F-Number vs. Illumination for Drive-in Theaters
One of the problems involved in the operation of drive-in theaters as opposed to in-door theaters is that of illumination. For example, screen brightness levels for an indoor theater may be 12 to 16 fL, whereas brightness levels of drive-in theaters are usually no more than 8 fL. Informed selection of projection lenses will aid in improving screen illumination. Tests were made of various lenses and illumination techniques to determine the best solution of the drive-in illumination problem.
- Print ISSN
- 0361-4573
- Published
- 1969-10
- Content type
- Original Research
- DOI
- 10.5594/J10795
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