Device for symmetrizing the radiation emitted by linear optical transmitters

US6680800B1 · kind B1 · utility

Assignee

• unique-m.o.d.e. AG · DE

Inventors

• Peter Schreiber · Jena, DE
• Thilo Von Freyhold · Jena, DE

Key dates

• Filing date: Jan 30, 2001
• Grant date: Jan 20, 2004
• Expiry date: Nov 11, 2021

Classification

• Technology area (CPC H): Electricity
• CPC primary: H01S5/4025
• WIPO field: Optics
• WIPO sector: Instruments

Abstract

A device is proposed to symmetrize the radiation from one or from several linear optical emitters. The device possesses per emitter 1, 1a, 1b a cylindrical lens optical unit 2, 2a, 2b with one or more cylindrical lenses, which collimate each light beam in the y-direction, where by rotating at least one of the cylindrical lenses around the z-axis or by providing a discontinuous diffracting element, each light beam is diffracted at a different diffraction angle in the y-direction. The device additionally contains a director-collimator optical unit 3, which collimates each light beam in the x-direction and diffracts at different diffraction angles so that the main beams of the individual light beams in the x-direction converge at a specified distance from the emitter and run parallel in the y-direction. Finally, the device has a redirecting optical unit 4 which compensates for the diffraction of the light beam in the x-direction caused by the director-collimator optical unit 3.