Notes on the Cos4Law of Illumination
- 1 November 1948
- journal article
- Published by Optica Publishing Group in Journal of the Optical Society of America
- Vol. 38 (11) , 980-986
- https://doi.org/10.1364/josa.38.000980
Abstract
The formulae for the distribution of illumination in the focal plane of a lens system without and with distortion are derived. These formulae are applied to some extreme wide-angle lenses, and a numerical example is included. Special attention is given to the distortion of the pupils and the importance of stop position for illumination. The formula for the illumination distribution in a monocentric system is derived.Keywords
This publication has 4 references indexed in Scilit:
- Lenses of Extremely Wide Angle for Airplane MappingJournal of the Optical Society of America, 1948
- Validity of the cosine-fourth-power law of illuminationJournal of Research of the National Bureau of Standards, 1947
- The Cos^4 Law of Illumination*Journal of the Optical Society of America, 1945
- LXXXIX. A wide angle lens for cloud recordingJournal of Computers in Education, 1922