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:
Sep. 30, 1980
Filed:
Mar. 19, 1979
Gilbert Boisde, Bures-sur-Yvette, FR;
Alain Boissier, Marly le Roi, FR;
Commissariat a l'Energie Atomique, Paris, FR;
Abstract
Photometric cell of the type comprising two juxtaposed spherical half-mirrors M.sub.1 and M.sub.2 and a third spherical mirror M facing mirrors M.sub.1 and M.sub.2, the three mirrors having the same radius of curvature, while mirrors M.sub.1 and M.sub.2 have their centers of curvature C.sub.1 and C.sub.2 located on mirror M and slightly displaced with respect to one another and mirror M has its center of curvature C between the two mirrors M.sub.1 and M.sub.2, optical means being provided for introducing a measuring light beam into the cell through an entrance diaphragm E and for extracting it therefrom after multiple reflections on said mirrors through an exit diaphragm S, wherein the mirror M is truncated perpendicular to a line joining the centers C.sub.1 and C.sub.2, the truncated portion of the mirror being replaced by an optical system L operating by transmission, the entrance diaphragm E and exit diaphragm S being positioned level with said optical system L on a line perpendicular to lines C.sub.1 -C.sub.2, and wherein it also comprises a third half-mirror M.sub.3, the optical system L being such that the half-mirrors M.sub.1 and M.sub.2 are conjugate to one another, while the third half-mirror M.sub.3 has a center of curvature C.sub.3 located on the line joining the two diaphragms E and S conjugate to one another by the mirrors and the optical system L.