Infra-Red Photography in Motion Picture Work
Photographs by infra-red light were first made some years ago by Professor R. W. Wood, of Johns Hopkins University. He noted that the most striking features of these pictures were that blue skies were rendered very dark, whereas green foliage was rendered very light. Photographs by infra-red light with these characteristics have remained more or less of a scientific curiosity every since. In Professor Wood's day the available photographic sensitivity in the infrared was very low and the required exposure very long; furthermore, no one had pointed out a practical use for this effect. More recently Haller has announced an infra-red sensitizer which gives considerably increased speed and this, in combination with the Technicolor film sensitizing technique, has made possible a film semitized in the infra-red which can be produced uniformly and economically in any quantity, large or small, and of sufficient speed to allow of good exposures in motion picture work.
- Print ISSN
- 0096-6460
- Published
- 1925-09
- Content type
- Original Research
- DOI
- 10.5594/J10347