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:
May. 18, 2010
Filed:
Jan. 29, 2007
Akishige Kodama, Tokyo, JP;
Shigeo Kobayashi, Kanagawa, JP;
Akishige Kodama, Tokyo, JP;
Shigeo Kobayashi, Kanagawa, JP;
Ricoh Company, Limited, Tokyo, JP;
Abstract
A lens barrel includes a communicating passage that communicates between a space inside the lens barrel and outside of the lens barrel. The communicating passage includes a through hole, a circumferential groove, and a vertical groove. Light from outside the lens barrel is prevented from entering an effective optical range of a lens through the communicating passage. A partition is arranged between the effective optical range and a non-light-transmitting range. A surface of a portion outside the effective optical range is formed of a light-absorbing material, so that light is prevented from directly entering the lens through the communicating passage.