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Source of electrical noiseNoise is generated when there is a rapid jump in the voltage or current waveform. In a switching power supply, many waveforms are periodic, that is, pulses containing high frequency edges repeat at a predictable pulse repetition rate (PRF). For a rectangular pulse train,…
2023/02/09 13:27
Switch power output protection policyIn all switching power supply designs, protection against load and protection against power supply due to load failure is a very important aspect to be considered in the design. In the design of military products, a kind of work called failure mode and impact…
2023/02/08 13:35
The basic principle of PWM switching power supplyAlthough pulse-width-modulated (PWM) switching power supplies have been around for a long time, they were not widely accepted and used until the mid-1970s. Switching power supplies have many advantages over linear power supplies.For the same power…
2023/02/07 14:54
Various techniques for switching power supplies to reduce lossesThe efficiency of PWM switching power supply without special loss control technology is lower than that of switching power supply with loss control technology. For switching power supplies that have no problem with heat dissipation,…
2023/02/06 13:07
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…
2023/02/03 11:42
Mode of operation of laserThe laser with different wavelength and different output mode will be absorbed by different tissues or substances after entering the skin and thus produce different action modes. These tissues or substances are called Chromophore.Photothermal action refers to the…
2023/02/02 16:06
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. In…
2023/02/01 09:33
The principle of laser generationLASER is written as "Light Amplification by Stimulated Emission of Radiation", which means that by the principle of "excitation emission", the amplification of light waves is generated, which is called "laser". The motion state of electrons can be divided into…
2023/01/31 13:36
Optical terms for cosmetic instrumentsA photon is an elementary particle, a quantum of electromagnetic radiation. In quantum field theory, it's the force carrier that transmits the electromagnetic force.Light spots/spots are few and far betweenLight spot is the contact point of light contact skin,…
2023/01/30 16:03
Distinguish different cosmetic optical instruments and their functionsThere are many different optical instruments on the market, which give off different frequency and characteristics of the radiation wave. We can basically tell by its wavelength, energy, output mode, etc.Ultraviolet…
2023/01/17 14:39
Switch regulator based on LCbuck converters are much like barrel regulators, except that inductors replace resistors and a "new" diode is added. If we can understand the function of the diode, we can understand the basic principle of various power converters more clearly. This diode is called a…
2023/01/14 16:31
Power supply precautions and fault detection methods of laser cutting machineLaser cutting machine power use precautionsLaser cutting machine in the process of use, to the various components of the equipment for good maintenance, to ensure the normal operation of the machine. Laser power supply is…
2023/01/13 15:03
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