Automatic focussing apparatus
First Claim
1. An automatic focussing apparatus, comprising:
- a first battery internally housed within a camera which is adapted to mate with a taking lens barrel;
a second battery internally housed within the lens barrel;
a camera operating member disposed on the camera;
a lens operating member disposed on the lens barrel;
an in-focus detector circuit disposed within the camera for detecting an in-focus condition on an imaging surface and for providing information which is utilized to drive a taking lens toward an in-focus position;
a motor drive circuit disposed within the lengs barrel and including a motor for moving the taking lens to an in-focus position in accordance with the information fed from the in-focus detector circuit;
first feed means for feeding the in-focus detector circuit from the first battery when the camera operating member is operated;
second feed means capable of feeding said motor drive circuit from said second battery and feeding said in-fo detector circuit through a contact dispose between said lens barrel and said camera body when said lens operating member is operated;
and actuating means for actuating said second feed means when said camera operating member is operated.
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Accused Products
Abstract
An automatic focussing apparatus includes an operating switch disposed on a camera which may be closed to energize an in-focus detector circuit from a battery contained within the camera and to energize a motor drive circuit from another battery contained within a lens barrel. The apparatus also includes an operating switch mounted on the lens barrel which may be turned on to energize the in-focus detector circuit and the motor drive circuit from a battery disposed within the lens barrel.Focussing signals representing the magnitude and direction of lens movement from the focussing processor may be coupled to the motor control circuit through two control lines in one embodiment or only one control line in a second embodiment.
16 Citations
16 Claims
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1. An automatic focussing apparatus, comprising:
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a first battery internally housed within a camera which is adapted to mate with a taking lens barrel; a second battery internally housed within the lens barrel; a camera operating member disposed on the camera; a lens operating member disposed on the lens barrel; an in-focus detector circuit disposed within the camera for detecting an in-focus condition on an imaging surface and for providing information which is utilized to drive a taking lens toward an in-focus position; a motor drive circuit disposed within the lengs barrel and including a motor for moving the taking lens to an in-focus position in accordance with the information fed from the in-focus detector circuit; first feed means for feeding the in-focus detector circuit from the first battery when the camera operating member is operated; second feed means capable of feeding said motor drive circuit from said second battery and feeding said in-fo detector circuit through a contact dispose between said lens barrel and said camera body when said lens operating member is operated; and actuating means for actuating said second feed means when said camera operating member is operated. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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Specification