The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 29, 1997
Filed:
Sep. 05, 1995
Nikon Corporation, Tokyo, JP;
Abstract
The invention has the object of obtaining an image output of the appropriate size, even in cases in which the saturation level changes when the amplifier gain is switched, so that high precision focus detection can be carried out continually. The image sensor system includes an image sensor that outputs an image signal according to the light intensity distribution of the subject image that has been composed by the optical system; an amplifier that amplifies the image signal from the image sensor; an amplification ratio switching capability that changes the amplification ratio of the amplification means to a prescribed amplification ratio; an accumulation time interval calculator that calculates the accumulation time interval of the image sensor based on the target value of the image sensor output that has been selected according to the amplification ratio and the amplified image output; and an image sensor controller that controls the operation of the image sensor based on the accumulation time interval that is calculated by the accumulation time interval calculator.