With auto-focus function, when processing workpieces of different materials and thicknesses, the machine can automatically adjust the focus to the most suitable position quickly. In this way, the processing efficiency of the laser cutting machine can be significantly improved, and the blanking time of the sheet will be greatly reduced. According to the latest research by the World Health Organization, the number of myopia patients in China is as high as 600 million, accounting for almost half of China's total population. Among them, the number of young people with myopia has exceeded 70%. In addition to learning pressure, the biggest reason comes from the harm of electronic screens, which leads to excessive use of myopia.
The amount of energy exerted by the green laser pointer
When irradiated with a high power laser pointer, the principle is first used to cool atoms and rarefied gases. The beam energy is slightly less than the energy required for the atomic transition of one gas atom (such as rubidium gas), when the atoms move faster than the laser atoms in the opposite direction than the other direction. The energy of the laser light is felt higher, so the scattered photons of these atoms and the low energy laser photons absorbed by the high energy are known as the Doppler effect. When phonons in the material are absorbed and the phonon energy is carried away by the emitted photons and there are no other additional heating mechanisms, the temperature of the material drops. In the process, the scattered photons take away excess energy, slowing the atoms down in this direction, so that the temperature of the atomic gas can drop very close to absolute zero. Laser cooling of atomic gases is carried out at the extremely low temperature of Na Kevin (nK).
It is completely different from ordinary LCD TV imaging. The principle of laser TV simulation of natural reflection imaging allows people to see the reflected light on the screen. It is real and natural, without radiation. Solid laser cooling is also called optical cooling. It was first introduced by German physicist Peter Prinsheim. Proposed as early as 1929. The basic principle is that when a laser-cooled material is illuminated with monochromatic light of a specific wavelength, the material absorbs low-energy red green laser pointer photons (long-wavelength photons) and simultaneously emits the same number of high-energy photons (short-wavelength photons) through spontaneous emission—this The process is called upconversion fluorescence or anti-Stokes fluorescence. According to the law of conservation of energy, the emitted high-energy photons need to take away part of the energy from the material, which can be thermal vibrations (phonons) of the material.
