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:
Mar. 05, 2024
Filed:
Jan. 31, 2020
Nippon Telegraph and Telephone Corporation, Tokyo, JP;
Takuya Kanai, Musashino, JP;
Takeshi Imai, Musashino, JP;
Yumiko Senoo, Musashino, JP;
Kota Asaka, Musashino, JP;
NIPPON TELEGRAPH AND TELEPHONE CORPORATION, Tokyo, JP;
Abstract
A wavelength-selective optical reception device includes a photoreceptor () that converts optical signals () into electric signals and outputs the electric signals, a base () on which the photoreceptor () is provided, a housing () that is mounted on the base () and surrounds the photoreceptor () along with the base (), and that is provided with a window () to pass optical signals () including the optical signals () and including optical signals () of a wavelength different from a first wavelength of the optical signals () and a window () to pass the optical signals (), and an optical filter () that is disposed inside the housing between the window () and the photoreceptor () along the optical axis () of the optical signals (), and that outputs, out of the optical signals () that enter thereto, the optical signals () toward the photoreceptor (), and reflects the optical signals () toward a near side in a direction of travel of the optical signals ().