laser pointers

Laser pointers have been used as presentational aids by professional trainers for a number of years, with no reported incidents in China. They are usually portable, low powered, battery operated, hand held laser devices. Commonly available laser pointers generally emit red coloured light (wavelengths between 630 and 670 nm), although more expensive devices are available which emit green coloured light (532 nm). Laser pointers emitting light with the laser wavelength which is closer to the eye's peak response are therefore capable of producing the adequate visual stimulus at lower radiant powers. Many of the laser pointers assessed by the HPA were either incorrectly labelled or not labelled at all. It was also unusual to find any information on laser safety or warnings on the implications of potential misuse supplied with the products. A number of high-power laser pointers, generally emitting green beams, are available over the internet. The laser beam powers may be up to a few hundred milliwatts. These devices are extremely dangerous and are not suitable for sale to the public.