Method for optically scanning and measuring an object
First Claim
1. A method for optically scanning and measuring an object by a laser scanner, comprising the steps of:
- modulating an emission light beam with a target frequency;
emitting the emission light beam;
receiving a reception light beam reflected or otherwise scattered from the object in surroundings of the laser scanner, with a measuring clock, as a multiplicity of samples by a light receiver;
determining in each case at least a distance from the laser scanner to the object from phase angles of the multiplicity of samples for a plurality of measuring points by a control and evaluation device; and
correcting a phase shift caused by a distance difference of temporal adjacent samples to correct the determined distances.
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Abstract
In a method for optically scanning and measuring an object by a laser scanner by a procedure in which a emission light beam modulated with a target frequency is emitted by means of a light emitter, a reception light beam reflected or otherwise scattered in some way from an object in the surroundings of the laser scanner is received, with a measuring clock, as a multiplicity of samples by means of a light receiver and in each case at least the distance from the object is determined from the phase angles of the multiplicity of samples for a plurality of measuring points by means of a control and evaluation device, for determining the distances, a phase shift caused by a distance difference of temporal adjacent samples is corrected in order to correct the distances.
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Citations
7 Claims
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1. A method for optically scanning and measuring an object by a laser scanner, comprising the steps of:
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modulating an emission light beam with a target frequency; emitting the emission light beam; receiving a reception light beam reflected or otherwise scattered from the object in surroundings of the laser scanner, with a measuring clock, as a multiplicity of samples by a light receiver; determining in each case at least a distance from the laser scanner to the object from phase angles of the multiplicity of samples for a plurality of measuring points by a control and evaluation device; and correcting a phase shift caused by a distance difference of temporal adjacent samples to correct the determined distances. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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Specification