The manufacturing principle of a green laser pointer

 Background technology introduction

Laser has been widely used in many fields due to its outstanding characteristics such as good directionality, good monochromaticity, high brightness and concentrated energy density. The high powered laser pointer is to use the characteristics of good directionality, good monochromaticity and high brightness of laser. And a tool made to replace the pointer in teaching, so it is also called the laser pointer. The emergence of laser pointers makes it more convenient, flexible and convenient for teachers to use multimedia-assisted teaching activities in the classroom. It completely solves the inconvenience of using mouse pointers in the past multimedia-assisted teaching process. It allows teachers to maximize the advantages of body language and make teaching The process is more vivid and perfect.

What does the brightness of the laser pointer depend on?

From a photometric point of view, the apparent brightness of the light spot irradiated by the laser pointer not only depends on the power of the green light laser pointer and the surface reflectivity of the display screen, but more importantly, it depends on the visual perception of the human eye. In 1924, the International Commission on Illumination, based on the visual function measured by several groups of scientists on more than 200 observers in the 400-750nm spectral range, found that under photopic conditions, the human eye is most sensitive to 555nm green light; in 1951, The International Commission on Illumination has also announced the visual function of scotopic vision. In a dark environment, the human eye is most sensitive to 507nm green light. Other colors are brighter.

About the green laser pointer

Green light pen is the abbreviation of "green laser pen", and can also be called "green laser pen", " red laser pointer", "pointing star pen", "green laser pen" and so on. The green light pen is the most popular laser pointer in the world, because the green light is 6 times brighter than the red light, the beam is more obvious than the red light, and the price is much cheaper than the blue and yellow light. Laser pointer users generally choose the green light pen.

The U.S. market allows 5MW laser pointers

Features The wavelength of the light emitted by the green pen is 532nm, the laser type is Class IIIA, and it uses two AAA batteries. The brightness of the green pen is more objective, so it is more dangerous to the eyes. The higher the power, the more dangerous. Generally speaking, 5mw is commonly used, and the US market allows 5mw laser pointers, and more than 5mw requires special approval.

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