Method and gonioradiometer for the direction-dependent measurement of at least one lighting or radiometric characteristic variable of an optical radiation source

US10180349B2 · kind B2 · utility

Assignee

• LMT LICHTMESSTECHNIK GMBH BERLIN · DE

Inventors

• Raymund HAMMER · Berlin, DE
• Carsten Diem · Ludwigsburg, DE
• Horst-Guenther Ulrich · Berlin, DE
• Thomas Reiners · Giengen an der Brenz, DE

Key dates

• Filing date: Jan 8, 2016
• Grant date: Jan 15, 2019
• Expiry date: Jan 8, 2036

Classification

• Technology area (CPC —): General

Abstract

The invention relates to a gonioradiometer for the direction-dependent measurement of at least one lighting or radiometric characteristic variable of an optical radiation source (2), having: an apparatus for moving a radiation source (2) during a measurement operation about a first axis (31) and about a second axis (32) that is perpendicular to the first axis (31); a measuring wall (5) exhibiting homogeneous reflection, on which the light from the radiation source (2) is reflected; and a locationally fixed and immovably arranged camera (7) having an optical unit (8) and a two-dimensional sensor chip (100). The camera (7) is arranged such that it captures light reflected on the measuring wall (5), wherein the reflected light is imaged by the optical unit (8) of the camera (8) onto the sensor chip (100) of the camera (7), and wherein the sensor chip (100) records measurement values as the radiation source (2) is rotated during a measurement operation, which measurement values indicate the lighting or radiometric characteristic variable substantially on a spherical surface about the radiation centroid of the radiation source (2). The invention furthermore relates to a method and a gon…