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Doctors say that laser pointers with power less than 5 milliwatts (5 mW) are safe to use, but devices with power of 100 mW or more sold on the Internet have recently caused permanent eye damage.
The early laser pointers were helium-neon (HeNe) gas lasers and generated laser radiation at 633 nanometer (nm), usually designed to produce a laser beam with an output power no greater than 1 milliwatt (mW). The least expensive laser pointers use a deep red laser diode near the 670/650 nanometers (nm) wavelength. Slightly more expensive ones use a red-orange 635 nm diode, making them more easily visible than their 670 nm counterparts because of the greater sensitivity of the human eye at 635 nm. Other colors are possible too, with the 532 nm green laser being the most common alternative. In the past few years, yellow-orange laser pointers, at 593.5 nm, have been made available. In September 2005, handheld blue laser pointers at 473 nm have also become available. In early 2010[1] “Blu-ray” (actually violet) laser pointers at 405 nm have also become available.
Utdraget från internet.
Informationen är egentligen för laserpennor/laserpekare. Men det är samma funktioner och tekniska uförhållanden oavsett om det är en laserpenna eller en laserkam. Förutom då att ljuset i våra hårbehandlingsprodukter oftast inte har linser som fokuserar ljuset, varav vi då får mer spridning på ljuset.