What is the wavelength of the green laser pointer?
The green laser designator's "green" is 532 nm, which is twice the 1064 nm emission frequency from a neodymium laser such as Nd:YAG, Nd:YLF or Nd:YVO4. A neodymium green laser pointer pumped by a diode (say, 800 nm) emits light at 1064 nm. The double crystal produces green 532 nm light. But multiplied crystals are not 100% efficient, so an IR filter is needed to block the remaining unmultiplied 1064 nm light (and the 800 nm pump light). The above shows how much 1064nm light escapes if the filter is removed story: this is much more than green light, if 532nm wavelength is 20 milliwatts, infrared can be as high as 100 milliwatts, and of course can damage the eye even more!
Tags
Material
A high-power green high powered laser or laser pointer is a small, portable device with a power source (usually a battery) and a laser that emits a very narrow, coherent, low-power beam of visible light, designed to highlight its color by illuminating the object of interest with small dots. Safety grade: Class 2 or II for visible laser designators (400 -- 700 nm) operating at less than 1 mW, class 3A or IIIa for visible laser designators operating at 1 -- 5 mW. Class 3B or IIIb lasers produce power between 5mW and 500 mW, and Class 4 or IV lasers produce power over 500 mW. Warning: If the laser pointer is aimed at a person's eye, it may cause temporary visual impairment. There is some evidence of rare minor permanent injuries, but low power laser Pointers are not a serious health hazard. In some cases, they can be a major annoyance. The blip from the red laser designator may be thought to be caused by the laser sight, causing anger and possible danger. When pointing at an aircraft at night, laser Pointers can be confusing and distract the pilot.
2021-12-20 11:56:01
Your Answer: