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:
Aug. 08, 2000
Filed:
Oct. 21, 1997
David E Budil, Stoughton, MA (US);
Keith A Earle, Ithaca, NY (US);
Jack H Freed, Ithaca, NY (US);
James R Anderson, Chicago, IL (US);
Northeastern University, Boston, MA (US);
Abstract
A variable-coupling quasioptical electron paramagnetic resonance apparatus. In one embodiment, the variable-coupling quasioptical electron paramagnetic resonance apparatus includes a variable coupling quasioptical resonance cavity constructed from two back-to-back Fabry-Perot interferometers. One Fabry-Perot interferometer is formed from two partially reflecting mirrors. The second Fabry-Perot interferometer is an interferometer formed from one of the partially reflecting mirrors and a back mirror. A sample to be studied is placed within the cavity adjacent the partially reflecting mirrors and between one of the partially reflecting mirrors and the back mirror. The relative spacing of the partially reflecting mirrors and the back mirror is adjustable. With this arrangement, the interferometer can be made to act as a single mirror with variable reflectivity, thereby permitting incident radiation reaching the sample to be varied precisely and continuously.