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:
Jun. 12, 1984
Filed:
Feb. 08, 1982
Applicant:
Inventor:
Wolfgang Witte, Uberlingen, DE;
Assignee:
Bodenseewerk Perkin-Elmer & Co., GmbH, Uberlingen, DE;
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
G01J / ;
U.S. Cl.
CPC ...
356333 ;
Abstract
A pre-monochromator having a grating monochromator includes an unsymmetrically ruled concave diffraction grating, by means of which a light source is directly imaged upon an exit slit. The diffraction grating is unsymmetrical with respect to the distribution of the grating constants such that the image distance remains substantially constant during the rotation of the diffraction grating.