Device for optically scanning and measuring an environment

Patent metadata

Field	Value
Publication number	US-9417316-B2
Application number	US-201013510026-A
Country	US
Kind code	B2
Filing date	Nov 11, 2010
Priority date	Nov 20, 2009
Publication date	Aug 16, 2016
Grant date	Aug 16, 2016

Abstract

In a device for optically scanning and measuring an environment, which device is designed as a laser scanner, with a light emitter, which, by means of a rotary mirror, emits an emission light beam, with a light receiver which receives a reception light beam which is reflected from an object in the environment of the laser scanner, and with a control and evaluation unit which, for a multitude of measuring points, determines at least the distance to the object, the rotary mirror is part of a rotor, which is configured as a hybrid structure.

First claim

The invention claimed is:

1. A laser scanner for optically scanning and measuring an environment, comprising:
a light emitter, a rotary mirror, a light receiver, a motor having a shaft, and a control and evaluation unit, the light emitter emitting an emission light beam, the emission light beam reflected by the rotary mirror to an object in the environment, the object reflecting a portion of the emission light beam to produce a reception light beam, the reception light beam reflected by the rotary mirror through a receiver lens to the light receiver, the receiver lens having an optical axis, the control and evaluation unit determining, for a multitude of measuring points, a distance to the object;
wherein the rotary mirror is coated to reflect the emission light beam and is glued to a rotor with the coating oriented at 45 degrees to the optical axis, the rotor having a central bore that receives the shaft and is rotated about the optical axis by the motor, the rotor further including a holder, the rotor configured as a hybrid structure that includes a plurality of materials, the rotor having a plurality of recesses with material portions in between the plurality of recesses for balancing the rotor.

2. The laser scanner of claim 1 , wherein the holder comprises metal.

3. The laser scanner of claim 1 , wherein the rotor further comprises a housing.

4. The laser scanner of claim 1 , wherein a measuring head is provided, where the measuring head rotates about a vertical axis and bears the light emitter, the light receiver and the rotary mirror, and wherein the rotary mirror rotates about a horizontal axis.

5. The laser scanner of claim 3 , wherein the housing comprises plastic.

Assignees

• Schumann Philipp
• Greiner Alexander
• Faro Tech Inc

Inventors

• Schumann Philipp
• Greiner Alexander

Classifications

• G01S7/481 Primary

  Constructional features, e.g. arrangements of optical elements · CPC title

• G01S17/89

  for mapping or imaging · CPC title