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Transmittance analyzer - Baidu Encyclopedia
Date:2013/7/15 13:44:47
Transmittance analyzer range of applications:
Automobile manufacturing and testing, glass, aerospace industry waits for field measurements. Glasses, sunglasses, sun protection film transmittance measurement, measuring the transmittance of plastic, transparent or translucent material transmittance measurements. Now use colored glass as a car windshield has become a fashion, automotive glass are labeled sunscreen film, using a portable light meter can be simple and intuitive test out the visible light transmittance of colored glass, a measurement error is small, reliable high, good stability, simple operation, is essential for product quality control and assurance testing equipment, widely used in transparent or translucent material manufacturing, inspection and testing fields.

Transmittance meter measuring principle
There are the following three:
First, the visible light transmittance meter
Suitable for a wide range of all wavelengths of visible light, generally transparent or translucent material measurement, high accuracy of this method.
Second, the UV transmittance analyzer.
Applies to block UV products, sunglasses and so on, the application of small, different standards
Third, the transmittance haze.
Internationally it is called haze to diffuse through the material flux and flux ratio expressed as a percentage, fewer people use domestic

China is currently the most widely used methods are the following:
For example: Visible transmittance meter for measuring a variety of glass and the transparent or translucent in the visible light beam is incident parallel beam of a medium (such as transparent plastic), due to the unevenness of the optical properties of materials; surface defects, internal organization uneven, bubbles and impurities, etc., will change the direction of the beam (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, the light flux transmitted through the sample to the sample is always less than the incident radiation flux, 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.
In the test sample haze and transmittance process must be measured incident flux (T1), transmission flux (T2), the instrument scattering flux (T3), the sample scattering flux (T4).
Data processing press "test method, the unit transmittance is calculated as follows: transmittance: Tt = T2 / T1 × 100% where T1 is 100
 
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