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:
Apr. 29, 2003
Filed:
Jun. 05, 1998
Takashi Hirakawa, Kanagawa, JP;
Atsushi Yamazaki, Kanagawa, JP;
Fuji Photo Film Co., Ltd., Kanagawa, JP;
Abstract
Because the dynamic range of a solid-state image sensor is relatively narrow, it is necessary to reduce the amount of light using an aperture so that the amount of light incident on the solid-state image sensor is within the range of the dynamic range. However, the amount of control at this time may exceed a controllable range which is the maximum limit of an amount in which diffraction is not generated. As a result, the amount of control by the aperture is determined so that the amount of control by the aperture does not exceed the controllable range, and an ND filter, which corresponds to or is approximate to the amount of control of reduced light which was obtained by subtracting the amount of control by the aperture from the total amount of control, is placed on an optical path.