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US 5,134,468 AGranted
Optical apparatus for varying the lengths of optical path of color component light beams
AssigneeCanon Kabushiki Kaisha
InventorRyuji Ohmuro
Life of this patent
Estimating the term…
Abstract
An optical apparatus comprising an objective lens for producing a light bundle, a color separation prism receptive of the light bundle for producing two or more component light beams, two or more solid-state image sensors arranged behind the respective spaces between the exit faces of the prism in fixedly secured relation, and optical means arranged in all but one of the spaces between the exit faces of the prism and the image sensors to vary the lengths of the optical paths.
Claims17
An optical apparatus comprising:
- an optical assembly having an entrance face and a plurality of exit faces, for receiving a light bundle from an objective lens through said entrance face, and for splitting the light bundle into a plurality of individual component light beams and emitting said individual component beams from said exit faces respectively;
- a plurality of image sensing devices for respectively receiving the individual component light beams from said exit faces and forming electrical signals therefrom, each sensing device being disposed to cause a distance from a respective exit face of said optical assembly to an image receiving surface of a respective sensing device to be kept constant;
- and
- a plurality of optical means respectively arranged in spaces between said exit faces of said optical assembly and said respective image sensing devices for changing the lengths of the optical paths between the respective exit faces and image receiving surfaces, at least one of said optical means comprising two movable parallel plates with a flexible material disposed therebetween on an optical axis of said one optical means for variably changing the length of its respective optical path, another of said optical means comprising a plate having a predetermined thickness.
1 more element
A photographic apparatus comprising:
- an objective lens;
- an optical assembly having an entrance face and a plurality of exit faces, for receiving a light bundle from said objective lens through said entrance face, and for splitting the light bundle into a plurality of individual component light beams and emitting said individual component light beams from said exit faces respectively;
- a plurality of image sensing devices for respectively receiving the individual component light beams from said exit faces and for producing electrical signals therefrom, each sensing device being disposed to cause a distance from a respective exit face of said optical assembly to an image sensing surface of a respective sensing device to not vary;
- and
- optical means arranged in at least one space between one exit face of said optical assembly and the respective image sensing device to vary the length of the optical path between said one exit face and the respective image sensing device according to a signal provided from said objective lens, said optical means including at least one optical element having (a) two movable parallel plates disposed orthogonal to an optical axis of said one exit face, and (b) a flexible, optically transparent substance disposed between said plates and on said optical axis, said two plates being movable to vary the length of said optical path.
2 more elements
Dependencies are inferred from the claim text.