Auto focus camera
AssigneeAsahi Kogaku Kogyo Kabushiki Kaisha
InventorIsamu Hirai
Life of this patent
Estimating the term…
Abstract
An autofocus camera having a plurality of object distance measuring zones and a photographing lens system. A distribution pattern of objects is deflected in the object distance measuring zones in accordance with object distances of the objects. An axial position of at least a part of the photographing lens system is adjusted in the optical axis direction to detect the position of the focal plane so that the focal plane can be varied. The adjusting of the axial position of at least a part of the lens system and the varying of the focal plane are driven in accordance with the distribution pattern of the objects so that the focal point of the photographing lens meets the objects.
Claims14
An autofocus camera comprising a plurality of object distance measuring zones, and a detector that detects a distribution pattern of objects in said plurality of object distance measuring zones, said detector further comprising means for detecting said distribution pattern of objects in said plurality of object distance measuring zones and means for simultaneously setting a focus on objects in at least two of said plurality of object distance measuring zones, by adjusting a field of curvature to bring said plurality of object distance measuring zones into focus.
An autofocus camera comprising a plurality of object distance measuring zones, and a detector that detects a distribution pattern of objects in said plurality of object distance measuring zones, wherein said distribution pattern of objects in said plurality of object distance measuring zones is detected by said detector and is used for simultaneously setting a focus on objects in at least two of said plurality of object distance measuring zones, by adjusting a focal plane of said camera to bring said plurality of object distance measuring zones into focus, wherein said adjusting of said focal plane comprises means for adjusting an angle of an optical axis of a lens associated with said camera with respect to a film plane associated with said camera.
A camera, comprising:
- a plurality of object distance measuring zones;
- means for varying an orientation of a field curvature;
- and
- means for detecting a distribution pattern of objects in said plurality of object distance measuring zones, said detecting means controlling said field curvature varying means to set an in-focus condition with respect to objects in at least two of said plurality of object distance measuring zones.
A camera, comprising:
- a plurality of object distance measuring zones;
- means for varying a focal plane of said camera;
- and
- means for detecting a distribution pattern of objects in said plurality of object distance measuring zones, said detecting means controlling said focal plane varying means to set an in-focus condition with respect to objects in at least two of said plurality of object distance measuring zones, wherein said focal plane varying means comprises means for adjusting an angle of an optical axis of a lens associated with said camera with respect to a film plane associated with said camera.
An image forming apparatus, comprising:
- a variable position focal plane;
- a plurality of object distance measuring zones;
- and
- a detector that detects a distribution pattern of objects in said plurality of object distance measuring zones so as to control a varying of an orientation of said variable position focal plane with respect to a field curvature and obtain an in-focus condition with respect to objects in at least two of said plurality of object distance measuring zones.
An image forming apparatus, comprising:
- a variable position focal plane;
- a plurality of object distance measuring zones;
- and
- a detector that detects a distribution pattern of objects in said plurality of object distance measuring zones so as to control a varying of said variable position focal plane and obtain an in-focus condition with respect to objects in at least two of said plurality of object distance measuring zones, wherein said variable position focal plane comprises means for adjusting an angle of an optical axis of a lens associated with said image forming apparatus with respect to a film plane associated with said image forming apparatus.
Dependencies are inferred from the claim text.