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Proceedings Paper

Light sources for reproduction of holographic images
Author(s): Naoyoshi Nameda; Gert von Bally; Hitoshi Ohzu
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Paper Abstract

The characteristics of incoherent light sources affecting reproduction of a holographic image is never found in lamp manufacturer's literature on their product. The lamp characteristics that manufacturers list, such as light intensity, illuminant values, beam angles, and etc. But, these values are no relation with the reproduced image characteristics of a hologram. For a reflection type holography such as Lippmann holography, an incoherent light source, frequently a halogen or incandescent lamp, used to reconstruct the image. This report concerns how to measure the reproducible characteristics for these lamps. These lamps are evaluated by using deep or protruded image reproduction of the hologram. This hologram was of a test-chart located several millimeters under a film. When the hologram is viewed, the most desirable light source is the best resolution of the test chart. This lighting position was investigated by ray tracing, locating a pin hole on front of the lamp. As a result, light rays had no intersection. Where intersecting rays existed, the resolution of the image was the worst.

Paper Details

Date Published: 19 November 2003
PDF: 2 pages
Proc. SPIE 4829, 19th Congress of the International Commission for Optics: Optics for the Quality of Life, (19 November 2003); doi: 10.1117/12.527027
Show Author Affiliations
Naoyoshi Nameda, Fukuoka Institute of Technology (Japan)
Gert von Bally, Univ. Muenster (Germany)
Hitoshi Ohzu, Waseda Univ. (Japan)

Published in SPIE Proceedings Vol. 4829:
19th Congress of the International Commission for Optics: Optics for the Quality of Life
Giancarlo C. Righini; Anna Consortini, Editor(s)

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