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Class 3R emit a visible beam (400-700nm) that does not exceed 5 times the limit of class 1 for invisible, or 5 times the limit of class 2 for visible radiation (=5mW). R stands for relaxed, lasers of class 3R do not require the same safety measures as lasers of class 3b and 4 do. any Class 2M laser devices intended for consumer use. If you do have such a laser, consult a qualiﬁed Laser Safety Oﬃcer for more detailed analysis. Class 3R is either: (1) From 1 to 4.99 mW into a 7mm aperture (e.g., pupil of the eye) or (2) ﬁve times the Class 2 limit of 2.5 mW/cm2, which works out to be 12.5 mW/cm2. The second Laser class 3R devices are potentially dangerous to the eyes.
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The laser can produce no more than 5 mW in the visible region. Laser classes Lasers are classified for safety purposes based on their potential for causing injury to humans’ eyes and skin. Most laser products are required by law to have a label listing the Class. It will be listed either in Arabic numerals (1 2, 3R, 3B, 4) or in Roman numerals (I, II, IIIa, IIIb, IV). 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. Click chart for larger view Se hela listan på blog.ansi.org A Class 3R laser is considered safe if handled carefully, with restricted beam viewing.
Optical Output Power, 3mW.
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If yes : Eye damage, skin damage. This Class 3R Laser In Use CAUTION sign is custom printed with your precautionary instructions, OD @ wavelength and other required information.
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The first two are relatively safe for eye exposure; the last two are hazardous.
Click chart for larger view
Class 3R (restricted) A Class 3R laser is divided into two groups, visible and invisible (e.g. UV or IR) light. Visible light (wavelength between 400 and 700nm): Class 3R includes lasers with higher than 1mW but lower than 5mW output power.
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Avoid viewing Class 3R laser beams directly. Avoid point a Class 3R laser beam at a person. Avoid viewing a Class 3R laser beam with telescopic devices; this amplifies the problem. Class 3B lasers are intermediate power (CW 5-500 mW or pulsed 10 J/cm²) devices.
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Class 3b Laser Class 3R. Class 3R emit a visible beam (400-700nm) that does not exceed 5 times the limit of class 1 for invisible, or 5 times the limit of class 2 for visible radiation (=5mW).
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The risk of eye damage is reduced by the limit value of the maximum accessible radiation (GZS) of: 5 times the limit value of laser class 2 in the visible wavelength range Class 3R Laser Warning Labels. Laser Warning Labels IEC We provide laser warning labels for certification and Identification, warning logotypes, apertures, and protective housings. Label information is silk-screened onto vinyl stock, which has a pressure sensitive 'peel and stick' backing. Special Class 3R. Radiation in this class is considered low risk, but potentially hazardous. The class limit for 3R is 5x the applicable class limit for Class 1 (for invisible radiation) or class 2 (for visible radiation).
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For other wavelengths and for pulsed lasers, other limits apply. Class 3R (restricted) A Class 3R laser is divided into two groups, visible and invisible (e.g. UV or IR) light. Visible light (wavelength between 400 and 700nm): Class 3R includes lasers with higher than 1mW but lower than 5mW output power. För att få använda lasrar i laserklass 3B och 4 i samband med exempelvis lasershower eller på nattklubbar krävs tillstånd från Strålsäkerhetsmyndigheten.
19. 1 Feb 2021 Level and orientation instruments; Class 3R laser products. direct intrabeam viewing is potentially hazardous but the risk is lower than Class 3B 11 Mar 2021 Class 3R - Can cause damage to eye from direct laser beam exposure if eye is focused on the laser beam. Class 3B - Can cause damage to eye 28 Sep 2011 Class 3B applies to both visible and invisible lasers. Direct intra-beam viewing near these devices is always hazardous. Viewing diffuse o Class 3R lasers are “Marginally Unsafe.” This means that the aversion response is not adequate protection for a direct exposure of the eye to the laser beam, Class 3 is divided into 3R (the R stands for reduced requirements) and 3B.