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Abstract

The All-Russian Institute for Optical and Physical Measurements (VNIIOFI) and Physikalische Technische Bundesanstalt (PTB) have collaborated in a study where measurements were carried out at both laboratories to compare the values of luminous intensity, photometric responsivity and luminous flux assigned to artifacts.

At VNIIOFI the primary standard of luminous intensity is a high-temperature blackbody. A (primary) photometer transfer the unit to a group of luminous intensity standard lamps, which are used for the maintenance of the unit. Luminous intensity and illuminance calibrations are carried out as substitution method with groups of standard lamps and V(lambda)-corrected (silicon) photometers. The luminous flux calibrations are carried out by means of a group of luminous flux reference standard lamps and a 2-meter integrating sphere.

At PTB, the photometric base unit of luminous intensity is realized annually based on radiometric power measurements with absolute radiometers. The unit is maintained by groups of incandescent lamps. The luminous flux unit is derived fundamentally from the luminous intensity unit by goniophotometric methods and maintained by incandescent lamps. ps.

Additional information

Authors: LINDNER D, Physikalisch Technische Bundesanstalt, Braunschweig (DE);SAUTER G, Physikalisch Technische Bundesanstalt, Braunschweig (DE);LINDEMANN M, Physikalisch Technische Bundesanstalt, Braunschweig (DE);STOLYAREVSKAYA R I, All-Russian Research Institute for Optical and Physical Measurements, Moscow (RU)
Bibliographic Reference: Report: EN (1996) 16pp.
Availability: Available from Physikalisch Technische Bundesanstalt, Bundesallee 100, 38116 Braunschweig (DE)
ISBN: ISBN 3-89429-811-1
Record Number: 199710364 / Last updated on: 1997-04-23
Category: PUBLICATION
Original language: en
Available languages: en
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