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:
Dec. 07, 1999
Filed:
May. 12, 1998
Yoshihisa Kitagawa, Kasukabe, JP;
Nikon Corporation, Tokyo, JP;
Abstract
An auto-focus camera for performing focusing adjustment of a focusing lens group to actualize an in-focus state, that includes an auto-focusing adjustment unit to move the focusing lens group along an optical axis based on a detection signal, and an in-focus state detection unit to detect the in-focus state and output a corresponding output signal. The auto-focusing adjustment unit performs the focus adjustment using the output signal of the in-focus state detection unit as the detection signal. The auto-focus camera also includes a displacement detection unit to detect displacement of the photographic optical system along the optical axis and to output a corresponding output signal. The auto-focusing adjustment unit switches the detection signal from the output signal of the in-focus state detection unit to the output signal of the displacement detection unit to enable continued focusing adjustment throughout the photographic operation, including during an exposure process.