Image pickup system
AssigneeOlympus Corporation
InventorsYuji Miyauchi, Hirohiko Kimata
Life of this patent
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Abstract
The invention relates to an image pickup system comprising an electronic view finder suitable for achieving compactness and having a sufficient viewing angle of field and satisfactory optical performance. The image pickup system comprises an image pickup device, an image display device for displaying an image, a controller for converting image formation obtained from the image pickup device into a signal that enables the image information to be formed on the image display device, and a viewing optical system for guiding an image displayed on the display device to a viewer's eye. The viewing optical system comprises at least three lenses.
Claims8
An image pickup system comprising an image pickup device, an image display device for displaying an image, a controller for converting image information obtained from said image pickup device into a signal that enables said image information to be formed on said image display device, an a viewing optical system for guiding an image displayed on said display device to a viewer's eye, wherein:
- said image display device has a display screen with a diagonal length in the range of 2.5 mm to 8 mm, and
- said viewing optical system comprises a plurality of lens components in which lens surfaces in contact with air all have a convex surface directed toward an air side, and
- an angle of field, 2ω, in a diagonal direction of an observation image observed by said viewing optical system is at least 22.01°.
An image pickup system comprising an image pickup device, an image display device for displaying an image, a controller for converting image information obtained from said image pickup device into a signal that enables said image information to be formed on said image display device, and a viewing optical system for guiding an image displayed on said display device to a viewer's eye, wherein:
- said image display device has a display screen with a diagonal length in the range of 2.5 mm to 8 mm, and
- said viewing optical system comprises a plurality of lens components in which all surfaces thereof, in contact with air, are convex on an air side, said viewing optical system comprises at least three lens elements, and wherein the following conditions (1) and (3) are satisfied:
- 1.0<b/a (1)
- 1.4<fe/a<2.4 (3)
- where a is a distance from the display screen of said image display device to the surface, nearest to the image display device side, of said viewing optical system, b is a total length from the surface, axially nearest to the image display device side, of said viewing optical system to the surface thereof nearest to the viewer side, and fe is a focal length of said viewing optical system.
Dependencies are inferred from the claim text.