Specifications

MODEL 370 REV: D Page 21 of 26
By using either the UDT Instruments Model 129 LED shade or by making a
laboratory setup as shown in Figure E-7 the luminous or radiant intensity of an
LED or lamp may be measured. The procedure is similar to that of Section 6.3.
6.5.2 Transmission and Absorption Measurements
By interposing a sample between the light source and detector, the transmission or
absorption of a sample may be measured.
6.6 Bibliography
IES Lighting Handbook, Kaufman & Christensen,
Illuminating Engineering Society,
345 E. 47th St.
New York, N.Y. 10017
The Optical Industry and Systems Directory
Compiled and Edited by the Optical Publishing Co., Inc.,
P.O. Box 1146
Pittsfield, MS 01201
Focal Encyclopedia of Photography,
ed. By F. Purves, Focal Press Ltd.
31 Fitzroy Square,
London, W.1
Radiometric Calibration: Theory and Methods,
Clair L. Wyatt,
Academic Press,
111 Fifth Avenue
New York, NY 10003
Handbook of Lasers with Selected Data on Optical Technology
ed. by Robert J. Pressley,
The Chemical Rubber Company
18901 Cranwood Parkway
Cleveland, OH 44128
Color Science, Wyszecki & Stiles,
John Wiley & Sons, Inc., NY
6.6 Formulas
1. Speed of Photographic Materials
E = Film exposure for an acceptable print measured in
lux-sec)
ASA index = 1/(4E)
DIN index = (10 log E) -5
2. Illumination of camera image plane
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