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:
Mar. 10, 1981
Filed:
Jul. 03, 1979
Katahira Yukio, Sayama, JP;
Osawa Precision Industries, Ltd., Tokyo, JP;
Abstract
The optical system includes a variator lens and a compensator lens each adapted for cammed axial movement along the optical axis in response to rotation of a cam tube for varying the focal length of the system in a normal zoom range between a telephoto condition and a wide-angle condition. A control member is coupled to the cam tube and is shiftable between a normal range condition for preventing axial movement of the cam tube during focusing in the normal zoom range and a macrophotographic range condition which effects a cammed axial movement of the cam tube in response to rotation thereof for focusing the system in a macrophotographic range. Radially shiftable and axially shiftable control mechanisms are disclosed.