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. 12, 1982
Filed:
Nov. 28, 1979
Jean-Paul Pellaux, Neuchatel, CH;
Cabloptic S.A., Cortaillod, CH;
Abstract
A provisional holographic lens H.sub.1 is recorded by causing the interference of a parallel reference beam with a divergent beam emitted from an optical fibre 27, and then a definitive holographic lens H.sub.2 is recorded by causing the converging, conjugate beam to the divergent beam to be formed by illuminating the provisional holographic lens by the reference beam and using this converging, conjugate beam to interfere with the beam emitted by an optical fibre 31. The definitive holographic lens H.sub.2 and the ends of the fibres 27 and 31 are embedded in a block of hardenable transparent synthetic material. The provisional holographic lens H.sub.1 may be positioned externally of this block or be enclosed with the other elements in this same block. This process in particularly advantageous, because it permits certain delicate optical adjustments to be eliminated and because it avoids certain causes of light loss.