蓝洞棋牌苹果手机

What are the effects of laser protective glasses

    Believe everyone on the laser protectiveglasses is not unfamiliar to it, we should be in the use of laser protectiveglasses practical choice to stop use, in the introduction of laser protectiveglasses before, let's understand a laser and laser damage to the human eye, canprompt more people to strengthen the protection of the eyes.

    1 what is the last Chinese laser laser?Called laser, laser, it is the title of English LASER transliteration, is anabbreviation for Light Amplification by Stimulated English from Emission of andthe first Radiation of the letters of each word form. Stimulated emission oflight. Laser full name of the full expression of the secondary process of manufacturinglaser. In 1964, according to China's famous scientist Tsien Hsueshen suggestedthat the light stimulated emission laser was renamed. In the unified relatedradiation field, a small amount of particles from the high energy level to thelow energy level transition, the release of a small amount of photons, theoccurrence of stimulated emission of light, called laser.

    2 laser damage to the glasses because ofthe characteristics of the laser, the energy in space and time on a high degreeof concentration. The refractive media of the eye is focused on the retina toform an image, and the energy density of the retina is better than the incidentenergy density of the cornea, the laser monochromatic is good, and the color ofthe fundus is small. These features cause extremely low laser energy to shineto the eye of the eye or retina damage.

The secondarysymptoms of 3 laser damage accidents in the operation of temporary task inlaser eyes was a temporary effect. In the operation and use of lasers, even ifno direct laser shines, attack formation damage accident. But the laser isreflected by the rays through other objects or walls, such as the occurrence ofmicro reflection, temporary task in this population, the incidence of cataractis very high. When the accident occurred, most of the injured felt beforesuddenly flash, then present a different color, different sizes of the spot orpeople with eye shadow, the general sense of shock, at the same time, there aredifferent levels of reduced eyesight, or a short time cannot distinguishobjects before, after injury showed some dizzy and photophobia hours.

    4 the choice of laser protective glassesfollows the laser technique in the military and civil areas. The technique oflaser protection is more and more attention, and the variety of the laserprotection materials is increasing day by day. From the protection principle,current laser protection data can be divided into three categories: one is thelaser protection based on linear optical principle, it includes receiving,reflection and receiving the reflection type; two is the laser protection basedon nonlinear optical principle, it is mainly used for three order nonlinearoptical effects, including nonlinear receiver nonlinear refraction, nonlinearscattering and nonlinear reflection; three is based on the principle of laserprotection transformation. The laser has the characteristics of strongdirection, good color and good correlation, which makes it widely used inmilitary, industrial, medical and other fields. But just the laser of thesecharacteristics of the human body also formed a great threat. Human eyes arethe most sensitive to the laser organ, because the focus affect eye light canmake the retina energy density increased 105 times, so the low dose can causeserious damage on the retina caused by eyesight reduced until blindness. How tostop the ineffective laser protection, become people's most concerned about theresults, the countries in response to the development of laser protection standards.As early as in 1962, the United States put forward some laser safety radiationlimit. The use of forced norms on laser safety has now in China: CJB-2408-95laser protective glasses protection function test method of mental healthGJB-1762-93 laser protective eyewear protection request JB/T 5524-91 laboratorylaser safety rules

    5 introduction of laser protective glasseslaser mirror has a variety of types, the data differences, individualdifferences also use place reason. Therefore, to provide for the laser is noteffective protection, must be based on the detailed application of the requestfor a reasonable choice of laser protective mirror. Choose the door mirror, themaximum input power laser with first basis (or energy), beam diameter, laser pulsetime and other parameters must enter the maximum irradiance or maximumexposure. Then, according to the maximum permissible exposure time and lightresponse wavelength (eye shine limit) certainly glasses the minimum opticaldensity value, and then select the appropriate protective glasses.

The details of thechoice of secondary:

    1, the maximum amount of radiation Hmax(J/m2) Emax (W/m2) or the maximum irradiance;

    2, specific protection wavelength;

    3, in response to the optical density valueof Dmin protective wavelength;

    4, the non - average of the protectivelens, the non - symmetry, the incident light angle effect and so on; 5, theanti - laser radiation ability;

    6, visible light transmittance;

    7, structure and shape.

    Withthe widespread use of the laser technique in military and civil areas, more andmore attention has been focused on the technique of laser protection, and thevariety of laser protection materials is increasing day by day. From theprotection point of view, the current laser protection materials can be dividedinto receiving, reflective and receiving / reflective composite. The advantagesand disadvantages of the receiving and reflecting laser protective glasses

    Reflection type laser protective glassesare plated on the surface of the substrate with a multilayer reflectivedielectric layer.

Strengths:

    1, the process is complex;

    2, the visible light transmission rate ishigh;

    3, the decay rate is higher;

    4, light reaction time fast 10-9 seconds;

    Defect:

    1, the light source has a seriousselectivity. The incident light      sourcemust be opposite to the protective mirror (the incident light is the mirrornormal deviation), the protection effect is the biggest. Otherwise it willappear blue drift, the greater the incidence angle, the shorter the protectionwavelength

    This paper provided by radium screen science and technology, pleaseindicate that radium screen technology provide Laser safetyglasses, Lasersafety eyewear, Laser safety goggle and other products, please login (lsys789.cn)consulting


friendly link:     g

Hot Line

     WhatsApp:

    0086 13510169764

    0086 13411887597

     sales@lsys789.cn


ABUIABAEGAAgsMb6tQUo_oOzyQUwuQE4Tw