How to choose laser safety glasses?

Buyers Guide | How to Choose Your Laser Safety Glasses? 
Published by The VY Optoelectronics Co.,Ltd. | Laser Safety Glassses on November 23rd.

Typically, to determine what type of Laser Safety glasses or goggles to buy, the following is needed:

1) Know your laser's wavelength.
2) Determine the protection level needed based on your laser's output parameters, or look for the recommended Optical Density (OD). This can ask your engieer, or please feel free to contact us for a assitance.
3) Select a filter whose specifications match the above information. 

Laser safety glasses is very necessary for a laser power even 5mw, they are extensively used in the field of laser alignment, laser medical treatment, Laser industry etc.

Lasers are more dangerous than most people understand, and your eyes are the most vulnerable to laser damage. Use properly with laser safety glasses can protect eyes even from low power laser beams.


VY engaged in Laser safety products develop and research, and we can supply you laser safety glasses ,laser safety window , the protection wavelength from 200nm~10600nm, wavelength covers 405nm purple, 450nm and 473nm blue, 520nm 532nm green ,635nm 660nm red , and infrared beam 808nm,980nm, 1064nm, 1070nm and 1080nm, CO2 laser and 10600nm laser protection . Those laser safety products we offered hold the features of high Optical density and good VLT. All our products meet with European CE standard EN207:1998+A1:2002, and we have CE certificate. 
Here we'd like to provide more detailed instroduction of laser safety goggles for your better understading.

1. How do laser goggles work?
   Laser safety glasses have colored or special clear lenses that filter light. They block certain wavelengths of light (either visible or invisible) and allow other light through. ...Laser lenses are usually impregnated with special chemicals and dyes which allow them to block the wavelengths they block

2. Do laser enhancement glasses work?
   No matter their color, laser enhancement glasses work by reducing or eliminating light other than the color they are designed to make more visible. They do not brighten the laser, but by reducing or removing other light waves from the vision of the wearer, the laser appears brighter.

3. What is OD laser safety?
   ANSI Z136.1 requires specification of laser safety eyewear according to optical densities (OD), and allows a Nominal Hazard Zone (NHZ) to be calculated, outside which diffuse viewing eyewear is allowed. Optical Density (OD) is a measure of the attenuation of energy passing through a filter.


4. Which wavelength region of laser radiation is likely to cause cataracts?
   Ultraviolet Radiation (200 - 400 nanometers)
   Wavelengths less than 400 nm do not pose a hazard to the retina. Exposure to the skin from lasers that emit in the UV region may cause a photochemical reaction resulting in reddening, aging, and possibly skin cancer.

5. What does optically dense mean?
    In an optically dense(large optical density) material,the ray of light bends towards the normal(line perpendicular to the interface of the material).And in an opticallyrare(less optical density) material,the ray of light bends away from the normal.

6. How do you prevent injury during laser procedure?
   The surgical technologist or surgical assistant should be responsible for aligning thelaser optical system, eg beam, beam deflectors, mirrors, and lenses, prior to using the laser system to prevent inadvertent eye exposure during the procedure.

7.What is nominal hazard zone?
  Nominal Hazard Zones
 Having determined the MPE for a specific laser operating in a specific mode, you can now define a Nominal Hazard Zone (NHZ). The NHZ relates to the space within which the level of direct, reflected, or scattered radiation during normal operation exceeds the appropriate MPE.

8. What are the characteristics of laser?
  Laser radiation has the following important characteristics over ordinary light source. They are:
  i) Monochromaticity 
  ii) Directionality
  iii) Coherence
  iv) Brightness
  (i) Monochromaticity: A laser beam is more or less in single wavelength. i.e., the line width of laser beams are extremely narrow.




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