Receiving device for an optical measurement apparatus for capturing objects, light signal redirection device, measurement apparatus and method for operating a receiving device

Patent metadata

Field	Value
Publication number	US-12585000-B2
Application number	US-202017426170-A
Country	US
Kind code	B2
Filing date	Jan 22, 2020
Priority date	Jan 28, 2019
Publication date	Mar 24, 2026
Grant date	Mar 24, 2026

Abstract

The invention relates to a receiving device ( 26 ) for an optical measurement apparatus ( 12 ) for capturing objects ( 18 ) in a monitoring region ( 16 ), to a light signal redirection device ( 40 ), to an optical measurement apparatus ( 12 ) and to a method for operating a receiving device ( 26 ). The receiving device ( 26 ) comprises at least one light signal redirection device ( 40 ) for redirecting light signals ( 32 ) from the monitoring region ( 16 ) to at least one receiver ( 36 ) of the receiving device ( 26 ) and at least one receiver ( 36 ) for receiving and for converting the light signals ( 22 ) into electric signals. The at least one light signal redirection device ( 40 ) has at least one redirection region ( 42 b ), which can act on the light signals ( 22 ) so as to change their direction. Furthermore, the receiving device ( 26 ) comprises at least one drive device ( 50 ) with which the at least one redirection region ( 42 b ) can be set. At least one redirection region ( 42 b ) has at least one diffractive structure.

First claim

The invention claimed is:

1 . A receiving device for an optical measurement apparatus for capturing objects in a monitoring region, the receiving device comprising:
at least one light signal redirection device for redirecting light signals from the monitoring region to at least one receiver of the receiving device, wherein the at least one light signal redirection device has at least one redirection region that can act on the light signals so as to change their direction,
wherein the at least one redirection region is implemented in, at or on at least one substrate that is transmissive to the light signals;
the at least one receiver for receiving and for converting the light signals into electric signals; and at least one drive device with which the at least one redirection region is set, wherein the at least one redirection region has at least one diffractive structure.

2 . The receiving device according to claim 1 , wherein the at least one diffractive structure is configured as a diffractive optical element.

3 . The receiving device according to claim 1 , wherein the at least one redirection region acts to be transmissive to the light signals or to be reflective for the light signals.

4 . The receiving device according to claim 1 , wherein the at least one redirection region is arranged on a light entry side of a substrate or a light exit side of the substrate.

5 . The receiving device according to claim 1 , wherein the at least one light signal redirection device has at least two redirection regions, which are arranged one behind the other with respect to a beam path of the light signals.

6 . The receiving device according to claim 1 , wherein a direction-changing property of the at least one redirection region varies over its extent in at least one direction of extent or the at least one light signal redirection device has at least two redirection regions with different direction-changing properties.

7 . The receiving device according to claim 1 , wherein the at least one redirection region is movable using the at least one drive device.

8 . The receiving device according to claim 1 , wherein the at least one redirection region is arranged so as to be at least one of rotatable, pivotable, or displaceable.

9 . The receiving device according to claim 1 , wherein the at least one receiver has at least one avalanche photodiode, a diode array, or a CCD array.

10 . The receiving device according to claim 1 , wherein the receiving device has at least one optical system, which is arranged between the at least one receiver and the at least one redirection region.

11 . A light signal redirection device for a receiving device of an optical measurement apparatus for capturing objects in a monitoring region, the light signal redirection device comprising: at least one redirection region that acts on light signals from the monitoring region so as to change their direction, wherein the at least one redirection region has at least one diffractive structure and is implemented in, at or on at least one substrate that is transmissive to the light signals.

12 . An optical measurement apparatus for capturing objects in a monitoring region, comprising:
at least one transmission device for transmitting light signals into the monitoring region; at least one receiving device with which the light signals that have been reflected at the objects that may be present in the monitoring region is received; and at least one control and evaluation device with which the at least one transmission device and the at least one receiving device is controlled and with which the light signals received can be evaluated, wherein the at least one receiving device comprises: at least one light signal redirection device for redirecting the light signals from the monitoring region to at least one receiver of the at least one receiving device, wherein the at least one light signal redirection device has at least one redirection region that acts on the light signals so as to change their direction,
wherein the at least one redirection region is implemented in, at or on at least one substrate that is transmissive to the light signals,
the at least one receiver for receiving and for converting the light signals into electric signals, and at least one drive device with which the at least one redirection region is set, wherein the at least one redirection region of the at least one receiving device has at least one diffractive structure.

13 . A method for operating a receiving device of an optical measurement apparatus for capturing objects in a monitoring region, the method comprising:
transmitting light signals from the monitoring region onto at least one redirection region of at least one light signal redirection device, wherein the at least one redirection region is implemented in, at or on at least one substrate that is transmissive to the light signals; changing a direction of the light signals with the at least one redirection region in dependence on an incidence of the light signals; and directing the light signals to at least one receiver of the receiving device, wherein the at least one redirection region is set using at least one drive device, and wherein the direction of the light signals is set with the aid of at least one diffractive structure.

14 . The method according to claim 13 , wherein the at least one redirection region is moved to set the at least one redirection region.

Assignees

• Valeo Schalter & Sensoren Gmbh

Inventors

• Schuler Thomas
• Nguyen Ho Hoai Duc
• Hovorka Petr
• MüLLER FELIX
• Hartmann Werner
• Shroff Spandan

Classifications

• G02B26/10

  Scanning systems · CPC title

• G02B26/0808

  by means of one or more diffracting elements · CPC title

• G01S17/08

  for measuring distance only (indirect measurement G01S17/46; active triangulation systems G01S17/48) · CPC title

• G01S7/4817

  relating to scanning · CPC title

• G01S17/931

  of land vehicles · CPC title