Photography – With object illumination for exposure – Having exposure synchronizer
Reexamination Certificate
1999-09-01
2001-04-24
Perkey, W. B. (Department: 2851)
Photography
With object illumination for exposure
Having exposure synchronizer
C396S429000
Reexamination Certificate
active
06222998
ABSTRACT:
BACKGROUND OF THE INVENTION
The present invention relates to a camera and, more particularly, to an improved camera for controlling the light emission timing of an electronic flash device that can be applied to a silver halide photographing/electronic image sensing camera having both the function of an electronic image sensing device with an electronic image sensing element for converting an object image into an electrical signal, and the function of a silver halide photographing device for exposing an object image on a silver halide film.
In recent years, silver halide photographing cameras which confirm a photographed object image have been developed.
For example, Jpn. Pat. Appln. KOKAI Publication Nos. 1-114169, 10-20392, and 10-48730 disclose an electronic image sensing/silver halide photographing camera integrated with an electronic image sensing device for converting an object image into an electrical signal and a silver halide photographing device for photographing an object image on a silver halide film.
Japanese Patent No. 2,707,535 discloses a camera having different timings between photographing on a film and image sensing on a solid-state image sensing element.
In flash photography, flashlight is emitted in synchronism with the exposure timing on the film, and flashlight is emitted in synchronism with the exposure timing on the solid-state image sensing element.
However, Jpn. Pat. Appln. KOKAI Publication Nos. 1-114169, 10-20392, and 10-48730 do not disclose any camera operation in flash photography.
In Japanese Patent No. 2,707,535, the exposure timing on the film and the image sensing timing on the solid-state image sensing element are different from each other. If an object is moving, an image exposed on the film and an image exposed on the solid-state image sensing element become different from each other.
Further, in Japanese Patent No. 2,707,535, in flash photography, flashlight is emitted in synchronism with the exposure timing on the film, and flashlight is emitted in synchronism with the exposure timing on the solid-state image sensing element.
That is, flashlight must be emitted twice in one photographing cycle, wasting flash energy.
BRIEF SUMMARY OF THE INVENTION
It is an object of the present invention to provide a silver halide photographing/electronic image sensing camera capable of simultaneously taking pictures with a silver halide photographing device and electronic image sensing device without wasting flash energy.
To achieve the above object, according to one aspect of the present invention, there is provided a camera for exposing an object image on a silver halide film, comprising:
a shutter for adjusting an object beam which reaches the silver halide film;
an electronic flash device for irradiating an object with flashlight;
an electronic image sensing element for converting the object image into an electrical signal; and
a timing circuit for outputting a first timing signal for designating a light emission timing of the electronic flash device after the shutter is opened, and outputting a second timing signal for starting operating the electronic image sensing element in synchronism with the first timing signal.
According to another aspect of the present invention, there is provided a camera for exposing an object image on a silver halide film, comprising:
a release operation member;
a shutter device for performing exposure operation on the silver halide film in response to operation of the release operation member;
an electronic flash device for irradiating an object with flashlight when the shutter device is opened; and
an electronic image sensing device for starting operating after start of light emission from the electronic flash device, and sensing an image corresponding to the object image exposed on the silver halide film.
According to still another aspect of the present invention, there is provided a camera for exposing an object image on a silver halide film, comprising:
a release operation member;
a shutter device for performing exposure operation on the silver halide film in response to operation of the release operation member;
an electronic flash device for irradiating an object with flashlight when the shutter device is opened full; and
an electronic image sensing device for starting image sensing operating prior to start of light emission from the electronic flash device, and stopping the image sensing operation during light emission from the electronic flash device.
According to still another aspect of the present invention, there is provided a camera using a silver halide film, comprising:
silver halide photographing means for performing exposure operation on the silver halide film;
electronic flash means for irradiating an object with flashlight during exposure operation by the silver halide photographing means;
electronic image sensing means for converting an object image into electronic image data; and
control means for controlling a light emission timing of the electronic flash means, and image sensing start and stop timings of the electronic image sensing means so as to make an object image exposed on the silver halide film and an object image sensed by the electronic image sensing means coincide with each other.
Additional objects and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objects and advantages of the invention may be realized and obtained by means of the instrumetalities and combinations particularly pointed out hereinafter.
REFERENCES:
patent: 5774750 (1998-06-01), Honda
patent: 5867741 (1999-02-01), Maruyama et al.
patent: 6101333 (2000-08-01), Bullit et al.
patent: 1-114169 (1989-05-01), None
patent: 2707535 (1997-10-01), None
patent: 10-20392 (1998-01-01), None
patent: 10-48730 (1998-02-01), None
Frishauf, Holtz Goodman, Langer & Chick, P.C.
Olympus Optical Co,. Ltd.
Perkey W. B.
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