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Different types of laser glasses have different functions

by:LASERRPAIR     2020-06-20
After the laser protective glasses, we have more and more understood that different types of laser protective glasses bring different protection to our eyes, to ensure that our eye protection bands, on the task of personnel in contact with the laser, can be real to our eyes To maintain the influence, when using laser protective glasses, we will improve the safety of our eyes in real time. Here I recommend everyone to use our laser protective glasses, so that you can be more worried about our laser protective glasses and Admit. There are many types of laser protective glasses, the materials used are different, the reasons are different, and the place of use is also different. Therefore, to provide ineffective protection against lasers, it is necessary to stop reasonable selection of laser protective glasses according to detailed application requests. When choosing protective glasses, first of all, according to the maximum input power (or energy) of the laser used, beam diameter, pulse time and other parameters, confirm the maximum irradiance or maximum irradiance of the laser input. Then, confirm the minimum optical density value required for the glasses according to the response wavelength and the maximum allowable irradiation amount (eye exposure limit) of the irradiation time, and then extract the appropriate protective glasses accordingly. The detailed prerequisites selected are: 1. Maximum irradiance Hmax (J / m2) or maximum irradiance Emax (W / m2); 2. Specific protection wavelength; 3. The required minimum optical density value Dmin in response to the protective wavelength; 4. The non-uniformity, asymmetry, angle effect of incident light, etc. of the protective lens; 5. Ability to resist laser radiation; 6. Visible light transmittance; 7. Structure and appearance. Laser protective glasses, laser protective glasses, laser glasses, laser protection, protective glasses, we only need a pair of eyes, please pay attention to maintenance! Laser specifications and classification American laser safety standard ANSI Z136.1 ANSI Z136.1 standard: Through optical density (OD, Optical Density) to stop the trade-off. The logical relationship between optical density OD and transmittance T: D = -log10 T. The European laser safety standard EN207 / EN208EN207 / EN208 specifications: thinking about the optical density OD, in addition also needs to think about the damage threshold (power / energy density changes with time). According to the American laser safety standard ANSI Z136.1 and the European laser safety standard EN207 / EN208, the laser can be classified according to the following specifications. Class Definition Definition Suggest Suggestion 1 No risk, no need for laser protective glasses, 1M glasses safe visible laser (400-700nm), no optical reduction, no laser protective glasses required 2Glasses Ping An Visible Laser (400-700nm), blinking safety within 0.25 seconds does not require laser protective glasses, 2M glasses Ping An Visible Laser (400-700nm), blinking safety within 0.25 seconds, with optical zoom is recommended to use laser protective glasses, The 3R direct-view laser can be unsafe. The maximum allowable exposure value (MPE) is 5 times that of the second-level laser in visible light, and 5 times that of the first-level laser in Fuchengjian. It is recommended to use laser protective glasses. 3B direct-view laser is not Safe, diffuse reflection laser as far as possible to prevent the use of laser protective glasses 4 Direct-view lasers and diffuse reflection lasers are not safe. Laser protective glasses must be used. Optical Density Transmission Density Transmission% Attenuation Factor 0100% 1 110% 10 21% 100 30.1% 1000 40.01% 10000 50.001% 100000 60.0001% 1000000 70.00001% 10000000 Laser protective glasses selection guidance 1. Laser characteristics: the input wavelength and power density of the laser. 2. Optical Density (OD): The larger the OD value, the stronger the protective ability of the laser protective glasses. 3. Visible Light Transmittance (VLT): The value of VLT is less than 20%, and laser protective glasses need to stop using in the case of superior lighting. 4. Frame: Can you wear farsighted glasses and facial contours? We can all have new views and understandings on laser protective glasses, let our laser protective glasses lose recognition from time to time, in our views from time to time to improve the use of laser protective glasses, let us clearly understand our laser protection The use of glasses is universal, which can make our laser protective glasses lose everyone's recognition, and can make our laser protective glasses become a universal favorite of us.
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