US 12,590,796 B2Granted

Device and method for determining dimensional data relating to an object

AssigneeSikora AG

InventorsKolja Tobias Schuh, Hilmar Bolte

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Abstract

A method for determining dimensional data of an object includes emitting terahertz radiation by a first transmitter onto a surface of the object. The terahertz radiation emitted by the first transmitter is received by a first receiver after the terahertz radiation has passed through the object. Terahertz radiation comprising a bandwidth of less than 5% of a carrier frequency of the terahertz radiation is emitted by a second transmitter onto at least one location on the surface of the object. The terahertz radiation emitted by the second transmitter is received by a second receiver after the terahertz radiation has passed through the object. A dimension of the object is determined from one of: (i) the terahertz radiation received by the second transmitter; and (ii) a temporal or spatial change of the terahertz radiation received by the second receiver in consideration of that received by the first receiver.

Claims23

Dependent claims

A method for determining dimensional data relating to an object, comprising:

emitting terahertz radiation by a first transmitter onto at least one location on a surface of the object at a point in time;
receiving the terahertz radiation emitted by the first transmitter by a first receiver after the terahertz radiation has passed through the object at least once;
emitting terahertz radiation comprising a bandwidth of less than 5% of a carrier frequency of the terahertz radiation by a second transmitter onto at least one location on the surface of the object at multiple points in time;
receiving the terahertz radiation emitted by the second transmitter by a second receiver after the terahertz radiation has passed through the object at least once;
determining a dimension of the object from one of:
(i) the terahertz radiation received by the second transmitter;
(ii) a temporal change of the terahertz radiation received by the second receiver in consideration of the terahertz radiation received by the first receiver;
and (iii) a spatial change of the terahertz radiation received by the second receiver in consideration of the terahertz radiation received by the first receiver,
wherein the bandwidth of the terahertz radiation emitted by the first transmitter is more than 10% of the carrier frequency of the terahertz radiation.

6 more elements

A device for determining dimensional data relating to an object, comprising:

a first transmitter configured to emit terahertz radiation onto at least one location on a surface of the object at least one point in time;
a first receiver configured to receive the terahertz radiation emitted by the first transmitter after the terahertz radiation has passed through the object at least once;
a second transmitter configured to emit terahertz radiation having a bandwidth of less than 5% of a carrier frequency of the terahertz radiation onto at least one of:
(i) the surface of the object at multiple points in time;
and multiple locations on the surface of the object;
a second receiver configured to receive the terahertz radiation emitted by the second transmitter after the terahertz radiation has passed through the object at least once;
and
an evaluation apparatus configured to determine a dimension of the object from at least one of:
(i) the terahertz radiation received by the second transmitter;
(ii) a temporal change of the terahertz radiation received by the second receiver in consideration of the terahertz radiation received by the first receiver;
and (iii) a spatial change of the terahertz radiation received by the second receiver in consideration of the terahertz radiation received by the first receiver,
wherein the bandwidth of the terahertz radiation emitted by the first transmitter is more than 10% of the carrier frequency of the terahertz radiation.

9 more elements

Dependencies are inferred from the claim text.

Facts

Application: 18/118,877Filed 8 Mar 2023
Priority: DE 10 2022 105 479.99 Mar 2022
Published: US 2023/0288187 A114 Sep 2023
Granted: 31 Mar 2026
Term ends: Not estimatedThe source records don’t support an estimate.

Classification6 codes

G01B 11/02
Measuring arrangements characterised by the use of optical techniques: for measuring length, width or thickness
G01B 11/06
For measuring length, width or thickness: for measuring thickness ; e.g. of sheet material
G01B 11/08
Measuring arrangements characterised by the use of optical techniques: for measuring diameters
G01N 21/88
Systems specially adapted for particular applications: investigating the presence of flaws or contamination