Patent · US Expired

Optical rotary data transmission device with active termination

US7149382B2 · kind B2 · utility

2Cited by

8References

32Claims

0Family size

Assignee

SCHLEIFRING UND APPARATEBAU GMBH · DE

Inventors

Harry Schilling · Eichstätt, DE
Matthias Rank · Fürstenau, DE
Maren Isert · Birkenfeld, DE

Key dates

Filing date	Apr 7, 2005
Grant date	Dec 12, 2006
Priority date	—
Expiry date	Apr 16, 2025

Classification

Technology area (CPC G)Physics
CPC primaryG02B6/266
WIPO fieldOptics
WIPO sectorInstruments

Abstract

A device for transmitting modulated optical signals between units comprises a first unit and a second unit, the first unit being supported to be rotatable with respect to the second unit, a light guide along a circular track on the first unit, a first and a second light coupler for coupling light signals into or out of the light guide, the second light coupler being disposed on the second unit and movable with respect to the light guide. For an achievement of a high transmission bandwidth, a controllable absorber is provided in the light guide to prevent a propagation of light along a plurality of paths between the two units. In a method for operating the device, the absorber is controlled so that modulated light signals from the first and the second directions have a same amplitude at a point at which the modulated light signals have the same phase.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.