How to choose the right laser protection glasses?

Good laser pointer protective glasses need to consider the following factors, high transmittance, wavelength and protection value. 1. VLT transmittance. In visible light, the attenuation of light by a filter is defined as the transmittance of visible light. The ISO standard Z136.7 on personal Protection states that the VLT test is related to the standard light source. Pay attention to the light condition of the glasses. When the VLT is below 20%, the field of vision is still relatively dark. You need to make sure their working environment has extra lighting. The higher the VLT, the better the resolution. Note that VLT is the average transmittance of visible light over the entire visible light. 2. Choose the right wavelength. The American National Standards Organization, ANSI Z136.1, requires that laser protective glasses be labeled with the wavelength and OD value. In general, the manufacturer will mark the most common wavelength range and OD value on the glasses. A few users use wavelengths not listed on the glasses. For details, it is best to consult the manufacturer in order to provide the most suitable glasses. The choice of laser protective glasses mainly consider four factors, one is the wavelength of the laser, the need for protection, the second is the grade of Laser pointer protective glasses, which is related to the price, the third is the use of the occasion, the fourth is the user's own conditions.