Emission angle variable flash apparatus
AssigneeWest Electric Company, Ltd.
InventorsKatsumi Horinishi, Akira Iwamoto, Mitsuo Fuke, Katsunori Kawabata, Shinji Ando
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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.
Claims4
An emission angle variable flash apparatus comprising a light source for emitting flash and a reflector for reflecting the flash from the light source to an emission subject, said apparatus being capable of varying emission angles of a direct light from the light source and a reflected light from the reflector to the emission subject, wherein
- side reflection means are disposed oppositely to both side surfaces of the reflector so as to reflect the flash from the light source in the horizontal direction,
- the light source and the reflector are so constituted that a distance therebetween on their common optical axis may be variable,
- the side reflection means are so constituted that an angular aperture to be formed thereby may be variable, and
- an emission angle control means is provided to control the changes of the distance between the light source and the reflector and the angular aperture to be formed by the side reflection means.
Dependencies are inferred from the claim text.