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:
Oct. 03, 2000
Filed:
Dec. 08, 1998
Mitsuo Kitaoka, Kyoto, JP;
Shimadzu Corporation, Kyoto, JP;
Abstract
An ultraviolet and visible light absorbance detector uses a flow cell having a sample cell opening and a reference opening formed therethrough extending parallel to each other. The reference opening has a cross-sectional shape which is elongated in a direction perpendicular to the direction of its extension. An optical system causes an image of a slit to be formed with dispersed light over an area which includes light-receiving windows of both these openings, and portions of the dispersed light, after passing through these openings, are individually detected by light-receiving elements of a light-receiving device. Since the reference opening has an increased sectional area and its light throughput is increased, the absorbance noise due to the reference opening is reduced and the overall S/N ratio of the detector is improved.