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:
Oct. 26, 1999
Filed:
May. 08, 1998
Michael Geraint Robinson, Stadhampton, GB;
Nicholas Mayhew, Oxford, GB;
Duncan James Anderson, Abingdon, GB;
Craig Tombling, Stadhampton, GB;
Michael John Towler, Botley, GB;
Harry Garth Walton, Cowley, GB;
Martin David Tillin, Abingdon, GB;
Sharp Kabushiki Kaisha, Osaka, JP;
Abstract
A polarization independent optical phase modulator comprises first and second substrates. A reflector is disposed between the first and second substrates and a quarterwave plate is disposed between the reflector and the first substrate. A polarization dependent electrooptic layer is disposed between the quarterwave plate and the first substrate. The quarterwave plate has an optic axis which is aligned at 45 degrees to the polarization whose phase is modulated by the electrooptic layer.