Lummer-Brodhun sight box

Lummer-Brodhun sight box

[′lu̇m·ər ′brȯd‚hu̇n ′sīt ‚bäks]
(optics)
A device, having a series of prisms, for viewing simultaneously the two sides of a white diffuse plaster screen illuminated by light sources whose luminous intensities are being compared.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
Mentioned in ?