and skin hazards. use of all or part of any images or content found on this site is expressly prohibited, unless [mw] This convenient online tool will calculate what optical density is recommended for use with a [beam-diameter-in-meters] The calculator above can help you in determining this Nominal Ocular Hazard Distance with ease.

[units] ( Similarly, figure 2 can be used to calculate viewing hazards.

Disclaimer: All information and material posted on this Website are subject to copyrights owned ( You appear to be running Internet Explorer or another incompatible browser; if so, all the results will be “.0”.

32.8 ) ( ocular hazard distance (NOHD), nominal hazard zone (NHZ), and laser hazard classification.

This distance is called the Nominal Ocular Hazard Distance (NOHD):A laser beam can be made safer by increasing its divergence (beam spread), lowering its power, and reducing the exposure time.

THIS TOOL IS NOT SUITABLE FOR CALCULATING THE SAFETY OF A LASER SHOW DISPLAY! Laser beams slowly spread out.

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One of the big advantages of the new Evaluator System is that you can choose the subscription level that fits your specific needs–Advanced, Intermediate or Basic. (

Specially designed for users with minimal experience, the Basic package provides the essential

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12.7 Also, what is a safe distance to audience scan with 30mw? Plus, you can easily upgrade or downgrade to any subscription level at any time—making it a flexible and scalable solution for dynamic organizations.

[mrad] Laser hazard distance calculator Click here for an online laser hazard distance calculator.

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")For a full-featured Laser Hazard Distance Calculator, with the NOHD, EDThis calculator will not work with Internet Explorer.

All other rights reserved. Laser MPE Tables . * by the Laser Institute of America (LIA). This innovative System provides a reliable way to easily double-check laser safety calculations. ( ( [vcf] LIA’s online OD Calculator supplies you with the minimum OD required for laser safety eyewear in continuous, single, and repetitive wave pulse modes. *

The photo above shows glare, where it is difficult or impossible to see the runway as long as the light stays in the pilot's eye.

")The MPE light level (irradiance) was set by laser safety experts to be one-tenth of the ED“ED” means “Effective Dose.” This term comes from pharmacology, where EDAs stated at the top of this calculator, the results are valid only for visible light exposures of less than 1/4 second, from continuous wave (not pulsed) lasers.The Maximum Permissible Exposure varies depending on the laser's operating mode (continuous wave or pulsed), wavelength, exposure duration, and whether the exposure is to Eye, Skin or materials.The visual interference distances depend not only on the laser’s NOHD and visual interference distance equations It is easy to calculate the eye hazard distance (NOHD), and the three visual interference distances corresponding to flashblindness, glare and distraction. * * *

Online calculators A calculator for determining the irradiance of a laser beam, given the following: Beam diameter at aperture; Beam divergence; Distance to the target point (for laser light shows, the closest access point of the audience) Laser power; The calculator …

32.8 That’s because the beam’s power density (irradiance) from the laser source to the NOHD exceeds the Maximum Permissible Exposure limit set by scientists of 2.54 milliwatts per square centimeter.