Optical projector with beam monitor including sensing intensity of beam pattern not projected toward an object

US8829406B2 · kind B2 · utility

Assignee

• Primesense Ltd · IL

Inventors

• Ronen Akerman · Holon, IL
• Dudu Voschina · Hod HaSharon, IL
• Niv Galezer · Nes Ziona, IL
• Yoed Arieli · Shfaram, IL
• Tomer Segev · Nes Ziona, IL
• Zafrir Mor · Ein HaBsor, IL
• Alexander Shpunt · Nes Ziona, IL

Key dates

• Filing date: Jul 8, 2013
• Grant date: Sep 9, 2014
• Expiry date: Jul 8, 2033

Classification

• Technology area (CPC H): Electricity
• CPC primary: H10F77/50
• WIPO field: Optics
• WIPO sector: Instruments

Abstract

Optical apparatus includes a device package, with a radiation source contained in the package and configured to emit a beam of coherent radiation. A diffractive optical element (DOE) is mounted in the package so as to receive and diffract the radiation from the radiation source into a predefined pattern comprising multiple diffraction orders. An optical detector is positioned in the package so as to receive and sense an intensity of a selected diffraction order of the DOE.