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:
Apr. 19, 1988
Filed:
Dec. 10, 1986
Richard H Bolton, Rushville, NY (US);
Eastman Kodak Company, Rochester, NY (US);
Abstract
A manually-focused video camera provides a movie image for an electronic viewfinder and a still image for recording apparatus. A diaphragm in the optical section of the camera determines the optical aperture presented to incoming image light, which coincidentally establishes the depth of field in which the subject remains in focus. When the aperture necessary for a still image exceeds the aperture used for the movie image by, e.g., three aperture stops, a warning system in the camera produces a control signal. The existence of this signal indicates a potential focusing problem due to the disparity between aperture values and the reduced depth of field in the corresponding still image. The signal is used, e.g., to illuminate a warning element in the viewfinder or to insert a neutral density filter into the path of incoming light, in the latter case forcing the movie aperture to approach the still aperture and thereby causing the movie depth of field to approach the still depth of field.