Photographic flash apparatus

Details Photographic flash apparatus Photographic flash apparatus

1990-06-18

1991-02-05

Husar, Stephen F.

Illumination

Photographic lighting

Including specific light modifier

362282, 362308, F21Y 1304

Patent

active

049910639

ABSTRACT:
In a photographic flash apparatus, a flash tube produces a brilliant flash of light, a reflector concentrates the light produced by the flash tube into a beam having a particular angle of coverage and redirects the light toward a subject to be illuminated, and an optical element is positioned across the beam to change the angle of coverage of the beam from that effected by the reflector. According to the invention, the optical element is supported for movement only within the beam, but out of its position crosswise of the beam to permit the reflector to restore the beam substantially to the angle of coverage effected by the reflector. This provides an improved compact design for use with dual mode telephoto/wide angle cameras, for example.

REFERENCES:
patent: 3167256 (1965-01-01), Elliott
patent: 3843878 (1974-10-01), Ueda et al.
patent: 4066884 (1978-01-01), Taylor
patent: 4084168 (1978-04-01), Pizzuti et al.
patent: 4171887 (1979-10-01), Hayata
patent: 4175279 (1979-11-01), Asaki
patent: 4176930 (1979-12-01), Imura
patent: 4333127 (1982-06-01), Alkewa et al.
patent: 4352546 (1982-10-01), Iwata et al.
patent: 4666280 (1987-05-01), Miyawaki et al.

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