Light Reflectance Value Test Method

In architecture light reflectance value lrv is a measure of visible and usable light that is reflected from a surface when illuminated by a light source.

Light reflectance value test method.

1 2 the test method is suitable for use with most object color specimens. Brightness is a commonly used industry term for the numerical value of the reflectance factor of a sample with respect to blue light of specific spectral and geometric characteristics. In the absence of an australian or international standards organization iso test method cial determined that british standard bs 8493 2008 light reflectance value lrv of a surface method of testis the most appropriate standard for determining the spectral reflectance of carpets using a spectrophotometer. 1 1 this test method describes the instrumental measurement of the reflection properties and color of object color specimens by the use of a spectrophotometer or spectrocolorimeter with a hemispherical optical measuring system such as an integrating sphere.

Light reflectance value lrv testing for areas where people with visual impairment may be present light reflectance values are important for ensuring noticeable differentiation between materials. This publication is primarily centered on requirements used to assist the disabled including the visually impaired. Bs 8493 specifies the method of test to determine the light reflectance value lrv of different surfaces of materials. Bs 8493 2008 a1 2010 light reflectance value lrv of a surface.

Lrv is the proportion of visible light reflected by a surface compared to the sensitivity to light of the human eye. This method requires an instrument employing diffuse illumination and 0 viewing geometry. Light reflectance value testing in 2013 access to and use of buildings was published within the building regulations. The measurement is most commonly used by design professionals such as architectural color consultants architects environmental graphic designers and interior designers.

Method of test category. Bs 8493 applies to. A method of light reflectance measurement by lun ke b sc computer science tsinghua university 1993 a thesis submitted in partial fulfillment of the requirements for the degree of master of.