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. 06, 1976
Filed:
Jul. 19, 1974
Guy Pieuchard, Fontenay-le-Fleury, FR;
Jean Flamand, Chatenay-Malabry, FR;
Genevieve Passereau, Bourg-la-Reine, FR;
Jobin-Yvon, Longjumeau, FR;
Abstract
Monochromator comprising a concave grating, the lines of which are situated at the intersection of the concave surface with a family of surfaces geometrically like the equiphasic surfaces obtained as loci of the luminous intensity maxima produced by the interference of two beams from two point sources C and D, an entry slit A and an exit slit B, wherein the polar coordinates of the points C and D and of the entry slit A and exit slit B in a system of polar coordinates having as its origin the apex of the grating and as reference axis the axis of the grating in a plane of reference passing through this axis are connected by the following relationships: ##EQU1## in which (.alpha., l.sub.A), (.beta., l .sub.B), (.beta., l.sub.C) and (.delta., l.sub.D) are the polar coordinates of A,B,C and D, respectively, R is the radius of curvature of the grating, .omega.=(.alpha.+.beta.) /2 and .phi.=(.alpha.-.beta.)/2.