Cold-Mirror Lamps for 8mm Projectors
Cold mirror coatings have been incorporated into reflector lamps (or use in the home 8mm motion-picture projector. Light output shows little or no loss, whereas the total energy absorbed by the film has been reduced by 50% for some films. Methods for testing these lamps are shown. Problems of coating uniformity, visible light reflectance, infrared transmission, and color bias are discussed.
- Print ISSN
- 0361-4573
- Published
- 1963-09
- Content type
- Original Research
- DOI
- 10.5594/J07283
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