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:
Feb. 05, 2002
Filed:
May. 06, 1999
Douglas Charles John Reid, Hillmorton, Rugby, Warwickshire CV22 8QJ, GB;
David James Robbins, Abthorpe, Towcester, Northamptonshire, NN12 8QU, GB;
Gert Jaak Anna Sarlet, B-8000 Brugge, BE;
Other;
Abstract
A multi-wavelength optical reflector comprises a diffraction grating structure ( ) which comprises a plurality of repeat grating units ( ) in which each grating unit ( ) comprises a series of adjacent diffraction gratings ( ) having the same pitch. The grating units ( ) and adjacent gratings within a grating unit are separated by a phase change ( ) of substantially pi (&pgr; radians). The lengths of the gratings ( ), which are different for each grating within a grating unit, are selected so as to provide a predetermined comb reflection spectrum which comprises a plurality of reflection maxima of substantially equal reflectivity.