SPECIAL REPORT ON AN INTEGRATING SPHERE LIGHT SOURCE,

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Abstract:

Work performed at Armour Research Foundation to develop a light source having a uniform Lambertian surface. A uniform Lambertian surface has these two important properties 1 the intensity of the light emitted by a point on the surface is equal for all points on the surface, and 2 the intensity of light emitted from an infinitesimal area in a particular direction varies as cos theta, where theta is the angle between the normal to the emitting surface and the direction of measurement. The preliminary systems investigated, which did not satisfy the design requirements, are described. On the basis of this investigation it was concluded that the utilization of an integrating sphere system offered the most feasible approach to this task. The characteristics of the final integrating sphere system are described in detail. This system has several modes of operation. Uniformity and goniometric measurements were performed to determine the characteristics for the various system arrangements. This data is presented in graphical and tabular form. Author

Author(s):
Weiner, M. R. ; Pontarelli, D. A. ; Betz, H. T. ; Davis, W. J. ; Fenlon, P. F.
Author Organization(s):
IIT RESEARCH INST CHICAGO ILL
Annotation:
Development of a light source with a uniform Lambertian surface.
Pagination:
0035

Security Markings

DOCUMENT & CONTEXTUAL SUMMARY

Distribution:
Approved For Public Release

RECORD

Collection: TR
Identifying Numbers
Report Number(s):
E158 47
Contract/Grant Number(s):
NOrd16969
 Subject Terms
Communities of Interest:
No COI(s) Identified
Descriptor(s):
*LIGHT, SOURCES, SPHERES, INTENSITY, SURFACE PROPERTIES, MEASUREMENT, EMISSIVITY, DIFFUSION, REFLECTION, PAINTS, ILLUMINATION, GONIOMETERS, EXPERIMENTAL DATA, TABLES(DATA), WATER, BRIGHTNESS
Report Date:
1963 Mar 01