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:
Jan. 23, 2018
Filed:
Feb. 04, 2016
Shimadzu Corporation, Kyoto-shi, Kyoto, JP;
Yusuke Nagai, Kyoto, JP;
Keisuke Ogawa, Kyoto, JP;
Masato Watanabe, Kyoto, JP;
Kumiko Jingu, Kyoto, JP;
Masanori Fujiwara, Kyoto, JP;
Tomoyuki Yamazaki, Kyoto, JP;
SHIMADZU CORPORATION, Kyoto-shi, Kyoto, JP;
Abstract
Provided is an optical analyzer for performing a feedback control on the amount of light emitted from an LED as a light source, in which the configuration of an optical system is made simple and the degree of freedom in optical system arrangement is secured. An optical memberfor focusing most of light while discharging part of the light as unfocused light is provided on an optical path from a light casting unitto a sample cell. The optical membercan be achieved with a simple configuration, for example, two ball lenses spaced apart by a predetermined distance from each other. The light focused by the optical memberis cast as measurement light into the sample cell. Meanwhile, a second photodetectoris arranged at a position where the unfocused light reaches. The second photodetectorgenerates a detection signal in accordance with the amount of light that has entered the second photodetectoras monitored light, and a drive current to be supplied to an LED is controlled through a drive current controlling unitand a current sourcesuch that the amount of light is maintained at a fixed level.