Patent · US Active

Laser projector with two laser diodes

US11936161B2 · kind B2 · utility

0Cited by

0References

10Claims

0Family size

Assignee

LAP GmbH Laser Applikationen · DE

Inventors

Hans Peter Werner · Giengen an der Brenz, DE
Matthias Lange · Dalldorf, DE
Tze Keong Chow · Singapore, SG

Key dates

Filing date	Jun 25, 2021
Grant date	Mar 19, 2024
Priority date	—
Expiry date	Oct 8, 2042

Classification

Technology area (CPC H)Electricity
CPC primaryH04N9/3164
WIPO fieldAudio-visual technology
WIPO sectorElectrical engineering

Abstract

A device for laser projection comprises a first laser diode configured to emit a first linearly polarized laser beam extending along a first polarization axis and a second laser diode configured to emit a second linearly polarized laser beam extending along a second polarization axis that is perpendicular to the first polarization axis. A polarization combiner is configured to combine the first and second linearly polarizing laser beams into a combined laser beam, wherein the combined laser beam comprises one of: (1) circular polarization; and (2) elliptical polarization. A measuring device is configured to measure an intensity of the combined laser beam. A control unit is configured to receive the measured intensity of the combined laser beam and is further configured to adjust an intensity of at least one of: (1) the first laser diode; and (2) the second laser diode.

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