A transparency meter, also called a clarity meter, is an instrument used to measure the transparency of an object. Transparency refers to the optical distinctness with which an object can be seen when viewed through plastic film/sheet, glass, etc. In the manufacture of sheeting/film, or glass the quantitative assessment of transparency is just as important as that of haze.[1]
Transparency depends upon the linearity of the passage of light rays through the material. Small deflections of the light, caused by scattering centers of the material, bring about a deterioration of the image. These deflections are much smaller than those registered in haze measurements. While haze measurements depend upon wide-angle scattering, clarity is determined by small-angle scattering. Wide and small angle scattering are not directly related to each other. By this, we mean that haze measurements cannot provide information about the clarity of the specimen and vice versa.
Total Transmittanceedit
An object's transparency is measured by its total transmittance.[2] Total transmittance is the ratio of transmitted light to the incident light. There are two influencing factors; reflection and absorption. For example:
ASTM International (formerly known as the American Society for Testing and Materials) is the main body which works within the industry and develops standards for various tests/instruments. They dictate that the industry standard for the clarity meter entails the following; 1. Reference beam, self-diagnosis, and enclosed optics 2. Built-in statistics with average, standard deviation, coefficient of variance, and min/max 3. Large storage capacity and data transfer to a PC. These standards are described in ASTM standard D 1746.[3]
transparency, meter, this, article, needs, additional, citations, verification, please, help, improve, this, article, adding, citations, reliable, sources, unsourced, material, challenged, removed, find, sources, news, newspapers, books, scholar, jstor, july, . This article needs additional citations for verification Please help improve this article by adding citations to reliable sources Unsourced material may be challenged and removed Find sources Transparency meter news newspapers books scholar JSTOR July 2013 Learn how and when to remove this template message A transparency meter also called a clarity meter is an instrument used to measure the transparency of an object Transparency refers to the optical distinctness with which an object can be seen when viewed through plastic film sheet glass etc In the manufacture of sheeting film or glass the quantitative assessment of transparency is just as important as that of haze 1 Transparency depends upon the linearity of the passage of light rays through the material Small deflections of the light caused by scattering centers of the material bring about a deterioration of the image These deflections are much smaller than those registered in haze measurements While haze measurements depend upon wide angle scattering clarity is determined by small angle scattering Wide and small angle scattering are not directly related to each other By this we mean that haze measurements cannot provide information about the clarity of the specimen and vice versa Total Transmittance editAn object s transparency is measured by its total transmittance 2 Total transmittance is the ratio of transmitted light to the incident light There are two influencing factors reflection and absorption For example Incident light 100 Absorption 1 Reflection 5 Total Transmittance 94 Industry Standards editASTM International formerly known as the American Society for Testing and Materials is the main body which works within the industry and develops standards for various tests instruments They dictate that the industry standard for the clarity meter entails the following 1 Reference beam self diagnosis and enclosed optics 2 Built in statistics with average standard deviation coefficient of variance and min max 3 Large storage capacity and data transfer to a PC These standards are described in ASTM standard D 1746 3 External links edit Koleske Paint and Coating Testing Manual p 370 ISBN 0 8031 2060 5 Total Transparency Measurement BYK Gardner haze gard Archived from the original on 2013 05 10 Retrieved 2013 06 13 Standard Test Method for Transparency of Plastic Sheeting nbsp This optics related article is a stub You can help Wikipedia by expanding it vte Retrieved from https en wikipedia org w index php title Transparency meter amp oldid 1138423523, wikipedia, wiki, book, books, library,
