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:
Dec. 06, 2022
Filed:
Mar. 13, 2020
Kazuma Matsuura, Kanagawa, JP;
Yuuta Yoshino, Kanagawa, JP;
Takefumi Takizawa, Kanagawa, JP;
Soichiro Yokota, Kanagawa, JP;
Jun Kishiwada, Kanagawa, JP;
Hiroyoshi Sekiguchi, Kanagawa, JP;
Tadashi Nakamura, Kanagawa, JP;
Kazuma Matsuura, Kanagawa, JP;
Yuuta Yoshino, Kanagawa, JP;
Takefumi Takizawa, Kanagawa, JP;
Soichiro Yokota, Kanagawa, JP;
Jun Kishiwada, Kanagawa, JP;
Hiroyoshi Sekiguchi, Kanagawa, JP;
Tadashi Nakamura, Kanagawa, JP;
Ricoh Company, Ltd., Tokyo, JP;
Abstract
A light signal detection device includes a light receiving optical system configured to receive a reflection signal reflected from an object when irradiation light emitted from an irradiation unit hits the object and reflects from the object; and circuitry configured to binarize the received reflection signal using a first threshold value, based on a determination of whether the reflection signal is equal to or greater than the first threshold value; binarize the received reflection signal using a second threshold value set with a given value similar to a noise signal value, based on a determination of whether the reflection signal is equal to or greater than the second threshold value; and measure a time difference between a time of emitting the irradiation light from the irradiation unit and a time of receiving a reflection signal equal to or greater than the first threshold value or the second threshold value.