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:
Nov. 04, 1986
Filed:
Oct. 16, 1984
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Abstract
An automatic focusing device for a video camera includes a projector for projecting an infrared ray used for measuring distances and a converging lens for focusing reflected infrared ray light from an object whose distance is to be measured. A light spot detector and a computer are provided for determining whether the video camera is in focus. A lens encoder is utilized to determine the position of a focusing lens and a lens driving unit moves the position of a photographic lens used for photographing the object forwardly or backwardly in dependence upon outputs from the lens encoder and computer so as to automatically focus the video camera in response to the infrared rays reflected from the object to be photographed.