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:
Oct. 20, 1998
Filed:
Nov. 12, 1997
Hiroyuki Kawamura, Omiya, JP;
Hiroshi Mizumura, Omiya, JP;
Fuji Photo Optical Co., Ltd., Saitama, JP;
Abstract
A TV camera lens of the present invention is provided with a position-control signal generating means for outputting a position-control signal representing a position where a master lens group should be positioned, and a rate-control signal generating means for outputting a rate-control signal representing a rate at which the master lens group should be moved. A position/rate control changeover means validates one of the position-control signal generating means and the rate-control signal generating means. A control circuit drives a motor to move the master lens group according to the rate-control signal or the position-control signal which is validated by the position/rate control changeover means. The TV camera lens is also provided with a limit circuit. A limit position, at which the master lens group stops when the master lens group moves under the rate control, is set to a proper flange back length position, which is adjusted under the position control. Thus, the master lens group can return to a previously-adjusted flange back length position under the rate control without fail.