How to make the performance test of thelaser protective mirror is to protect the safety of the laser users. With thedevelopment of laser industry and the popularization of laser applications,laser protective goggles have been gradually formed new products, which is animportant part of the laser safety and health standards and regulations. Thestandard reference to the international advanced standards and in accordancewith the actual situation in china.
The standard provides the main influencingparameters and evaluation of laser goggles name, definition, test method andcalculation method, to guide the production and scientific research, providethe basis for management, provide the basis for management, is of greatsignificance to ensure the personal safety of contact. This standard by thePeople's Republic of China State Economic and Trade Commission put forward bythe Bureau of safety production. This standard drafting unit: Beijing laserparameter testing center. The main drafters of this standard: Lu Yaodong, YuYuanhuai, full of spring. This standard is responsible for the interpretationof the Beijing laser parameter testing center.
A range of laser protective eyewearsstandard test conditions, main technical parameters for the laser eye injuryprotection personal protective equipment eye lens material laser protectiondevice and method, test project. This standard applies to the design,production, inspection and use of laser protective goggles.
Two. The provisions of the followingstandards for the use of laser protective goggles, which are referred to inthis standard. At the time of publication of this standard, the versions shownare valid. All standards are subject to revision, and the parties to use thisstandard shall explore the possibility of using the latest version of thefollowing standards. GB 72471995 laser products for radiation safety, equipmentclassification, requirements and user's Guide (IDT IEC 825:1984) GB 108101996lens (EQV ISO 8980-1:1996) GB/T 153131994 laser terms
Three. The definition oflaser protective goggles is defined by the following definitions.
1, laser protective goggles to preventlaser damage to the human eye protective goggles, according to the principle ofprotection can be divided into reflection, absorption, diffraction and complex.
(1)a laser protective mirror made of a filter material with a correspondingreflection radiation laser wavelength dielectric film.
(2)a protective lens made of a filter material for absorbing the correspondinglaser radiation wavelength of an absorbing mirror.
(3)a protective lens made of a filter material coated with a reflective dielectricfilm on a material absorbing a corresponding laser radiation wavelength.
2, laser goggles optical density of saidlaser protective lens degree of attenuation of a specific wavelength, expressedby the common logarithm, i.e. the incident light irradiance Er (radiation Hr)and Et (transmission light irradiance exposure Ht) than on the value.
3. The ratio of visible lighttransmittance in the visible spectrum range of the laser protective lens to thepower of the incident light (energy).
4, laser damage threshold of the doormirror minimum irradiance injury (W m-2) or radiation (J m-2). The damagethreshold of goggles should be greater than the maximum irradiance it may be inuse.
5, test conditions
(1)operators should have laser safety knowledge.
(2)the ambient temperature of the test system shall be 15~35 DEG C, relativehumidity 45%~75%, pressure 86~106kPa.
(3)the power supply performance of test equipment shall meet the requirements oftest equipment.
(4)the whole test system shall not be affected by obvious vibration, air flow,dust and stray radiation.
(5)high voltage, laser radiation and other personnel should be in line with thecorresponding safety standards.
(6)the measuring instruments used in the test of the laser, such as the electricmeter, the laser power and the laser energy measuring instrument, shall be inaccordance with the requirements of the state for the verification regulationof the measuring instruments, within the validity period of the metrologicalverification.
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