Emission angle variable flash apparatus

Details Emission angle variable flash apparatus Emission angle variable flash apparatus

1996-09-16

1998-03-31

Gray, David M.

Photography

Flash system responsive to focal length or distance

Illumination angle responds to focal length or distance

396175, 396200, 362 18, G03B 1502, G03B 1506

Patent

active

057349347

ABSTRACT:
An emission angle variable flash apparatus of the invention alters an angular aperture to be formed by side reflection plates disposed oppositely to both side surfaces of a reflector in linkage with a change of a distance between a Xe tube and a reflector on their optical axis, thereby enhancing the efficiency of utilization of flash from a light source and expanding a variable range of an emission angle in the horizontal direction. As a result, the emission angle variable flash apparatus of the invention is made smaller in size than in the prior art.

REFERENCES:
Patent Abstracts of Japan, Publ. No. 55129326, dated Oct. 10, 1980.
Patent Abstracts of Japan, Publ. No. 02291538, dated Dec. 3, 1990.

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