The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 01, 1987
Filed:
Sep. 23, 1985
Makoto Ando, Osaka, JP;
Abstract
An automatic focusing camera includes a camera body and an interchangeable objective lens. The camera body includes a detector device exposed to the object image and a circuit providing a signal of a value in accordance with the detector device sensed difference between the object image, a predetermined focal plane and a circuit responsive to the signal for controlling a motor to rotate an amount in accordance with the signal. The objective lens includes a stationary front lens and an axially movable focusing lens which axially moves with a follower engaging the cam way of a cylindrical cam which is gear rotated by the separably coupled motor shaft. The cam is shaped whereby .DELTA..theta.=C.multidot..DELTA.L wherein .DELTA..theta. is the amount of rotation of the motor, .DELTA.L is the axial movement of the object image and C is a constant depending on the objective lens which has a ROM having information in accordance with C and which is separably coupled to the motor control circuit.