New methods and new applications of laser rangefinders
Semiconductor lasers are small in size, light in weight, high in reliability, high in conversion efficiency, low in power consumption, simple in driving power supply, can be directly modulated, simple in structure, low in price, safe to use, and have a wide range of applications. Such as optical storage, laser printing, laser phototypesetting, laser ranging, barcode scanning, industrial detection, test and measurement instruments, laser display, medical equipment, military, security, field detection, construction sweepers and marking instruments, laboratories and teaching Demonstration, stage lighting and laser show, laser level and various marking line positioning, etc.
Some unique advantages of semiconductor lasers make them very suitable for various applications, such as field ranging, gun sighting, shooting simulation systems, blinding, submarine communication guidance, fuzes, security, etc. Since it can be driven by ordinary batteries, some portable weapon equipment configurations are possible.
The wavelength bands of semiconductor lasers that have been developed and put on the market include 370nm, 390nm, 405nm, 430nm, 480nm, 635nm, 650nm, 670nm, 780nm, 808nm, 850nm, 980nm, 1310nm, 1550nm, etc., among which 1310nm and 1550nm are mainly used for optical fibers. Communication field. 405nm - 670nm is the visible light band, 780nm - 1550nm is the infrared light band, and 390nm - 370nm is the ultraviolet light band.
Laser safety warnings and usage precautions
Lasers are high-intensity light source radiation devices. High-power lasers can be used to cut and weld metal materials. Therefore, lasers can cause serious damage to the human body, especially the human eyes, and special care must be taken when using them. There are unified classifications and unified safety warning signs for lasers internationally. Lasers are divided into four categories (Class 1 ~ Class 4). Class 1 lasers are safe for humans, Class 2 lasers cause minor harm to humans, and Class 3 or above lasers are safe for humans. Lasers can cause serious harm to people, so special attention must be paid when using them to avoid direct exposure to human eyes.
