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 …

Lasers are classified based on their potential for causing injury — especially eye damage, since the eye is most susceptible to excess laser light. There are four main classes for visible-beam lasers: Class …

This class includes all lasers or laser systems which cannot emit levels of optical radiation above the exposure limits for the eye under any exposure conditions inherent in the design of the laser product.

Class 2 are low power lasers (output must be less than 1 milliwatt) that must be visible (wavelengths between 400 nm – 700 nm). A human’s natural aversion response time of 0.25 seconds to bright …

Class 2 lasers or laser systems (low power) emit in the visible portion of the spectrum, from 400 nm to 700 nm, and eye protection is normally afforded by the aversion response, for example, blinking, …

For class 2 lasers, the accessible laser radiation is between 400 nm and 700 nm and thus in the visible spectral range. Class 2 lasers are not dangerous to the human eye if exposure is limited to less than …

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 …

Mar 4, 2025 · Lasers can only be classified as class 2 if their laser light is visible. This is important because the blink reflex as well as other aversion responses (like head movements) won’t be …

Sep 13, 2019 · Class 2 laser systems are limited to the visible portion of the spectrum (400-700 nm) and to an output of 1 mW for continuous wave lasers. The natural aversion reaction to bright visible light …

Class 2M denotes Class 2 lasers or laser systems that do not normally pose a hazard for unaided viewing; however, are potentially hazardous if viewed with collecting optics.