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Choose a suitable laser protective glasses

    Pick a good laser protective glasses arevery important, so we will not know in the selection of laser protectiveglasses to us? Let more people to understand and extensive use of laserprotective glasses for our eyes to the maintenance effect, so that more workersinto the selection of laser protective glasses who can then be guaranteed to wehave strong direction, good monochromaticity, good coherence characteristics inlaser protective glasses using laser accurately, making it in the military,industrial and medical etc. categories are widely used. But precisely thesecharacteristics of the laser also pose a great threat to the human body.

    The eyes are the most sensitive to humanorgans because of the aggregation effect of laser, eye light can make theretina energy density increased 105 times, so the low dose can cause severedamage on the retina resulting in reduced vision and even blindness. With lasertechnology in military and civil areas are widely used, laser protection moreand more attention to our skills, how useful laser protection, we become veryfocused on the question, all worked out corresponding laser protectionstandard. As early as 1962, the United States put forward some laser safetyradiation limit. From the protection principle, laser protective materials canbe divided into three categories: one is based on the now laser protectionprinciple of linear optical absorption type, it contains the reflection typeand absorption reflection type; two is based on the principle of laserprotection of nonlinear optics, it mainly uses the three order nonlinearoptical effects, including nonlinear absorption nonlinear refraction, nonlinearscattering and nonlinear reflection; the three is based on the principle oflaser protection transformation.

    Now Chinese use for laser safety aremandatory standard: there are many types of CJB-2408-95 laser protectiveglasses protection function test way protection GJB-1762-93 laser protectiveglasses health request JB/T 5524-91 laboratory laser safety rules of laserprotective glasses, the materials used are not the same, the principle ofdifferent application occasions are not the same. Therefore, to provide usefulprotection to the laser, must be in accordance with the detailed applicationrequirements of laser protective glasses reasonable selection. Choose the doormirror, the maximum laser output power of the primary basis (or energy), beamdiameter, laser pulse time parameters determine the maximum output irradianceor maximum exposure. Then, according to the maximum amount of the correspondingwavelength and light irradiation to time (eye shine limit) concluded thatglasses the minimum optical density value, and then select the appropriateprotective glasses.

The detailedconditions selected are:

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

    2, specific protection wavelength;

    3, the optical density value of Dmin tothe corresponding protective wavelength;

    4, the protective lens non-uniformity,asymmetry, incident light viewpoint effect;

    5, anti laser radiation ability;

    6, visible light transmittance;

    7, structure and shape. Laser has strongdirectional, monochromatic good, good coherence and other characteristics,making it in the military, industrial and medical fields are widely used. Butprecisely these characteristics of the laser also pose a great threat to thehuman body. The eyes are the most sensitive to human organs because of theaggregation effect of laser, eye light can make the retina energy densityincreased 105 times, so the low dose can cause severe damage on the retinaresulting in reduced vision and even blindness. With laser technology inmilitary and civil areas are widely used, laser protection more and moreattention to our skills, how useful laser protection, we become very focused onthe question, all worked out corresponding laser protection standard. As earlyas 1962, the United States put forward some laser safety radiation limit.

    From the principle of protection, nowlaser protection information can be divided into three categories:

    First, according to the principle oflinear optical laser protection, which contains absorption, reflection andabsorption / reflection composite;

    Two is based on nonlinear opticalprinciple of laser protection, it is the first use of nonlinear optical effectsof three order, including nonlinear absorption, nonlinear refraction, nonlinearscattering and nonlinear reflection;

    Three is based on the principle of phasechange laser protection.

Now China for theuse of laser safety mandatory standard: CJB-2408-95 laser protective glassesprotection function test method of laser protective glasses health protectionGJB-1762-93 request JB/T 5524-91 Laboratory for laser safety rules.

    Laser protective glasses have a variety oftypes, the information used is not the same, different principles, the use ofoccasions are not the same. Therefore, to provide useful protection to thelaser, must be in accordance with the detailed application requirements oflaser protective glasses reasonable selection. Choose the door mirror, themaximum laser output power of the primary basis (or energy), beam diameter,laser pulse time parameters determine the maximum output irradiance or maximumexposure. Then, according to the maximum amount of the corresponding wavelengthand light irradiation to time (eye shine limit) concluded that glasses theminimum optical density value, and then select the appropriate protectiveglasses.

The detailedconditions selected are:

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

    2, specific protection wavelength;

    3, the optical density value of Dmin tothe corresponding protective wavelength;

    4, the protective lens non-uniformity,asymmetry, incident light viewpoint effect;

    5, anti laser radiation ability;

    6, visible light transmittance;

    7, structure and shape

    I believe we all know the effect of laserprotective glasses, we can use the laser protective glasses on the protectiveeffect to play

    This paper provided by radium screenscience and technology, please indicate that radium screen technology provide , Laser safetyeyewear, , andother products, please login (lsys789.cn) consulting


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