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. 26, 2021
Filed:
Jun. 06, 2016
Shimadzu Corporation, Kyoto, JP;
Hiroyuki Sasai, Kyoto, JP;
Shimadzu Corporation, Kyoto, JP;
Abstract
An irradiation regionof a diffraction gratingincludes a first irradiation region (A) and a second irradiation region (B). In the diffraction grating, a blaze wavelength of a grooveof the first irradiation region (A) is different from a blaze wavelength of a grooveof the second irradiation region (B). That is, the first irradiation region (A) and the second irradiation region (B) have different relationships between a wavelength of light to be spectrally dispersed and a diffraction efficiency. Therefore, in a spectral device, light on a short wavelength side of light reflected by the second irradiation region (B) of the diffraction gratingis not diffracted and is not received by a detector. Then, in a spectral device, aberration on the short wavelength side is corrected. In this way, in the diffraction grating, an aberration can be corrected with a simple structure in which the grooves () are formed such that the blaze wavelengths in the first irradiation region (A) and the second irradiation region (B) are different from each other.