Method and process for selecting laser protective glasses

Laser protective glasses, also known as laser glasses or laser goggles, are essential and basic tools in various related industries upstream and downstream of the laser, ranging from the R&D personnel of laser crystals and laser bars to the operators of laser equipment and laser medical beauty equipment. The users of the laser and the scientific research personnel in the laser processing laboratories must use laser protective glasses.This article introduces the general method of laser protective glasses in detail. The selection of laser protective glasses mainly considers four factors, one is the wavelength of the laser that needs to be protected, the second is the grade of the laser protective glasses, which is related to the price, the third is the use occasion, and the fourth is the user’s own conditions.

  1. Determine the laser wavelength that needs to be protected
    The first step is to determine the laser wavelength that needs to be protected, whether only one wavelength is protected or several wavelengths at the same time. Most laser protective glasses can protect one or more wavelengths at the same time. The main laser wavelengths are as follows: 755nm, 808nm, 1064nm, 532nm, 355nm, 450nm, 635nm, 660nm, 10600nm, different wavelength combinations can be selected Different laser protective glasses. For example, for 1064nm laser and its double frequency 532nm and triple frequency laser 355nm, we can choose the GTY model, which can reach OD6+ in the 355nm and 532nm bands, and OD5+ at 1064nm. For other wavelength combinations, we also There are corresponding models of laser protective glasses recommended.

  1. Determine the grade of laser protective glasses
    The second step is to determine the grade of laser protective glasses, mainly to choose the brand. According to the safety certification, it can be divided into CE certification (CE Certificate) and non-certified products, and can be divided into OD1+ to OD7+ according to the protection level. For most applications, we recommend that users choose large-brand products with CE certification. If the power of the laser is large, it is recommended to choose products with the highest protection level OD7+. For some special applications, such as ultrafast lasers and intense pulsed lasers, we need to consider more parameters.

  2. Consider the conditions of the use occasion
    The third step is to consider the conditions of the use occasion. The main parameter to be considered is the light transmittance. The transmittance of laser glasses is often one of the parameters that users tend to ignore. Because the laser protective glasses block the laser, it also blocks part of the visible light, which affects the user’s observation of the laser or laser processing process. Most users choose high visible light transmittance, such as VLT>50%, which is convenient for directly observing the laser experiment imagination or laser processing process without adding additional auxiliary light sources; there are also a few users who require lower visible light transmittance, such as In some occasions where the visible light is too strong, it is recommended to use models with a transmittance of <50% or even <30% to achieve the best effect of protecting the eyes.

  3. Determine the style of laser protective goggles
    The last step is to determine the style of laser protective goggles according to the individual’s own conditions. Many users only pay attention to the determination of the technical parameters, but do not pay much attention to the style of the laser protective goggles. As a result, the parameters are completely consistent, but they are uncomfortable to wear.
    In short, the choice of laser protective glasses needs to consider the four major factors of laser wavelength, protection level (grade), light transmittance (workplace) and style, in addition to other factors such as delivery, price, and beauty; through these considerations, Users can definitely choose the most suitable laser protective glasses.