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:
Apr. 26, 2005
Filed:
Sep. 03, 2003
Yasuyuki Suzuki, Musashino, JP;
Yoshihiro Sanpei, Musashino, JP;
Makoto Komiyama, Musashino, JP;
Kenji Ogino, Musashino, JP;
Raiju Okada, Musashino, JP;
Shuuhei Okada, Musashino, JP;
Shin Kamei, Musashino, JP;
Yasuyuki Suzuki, Musashino, JP;
Yoshihiro Sanpei, Musashino, JP;
Makoto Komiyama, Musashino, JP;
Kenji Ogino, Musashino, JP;
Raiju Okada, Musashino, JP;
Shuuhei Okada, Musashino, JP;
Shin Kamei, Musashino, JP;
Yokogawa Electric Corporation, Tokyo, JP;
Abstract
The present invention relates to a spectrometer whereby the accuracy of wavelength measurement can be improved without being affected by the environment of use. The present invention is characterized by improvements made to a spectrometer for spectrally dividing the light under measurement by transmitting the components thereof at different, wavelength-by-wavelength angles, and receiving and detecting the light under measurement thus spectrally divided by the chromatic dispersion device using an optical detector. The apparatus according to the present invention comprises a refractive index compensation means for compensating changes in the angle at which the chromatic dispersion device transmits the light under measurement, according to changes in the refractive index of the medium in which the chromatic dispersion device is placed.