Optical polarizer having a prism

US4556292A · kind A · utility

Assignee

• Siemens Aktiengesellschaft · DE

Inventors

• Konrad Mathyssek · Zorneding, DE
• Hans Mahlein · Unterhaching, DE

Key dates

• Filing date: Feb 7, 1983
• Grant date: Dec 3, 1985
• Expiry date: Feb 7, 2003

Classification

• Technology area (CPC G): Physics
• CPC primary: G02B5/3066
• WIPO field: Optics
• WIPO sector: Instruments

Abstract

An optical polarizer for an optical isolator has a dove prism having a selected geometric shape such that both the incident and emerging beams satisfy the Brewster condition at the respective entrance and exit faces. A further embodiment of the invention consists of the combination of two dove prisms with an intervening multiple layer. The polarizer can be easily adjusted with no reduction in the coupling efficiency with incoming light, can be manufactured inexpensively, and exhibits no parallel offset or astigmatism.