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:
Oct. 21, 2025
Filed:
Jan. 06, 2021
Naoki Nakamura, Saitama, JP;
Masahiro Itoh, Kanagawa, JP;
Yoshifumi Sudoh, Kanagawa, JP;
Susumu Momma, Kanagawa, JP;
Shun Okazaki, Kanagawa, JP;
Shigenobu Hirano, Kanagawa, JP;
Yasuo Katano, Kanagawa, JP;
Kenji Kameyama, Kanagawa, JP;
Norikazu Igarashi, Kanagawa, JP;
Aino Hasegawa, Kanagawa, JP;
Naoki Nakamura, Saitama, JP;
Masahiro Itoh, Kanagawa, JP;
Yoshifumi Sudoh, Kanagawa, JP;
Susumu Momma, Kanagawa, JP;
Shun Okazaki, Kanagawa, JP;
Shigenobu Hirano, Kanagawa, JP;
Yasuo Katano, Kanagawa, JP;
Kenji Kameyama, Kanagawa, JP;
Norikazu Igarashi, Kanagawa, JP;
Aino Hasegawa, Kanagawa, JP;
RICOH COMPANY, LTD., Tokyo, JP;
Abstract
A light guide includes light guiding members including first and second light guiding members, an optical entrance having a plane on which the light is incident, a light guiding unit to guide the light incident on the optical entrance with repeated reflection, a light beam ejection unit to eject the light to an outside of the light guide, and an extraction unit to reflect the light guided by the light guiding unit toward the light beam ejection unit. The light guiding members guide and eject a light, and the second light guiding member is bonded to, at least, the light guiding unit of the first light guiding member.