Scanning apparatus

US7697120B2 · kind B2 · utility

Assignee

• RIEGL LASER MEASUREMENT SYSTEMS GMBH · AT

Inventors

• Rainer Reichert · Horn, AT
• Andreas Ullrich · Eßlingen, DE
• Martin Pfennigbauer · Tulln, AT
• Johannes Riegl · Trabenreith, AT

Key dates

• Filing date: Nov 27, 2006
• Grant date: Apr 13, 2010
• Expiry date: Aug 11, 2028

Classification

• Technology area (CPC G): Physics
• CPC primary: G01S17/10
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

A scanning apparatus for use in a scanning optical system comprises a laser transmitter to produce a transmitter beam. This transmitter beam is deviated by a beam scanner, e.g. a tiltable mirror, to produce a pattern of a scanning beam. There are bearings which define first and second axes of rotation perpendicular to each other and intersecting each other in an intersecting point for allowing the beam scanner to scan. In front of the beam scanner is a window of transparent material in the shape of a spherical cap so as to define a central axis and a central point. The central axis intersects the intersecting point of the two other axes, and this common intersecting point coincides preferably with the central point of the sphere of the window.