goniophotometer

goniophotometer

[¦gō·nē·ō·fə′täm·əd·ər]
(optics)
A photometer designed to measure the intensity of light reflected from a surface at various angles.
References in periodicals archive ?
The Rhopoint IQ Gloss-Haze-DOI-Goniophotometer has been established as the reference instrument for measuring reflective appearance like gloss, haze, distinctiveness of image (DOI) &c goniophotometer curves.
Together with the existing Type C Goniophotometer and the Integrating Sphere-Spectrometer System, Intertek Hong Kong now offers a complete solution on LED testing to cater the increasing market demand.
using a Micro-TRI-Gloss Glossmeter from BYK Gardner and a Rhopoint IQ goniophotometer from Rhopoint Instruments Ltd.
The luminance data can be: a) measured for existing luminaires, using a near-field goniophotometer, or b) inserted in simulation software using ray data as individual rays or surface sources.
A moving-mirror, Type-C goniophotometer (Independent Testing Laboratories, Boulder, CO) was equipped with a specialized UVGI reflective mirror (Milcure 1000 aluminum reflector sheet, Miltec UV, Stevensville, MD) and GigaHertz-Optik model P9710 optometer with model UV-3718--2 flat UV sensor (Puchheim, Germany).
A goniophotometer and a goniospectrophotometer (Gretag Macbeth--CE-741-GL) were used to verify the pearlescent properties and brightness of the obtained samples.
HunterLab also has introduced a portable goniophotometer for evaluating the quality of high-gloss finishes.
The firm also offers a Dorigon Abridged Goniophotometer for measuring distinctness of image of metallic and nonmetallic surfaces.
Customers can choose integrated measurements from a 2-meter sphere or 3-D measurements from a Type C Goniophotometer to visualize and predict the photometric performance of an installed luminaire.
Ballast testing, reflector/refractor design goniophotometer
The Center will feature the latest LED lighting testing equipment, including a full-field goniophotometer and an integrating sphere, measuring all aspects of the science of light, environmental reliability, and other product and component analysis.
Without going into detail, both IES LM-31-95 [IESNA 1995] and LM-35- 02 [IESNA 2002] specify the measurement of luminous intensity distribution using a goniophotometer that is mounted in a large room with black surfaces.