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:
Dec. 22, 1992
Filed:
Aug. 28, 1991
Eugene F Young, Wilton, CT (US);
The Perkin-Elmer Corporation, Norwalk, CT (US);
Abstract
A double beam detector system for liquid chromatography includes a light source and slits to effect two beams of radiation symmetrical to an optical axis and focused through a common point. A concave reflective dispersion grating is disposed on the optical axis which is folded at the grating. A collimating lens directs the beams parallel to the optical axis into a pair of detector cells. The collimating lens and entrance lenses for the cells are selected so that the common point is imaged on exit windows of the cells. The grating has a curvature selected cooperatively with the collimating lens, entrance lenses and relevant distances so as to focus the entrance slits at respective entrance windows for the cells. The beam size is constricted to less than the cell bore size by selected parameters of the collimating lens and the entrance lenses.