Ricoh Company, Ltd.

Hirofumi Horigome

Susumu Iguchi

Yoshio Fukushima

Kunihiko Araki

Satoshi Yamane

Yoshimi Ono

Koichi Nishi

Hideaki Akiyama

Tadafumi Ohguro

A device for indicating the current focus condition of an auto-focus system for use in a camera and the like includes an indication processing circuit interposed between an arithmetic processing circuit, which receives distance information to an object of interest, and an indicator/controller. The indication processing circuit allows to maintain the detected in-focus condition sufficiently long so that an observer can judge the proper focus condition even if the object is in slight motion, or the camera is being held by hands.

Focus condition indicating device of an auto-focus system

A device for driving to move a focusing lens of an auto-focus system depending upon the current focus condition for use in a camera and the like includes an focusing lens driving processing circuit interposed between an arithmetic processing circuit, which receives distance information to an object of interest, and an indicator/controller. The driving processing circuit allows to maintain the detected in-focus condition sufficiently long so that the lens is prevented from executing unnecessary reciprocating movement and stability in operation is insured even if the object is in slight motion, or the camera is being held by hands.

Lens driving device of an auto-focus system

A film advancing system of a camera in which a roll of film inside a film cartridge is first wound to a spool and then the film is rewound into the cartridge one frame from another after each photographic operation is provided. The system includes a reversibly rotatable motor the drivement and rotational direction of which are automatically controlled depending upon various conditions of the camera to implement required advancement of the film.

Film feeding system of a camera

A method and apparatus for adjusting the view finder of a single-lens reflex camera in which method and apparatus the adjustment of the angle of the swingable mirror and the adjustment of the optical distance from the taking lens to the focusing screen via the swingable mirror are both performed in respect of the swingable mirror after the focusing screen has been set in place in the camera, thus obviating the need for a variety of shims that would otherwise be necessary in positioning the focusing screen at precisely the proper position from the swingable mirror.

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Kawasaki, Japan

Hirofumi Horigome