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. 11, 2006
Filed:
Nov. 10, 2003
Kazumi Yokota, Osaka-fu, JP;
Tomoki Sasayama, Nagaokakyo, JP;
Kazumi Yokota, Osaka-fu, JP;
Tomoki Sasayama, Nagaokakyo, JP;
Shimadzu Corporation, Kyoto, JP;
Abstract
In a spectrophotometer, the following formula is stored in advance as a correction formula of a rotation angle in a correction formula storing portion; θ'=θ+A•sin (C•θ+θa)+B•sin (C•θ+θb)+θc, wherein C, Crepresent coefficients theoretically determined in advance by a structure of a reduction mechanism, and A, B, θa, θb, θc are coefficients specific to the reduction device which are calculated based on measurement results of a plurality of bright line spectrums through fittings by a coefficient determining portion. In case a sample is measured actually, when a desired wavelength is set, a rotation angle correcting portion corrects a rotation angle θ corresponding to the desired wavelength to calculate θ′ by applying the above-stated correction formula, and then, controls a motor so that a diffraction grid is rotated by the angle θ′.