Lens-fitted photographic film unit
AssigneeFuji Photo Film Co., Ltd.
InventorMitsuhiro Moriya
Life of this patent
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Abstract
There is disclosed a lens-fitted photographic film unit preloaded with an unexposed photographic film. A light regulating filter is disposed between the photographic film and a shutter blade. Light from a subject is applied to the light regulating filter only when the shutter blade is opened. The light regulating filter is obtained by coating a base with an electrochromic material, and light transmittance thereof is changed depending on a voltage to be applied. When a photometric switch is turned on, a photometric circuit measures brightness of the subject. According to the brightness of the subject, a controller controls the voltage to be applied to the light regulating filter.
Claims6
A lens-fitted photographic film unit preloaded with an unexposed photographic film comprising:
- a shutter blade swingable between a closing position and an opening position, said photographic film being exposed by light from a subject at said opening position;
- a light regulating member disposed between said shutter blade and said photographic film, light transmittance of said light regulating member being changed depending on a voltage;
- and
- a driver for applying said voltage to said light regulating member.
Dependencies are inferred from the claim text.