Camera having photographing elements for photoelectrically converting optical image into image signals
AssigneeKonica Corporation
InventorsJun Takayama, Yukinori Koizumi
Life of this patent
Estimating the term…
Abstract
A camera is provided with a lens for focusing an optical image of a subject onto an image focusing surface; photographing elements, provided on the image focusing surface, for photoelectrically converting the optical image into image signals, the photographing elements arranged with an arrangement pitch not larger than 7.0 μm; and a diaphragm having a photographing aperture through which the optical image enters into the photographing elements, the diaphragm adjusting the area of the photographing aperture so as to control a light amount of the optical image, wherein when the diaphragm adjusts the photographing aperture so as to have the smallest area, F-number is smaller than 5.6.
Claims10
A camera, comprising:
- a photographing lens for focusing an optical image onto an image forming surface;
- a light amount controlling device comprising a first light amount controlling member for adjusting an area of a photographing aperture so as to control a light amount of the optical image and a second light amount controlling member for controlling a light amount of the optical image regardless of the area of the photographing aperture;
- photographing elements, provided on the image forming surface, for photoelectrically converting the optical image of a subject into image signals, the photographing elements arranged with an arrangement pitch not larger than 7.0 μm;
- and
- a signal processing device for processing the image signals;
- wherein the light amount controlling device starts using the second light amount controlling member when the light amount is further reduced after F-number becomes 5.6 or more by using the first light amount controlling member.
Dependencies are inferred from the claim text.