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About the Rhopoint Novo-Haze TX Transmission Hazemeter
The Novo-Haze TX Transmission Hazemeter provides high accuracy measurements
and complies with the standard: ASTM D1003. The unit uses a white light LED
filtered for equivalence to CIE C light source plus human photopic response.
The transmission hazemeter quantifies the optical qualities of transparent materials.
The two most important aspects are:
1. Transmission – a measurement of the total amount of light that passes through a
material that is influenced by absorption and reflective properties. It is used in the
plastic film industry to determine the opacity of materials or the hiding power of
applied coatings.
2. Transmission Haze – a measurement of the light scattering characteristics of a
material. Haze can be due to suspended particles or contaminants within a sample
or fine surface texture & contamination. Haze measurement can be used to quantify
optical characteristics of glass, plastics and packaging films. In packaging
applications, hazy films may reduce a consumer’s quality perception as packed
products can look cloudy and indistinct. For plastics and glass with haze, the visibility
of the test material becomes more apparent and the contrast of viewed objects is
reduced.
The diagram below shows the measurement principle of Rhopoint’s Novo-Haze TX
transmission hazemeter. A collimated light beam passes through the specimen and
enters an integrating sphere. The sphere’s interior surface is coated with a highly
reflective white paint to allow diffusion. A detector, positioned at 90 degrees to the
light beam in the sphere, measures total transmittance and transmission haze.