Working voltage of laser pointer

Compared with the red laser with the same output power level, this green laser pointer obtains a high-quality red reference line, with higher beam visibility and higher brightness. LASER is the acronym for the English expression Light Amplification by Stimulated Emission of Radiation, which means "light amplification by stimulated radiation." A laser pointer store was therefore the first to be an optical amplifier, which was discovered by Einstein based on a physical principle: stimulated emission. Therefore, this kind of laser pointer is more suitable for longer test distance and high level of test accuracy and precision. If you have ever participated in a vigil by an amateur astronomer (for example, on a traditional starry night), you will undoubtedly see an animator using a green laser pointer (it is the best color for the retina persistence index) with its explanation.The output power produced by the same laser is different, the power supply used is also different, not to mention the difference in the quality of the green light diode, the lifespan of some laser pointers may be very different.

We have already seen that an atom can absorb a photon to be "excited" and then emit a photon with energy hn = DE to be excited. This photon emission is called spontaneous emission. It can occur at any time and is isotropic (that is, the emitted photons have no specific direction in space). There are various red, green, blue and infrared laser pointers on the market. Basically, high power laser pointer can be divided into diode lasers and DPSS laser light-emitting gadgets. The following is a general analysis of green laser pointers and red laser pointers with different manufacturing structures. Compared with the 200mw long-distance visible laser pointer that is usually used as a green, red or blue laser, these laser pointers have lower production costs and are not only made by simple processes. The human eye can clearly see the visible laser. However, thermal radiation is a method of detecting the presence of laser light. A typical cheap laser pointer burns after less than 100-500 hours of use, while the standard life of a high-quality laser pointer is more than 5000 hours.