Optical finder system for a video camera
AssigneeNippon Kogaku K.K.
InventorsYozo Iida, Soichi Nakamura
Life of this patent
Estimating the term…
Abstract
There is described an optical finder system for use with video cameras of the type having a tri-color separation color filter. Positioned in the finder optical path is an optical member onto which the image of an object to be picked up is projected and the optical member has an irregular pattern which is the same or similar to that of the color filter, whereby Moire fringes similar to those produced by the object image in cooperation with the color filter are produced on the finder focussing or imaging surface.
Claims5
In a video camera including a pickup device for converting a first optical image of an object formed on an image pickup surface by an imaging optical system into an electric signal, and an optical finder system whereby a second optical image substantially identical with said first optical image is formed on an imaging surface such that said second optical image on said imaging surface is observable through an eyepiece, said pickup device including color separating filter means disposed on said image pickup surface and having a fine stripe or mosaic pattern, the improvement comprising:
- optical means disposed in close proximity to said imaging surface of said optical finder system across an optical axis in such a manner that said second optical image is projected onto a surface of said optical means, said optical means including a plurality of fine optical elements arranged in a pattern similar to said fine pattern of said filter means.
Dependencies are inferred from the claim text.