Back to results
US 6,052,540 AGranted
Viewfinder device for displaying photographic information relating to operation of a camera
AssigneeCanon Kabushiki Kaisha
InventorTakeshi Koyama
Life of this patent
Estimating the term…
Abstract
A viewfinder device includes an objective lens, a hologram disposed in a place other than a prescribed image plane of the objective lens and a plane conjugate to the prescribed image plane, and an illumination device for illuminating the hologram. The position of a virtual image formed by the hologram is arranged to coincide with the prescribed image plane or the plane conjugate to the prescribed image plane, so that displays can be made in an adequate state within the visual field of a viewfinder.
Claims12
A viewfinder device comprising:
- objective lens means for forming a real image on a prescribed image plane;
- a hologram disposed in a place other than said prescribed image plane or a conjugate plane of said prescribed image plane;
- an eyepiece for sighting said real image formed by said objective lens means, and
- illumination means for illuminating said hologram to project an image of said hologram directly toward said eyepiece.
1 more element
A viewfinder device comprising:
- a hologram;
- a plurality of illumination means for illuminating said hologram by illumination operations, wherein said plurality of illumination means respectively produce light having visually distinguishable wavelengths;
- and
- eyepiece lens means for directly viewing a reproduced image of said hologram illuminated by said plurality of illumination means.
1 more element
A camera comprising:
- variation means for changing a phototaking state of the camera from a normal phototaking state to a panorama phototaking state,
- viewfinder means for viewing a viewfinder field corresponding to a normal phototaking image plane area, the viewfinder field of the camera remaining substantially unchanged when said variation means changes the phototaking state between the normal phototaking state and the panorama phototaking state, and
- indication means for indicating to an operator that the camera is in the panorama phototaking state by superposing a panorama mark within the viewfinder field in response to a change from the normal phototaking state to the panorama phototaking state by said variation means, such that said indication means does not influence a viewfinder image in an area other than the panorama mark in the viewfinder field.
Dependencies are inferred from the claim text.