Polarization detector and method for fabricating the polarization detector

US6806956B2 · kind B2 · utility

Assignee

• OSRAM Opto Semiconductors GmbH · DE

Inventors

• Werner Spath · Holzkirchen, DE
• Ulrich Steegmüller · Regensburg, DE

Key dates

• Filing date: May 21, 2002
• Grant date: Oct 19, 2004
• Expiry date: Apr 10, 2023

Classification

• Technology area (CPC G): Physics
• CPC primary: G01J4/00
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

A polarization detector is described which contains a beam splitter, which disperses an incident light beam into partial beam paths. The partial beams pass though &lgr;/4 wafers and a cholesterol layer and impinge upon detectors. The polarization direction of the incident light beam can be measured by the polarization detector with the aid of the signal level of the detectors.