged reflector lens: Clean or replace reflector lens.▶ Whether the focal length of the device is changed: readjust the focal length.▶ Focusing mirror is contaminated: Clean the focusing mirror.▶ Cooling water quality or temperatur

Why the laser is weak or has no laser outputWhether the focusing mirror is contaminated: Clean the focusing mirror.Whether the focal length of relief engraving machine equipment changes: readjust the focal length.Whether the optical path is offset: Adjust the optical path carefully.Whether the reflector is contaminated or damaged: Clean or replace the reflector.Whether the laser power supply is powered on: Check the power supply loop of the laser power supply to make it normal.Whether the laser tube is damaged or aged: Replace the laser tube.Whether the laser power supply is damaged: Replace t

Design and implementation of semiconductor laser power supplyIn order to improve the stability of the optical power output of the semiconductor laser and ensure the safe and reliable operation of the laser, the semiconductor laser power supply can be designed according to the following introduction. The main circuit of driving power adopts synchronous DC/DC mode, which has high output efficiency. The driving circuit can generate 200kHz trigger pulse, which can reduce the ripple of output current and ensure the stability of the output power of the laser.