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:
Feb. 23, 2010
Filed:
Nov. 01, 2006
Tatsuhiko Hagiwara, Asaka, JP;
Naoyuki Nishikawa, Minami-Ashigara, JP;
Yoshihiro Ito, Asaka, JP;
Tetsuya Okumura, Saitama, JP;
Tatsuhiko Hagiwara, Asaka, JP;
Naoyuki Nishikawa, Minami-Ashigara, JP;
Yoshihiro Ito, Asaka, JP;
Tetsuya Okumura, Saitama, JP;
FUJIFILM Corporation, Tokyo, JP;
FUJINON Corporation, Saitama, JP;
Abstract
The image taking apparatus of the invention includes a light quantity control device that is arranged on the optical axis of subject light and controls transmitted volume of the subject light. The light quantity control device includes a light quantity control layer and a pair of light-transmissive electrodes. The light quantity control layer expands and contracts in accordance with an electric field generated therein and thereby changes the transmitted volume of the subject light. The electrodes are disposed so as to sandwich the light quantity control layer and generate an electric field in the light quantity control layer, in response to application of voltage, thereby causing the light quantity control layer to expand and contract.