Warnings for laser pointers in some places
Many people now like to use the portable laser pointer as a toy. This kind of device is also often used in occasions such as speech. The US Food and Drug Administration (FDA) recently issued a warning through the MedWatch system that laser light emitted by a handheld laser pointer may be harmful to the eyes. However, there are still many people who suffer eye damage due to the laser beam emitted by the laser pointer. The US FDA issued this warning because some irresponsible parents treat laser pointers as toys. There is a high risk. If the child points the laser at the reflective surface, the reflected beam may be stronger than the original beam.
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The high powered laser color controller is used to control the color of the color laser. In the laser demonstration system, simple color control uses the so-called "color adjustment", which is actually a color filter [6]. The three-color filter filters three colors of red, green, and blue respectively. By combining three color filters, seven different colors can be produced. This color controller can only display one color for each graph. Another control method is to use three acousto-optic modulators to modulate three light beams of different colors. This is called the RGB method. The latest laser color controller is the Multicolor Acousto-Optic Modulator (PCAOM) [2] [5], which can simultaneously control eight different laser wavelengths and display millions of colors. Like the RGB controller, it can display different colors in graphics. Its advantage is that it only requires one modulator, simple installation, and high luminous flux.
2021-11-10 12:02:08
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