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Window-Tint-Meter testing principles
Date:2013/7/27 16:49:50
Light meter full name transmittance meter, light transmittance meter, light transmission rate tester, English name: Window-Tint-Meter is a portable test material transmittance of the instrument.

Applications
Instrument is widely applied to automobile manufacturing and testing, glass, aerospace waiting for the industry at site.
Such as: glasses, sunglasses, sun protection film transmittance measurement, measuring the transmittance of plastic, transparent or translucent material transmittance measurements.

Test Features
Now use colored glass as a car windshield has become a fashion, most of the automotive glass are labeled sunscreen riot film.
Simple and intuitive to use light meter can test out the glass visible transmittance measurement error is small, high reliability, good stability, simple operation, is to control the traffic safety and essential for product quality assurance testing instruments.

Measuring principle
1, visible light transmittance meter
Suitable for a wide range of all wavelengths of visible light, the center wavelength of the general NM, the transparent or translucent material measurement, high accuracy of this method.
2, UV transmittance analyzer.
Applies to block UV products, sunglasses, photovoltaic glass, optical devices, etc., are widely used.
3, light transmittance haze.
Internationally it is called haze to diffuse through the material flux and flux ratio expressed as a percentage, which is currently in the development of domestic slowly.
Another infrared transmittance meter, multi-instrument, such as light transmittance wide variety of brands and models.

Works
When a beam of parallel light beam is incident in a medium (such as transparent plastic), due to the unevenness of the optical properties of materials.
Surface defects, uneven internal organization, such as bubbles and impurities, the beam will change direction (diffusion and deflection), the light generating portion of said scattered light disorganized.
International regulations deviate from the incident light through the sample with the direction of the scattering and transmission of luminous flux ratio expressed as a percentage, which is called haze, haze gives the impression that a large sample will be more blurred.
Light through the sample will be generated when the loss of luminous flux that is transmitted through the specimen to the specimen is always less than the incident radiation flux.
Between the ratio expressed as a percentage, is defined as the transmittance internationally.
Reasons for the decline caused by light transmittance two surfaces of the specimen and the specimen reflection of light on the wavelength of the incident light of all or part of the wavelength of light energy absorption.
 
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