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:
Sep. 08, 1987
Filed:
Feb. 28, 1986
Mark Rice, Minneapolis, MN (US);
Douglas Meisner, Minneapolis, MN (US);
Interscan, Incorporated, Minneapolis, MN (US);
Abstract
A video viewfinder system according to the preferred teachings of the present invention is shown for use with a camera of a standard design. The video viewfinder system includes video monitors for displaying derived images from a video camera of a primary image formed by the lens of the camera to allow the photographer to view the primary image formed by the camera lens at locations remote from the camera. Specifically, the video viewfinder system of the preferred form includes a viewfinder hood secured to the camera having a ground glass located at its first end for forming the primary image by the camera lens and with the video camera located at its second end and aimed at the primary image. To provide more uniform brightness of the derived image, a fresnel lens is associated with the ground glass for concentrating the outgoing light rays from the ground glass to the video camera and an anti-vignetting filter having gradating density from its center outward is provided for selectively absorbing the outgoing light rays from the ground glass to the video camera.