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:
Jun. 18, 2013
Filed:
Jan. 26, 2010
Masanori Kobayashi, Kanagawa, JP;
Hideaki Hirai, Kanagawa, JP;
Shin Aoki, Kanagawa, JP;
Shigeru Oouchida, Tokyo, JP;
Masanori Kobayashi, Kanagawa, JP;
Hideaki Hirai, Kanagawa, JP;
Shin Aoki, Kanagawa, JP;
Shigeru Oouchida, Tokyo, JP;
Ricoh Company, Ltd., Tokyo, JP;
Abstract
Disclosed is a liquid droplet recognition apparatus for detecting liquid droplets attached to a front surface of a transparent member. The apparatus includes an image pickup apparatus that picks up a vertically polarized light image and a horizontally polarized light image at the front surface of the transparent member from a side of a rear surface of the transparent member; and a signal processing unit that determines whether the liquid droplets are attached to the front surface of the transparent member based on a polarized-light image ratio composed of the vertically polarized light image and the horizontally polarized light image picked up by the image pickup apparatus.