In contact withthe need to laser facilities in the plant, all the basic plant are using Lasersafety glasses. So what kind of protection does it bring to the eyes? What kindof damage does it bring to the eyes? The next will give you an introduction.
1,the role of the wavelength of the eye in the laser damage to the body in theeyes of the most serious injury. Wavelengths of about 400nm (purple) to 1400nm(near infrared) of the laser, eye refractive media absorption rate is low, hightransmittance, and refractive media focusing capacity (ie, condenser) strong.Highly visible or near-infrared light can enter the eye through the human eyerefractive media, accumulation of light on the retina. At this point the laserenergy density and power density on the retina increased to several thousand oreven tens of thousands of times, a large number of light in the moment togetherin the retina, causing the photoreceptor cell layer temperature rapidlyincreased, so that photoremia coagulation degeneration and necrosis And theloss of the role of light. Laser condensation in the photoreceptor cells causedby overheating caused by protein coagulation degeneration is irreversibledamage. Once the damage will cause permanent blindness of the eye. So need touse Laser safety glasses.
Thewavelength of the laser varies with the degree of the eye, the consequences aredifferent. Far-infrared laser (wavelength longer than 1900nm) damage to theeyes mainly in the cornea, which is because the wavelength of the laser almostall absorbed by the cornea, so the most corneal injury, mainly caused bykeratitis and conjunctivitis. Ultraviolet laser (wavelengths between 315-400nm)is almost entirely absorbed by the lens of the eye, while the far (wavelengthshorter than 315nm) to the main corneal absorption, which can cause lens andcorneal opacity.
2,the degree of laser damage to the eyes in addition to the laser with differentwavelengths, but also with the laser into the eyes of the total light energy,energy density and power density associated. Pupil size and degree of damage tothe size of the pupil of the degree of injury have a certain proportion. Pupilchanges and the environment is different in the dark room, the pupil spread onthe big pupil and the smallest pupil between the light transmission areadifference of more than 20 times.
3,the eye injury in the laser angle of incidence due to the special anatomy ofthe eye and the special physiological relationship, the laser did not use Lasersafety glasses retinal damage and incident eye angle are closely related. Thereason is that the eyeball itself is a condenser lens system, when the laserbeam enters into the eye parallel to the optic axis, it concentrates into asmall spot at the center of the macular area of the fundus, and its energydensity is 3 to 4 times higher than that of the cornea , So the laser directeye is very dangerous.
4,fundus pigment content and damage relationship pigment tissue is very easy toabsorb laser energy, so the more the pigment content, the degree of absorptionof the laser is also strong, the greater the degree of damage suffered. Eyetissue absorbs more energy than its own firing threshold and will be hurtlater. Beyond the more, the more hurt the heavier.
Fromthe above description can not see the importance of Laser safety glasses.Proper wear of Laser safety glasses can effectively reduce the laser damage tothe eyes, play an important role in protecting the safety of the eyes. Greatlyenhanced the efficiency of the studio.