Search results
Results from the WOW.Com Content Network
For visible-beam consumer lasers, there are four main classes. Each is described in more detail here: Class 2, Class 3R, Class 3B and Class 4. The first two Classes are relatively safe for eye exposure; the last two are hazardous. The chart below shows how the eye injury hazard increases as the laser’s power increases.
Class 2 visible-light lasers are considered safe for unintentional eye exposure, because a person will normally turn away or blink to avoid the bright light. Do NOT deliberately stare into the beam -- this can cause injury to the retina in the back of the eye. Be aware of beam reflections off glass and shiny surfaces.
A Class 2 laser is considered to be safe because the blink reflex (glare aversion response to bright lights) will limit the exposure to no more than 0.25 seconds. It only applies to visible-light lasers (400–700 nm).
Much like Class 2 products, these lasers are visible, between 400 nm and 700 nm, and are normally afforded eye protection for viewing. While they are generally safe for accidental exposure, Class 2M lasers are potentially hazardous if viewed with collecting optics.
There are four main classes for visible-beam lasers: Class 2, Class 3R, Class 3B and Class 4. The first two are relatively safe for eye exposure; the last two are hazardous. The chart below shows that the eye injury hazard increases as the laser’s power increases.
Class 2 lasers are visible light lasers that are generally safe but could cause eye damage if mishandled. These lasers emit radiation from 400 nm to 700 nm and are visible to the naked eye. Like Class 1 lasers, this laser classification is safe to look at with an optical instrument.
Class 2. A Class 2 laser or laser system must emit a visible laser beam. Because of its brightness, Class 2 laser light will be too dazzling to stare into for extended periods.
A Class 2 laser emits in the visible region (400-700nm). It is presumed that the natural aversion response to the very bright light will be sufficient to prevent damaging exposure, although prolonged viewing may be dangerous.
To find out how to safely use your laser, look on its label for the laser's Class, then go to the appropriate page: Class 2 or II; Class 3R or IIIa; Class 3B or IIIb; Class 4 or IV; More information about Classes is here. For additional information about laser safety, see our Links and resources page.
This class includes high-power lasers within an enclosure that prevents exposure to radiation, and that cannot be opened without shutting down the laser. Class 2: A Class 2 laser is safe because the blink reflex limits the exposure to no more than 0.25 seconds.