Systems and methods for detecting light

Patent metadata

Field	Value
Publication number	US-9689956-B2
Application number	US-201514643386-A
Country	US
Kind code	B2
Filing date	Mar 10, 2015
Priority date	Mar 10, 2015
Publication date	Jun 27, 2017
Grant date	Jun 27, 2017

Abstract

A light detection system may include a light detecting assembly including a plurality of light detectors. Each light detector may include a substrate, a mirror coupled to the substrate, and a light-receiving tube coupled to the substrate. The light-receiving tube may include a sensor positioned at a first end, a light-transmissive opening at a second end that is opposite from the first end, and a plurality of partitions that are configured to block transmission of light energy. A central light path extends through the light-receiving tube. The system may also include a control unit in communication with the light detecting assembly. The control unit is configured to determine one or more of a direction of light emitted from a light source, a position of the light source, or an intensity of light emitted from the light source based on one or more light detection signals received from the light detecting assembly.

First claim

What is claimed is:

1. A light detecting assembly comprising:
one or more light detectors, wherein each of the one or more light detectors includes:
a substrate;
a mirror coupled to the substrate; and
a light-receiving tube coupled to the substrate, wherein the light-receiving tube includes: (a) a sensor positioned at a first end, (b) a light-transmissive opening at a second end that is opposite from the first end, and (c) a plurality of partitions that are configured to block transmission of light energy, wherein a central light path extends through the light-receiving tube in a manner such that only light energy reflected off the mirror that is substantially aligned with the central light path impinges on the sensor; and

a controller that determines a reflective direction of the source of light energy based on the angle of reflectance of light off the mirror when the light energy impinges on the sensor.

2. The light detecting assembly of claim 1 , wherein the one or more light detectors comprises a plurality of light detectors.

3. The light detecting assembly of claim 1 , wherein the partitions do not extend into the central light path.

4. The light detecting assembly of claim 1 , wherein the mirror is configured to reflect light from a light source into the light-transmissive opening.

5. The light detecting assembly of claim 1 , wherein the mirror is positioned relative to a particular location, wherein the mirror is oriented at a unique angle that is configured to reflect light from a light source that is at the particular location through the central light path and onto the sensor.

6. The light detecting assembly of claim 5 , wherein the light is reflected into at least one of the plurality of partitions when the light source is at a different location other than the particular location.

7. The light detecting assembly of claim 1 , wherein each of the plurality of partitions is configured to prevent light that passes into the light-receiving tube from reflecting out of the light-receiving tube.

8. The light detecting assembly of claim 1 , wherein the mirror is fixed in position relative to the substrate and the light-receiving tube.

9. The light detecting assembly of claim 1 , wherein each of the one or more light detectors further comprises at least one actuator operatively coupled to the mirror, wherein the at least one actuator is configured to move the mirror relative to the substrate and the light-receiving tube.

10. A light detection system, comprising:
a light detecting assembly including a plurality of light detectors, wherein each of the plurality of light detectors comprises:
a substrate;
a mirror coupled to the substrate; and
a light-receiving tube coupled to the substrate, wherein the light-receiving tube includes: (a) a sensor positioned at a first end, (b) a light-transmissive opening at a second end that is opposite from the first end, and (c) a plurality of partitions that are configured to block transmission of light energy, wherein a central light path extends through the light-receiving tube in a manner such that only light energy reflected off the mirror that is substantially aligned with the central light path impinges on the sensor; and

a control unit in communication with the light detecting assembly, wherein the control unit is configured to determine one or more of a direction of light emitted from a light source, a position of the light source, or an intensity of light emitted from the light source based on one or more light detection signals received from the light detecting assembly.

11. The light detection system of claim 10 , wherein the control unit is configured to determine the direction of light energy by receiving the one or more light detection signals from the plurality of light detectors, determining at least one angle of reflectance with respect to the mirror, and determining at least one line of incidence from the at least one angle of reflectance.

12. The light detection system of claim 10 , wherein the control unit is configured to determine the position of the light source by detecting the direction of light from the light source at a first detecting position and a second detecting position that differs from the first position.

13. The light detection system of claim 10 , wherein each mirror of each of the plurality of light detectors is fixed at a unique angular combination with respect to three orthogonal axes.

14. The light detection system of claim 10 , wherein the mirror is positioned relative to a particular location, wherein the mirror is oriented at a unique angle that is configured to reflect light from a light source that is at the particular location onto the sensor through the central light path, and wherein the light is reflected into at least one of the plurality of partitions when the light source is at a different location other than the particular location.

15. The light detection system of claim 10 , wherein each of the plurality of partitions is configured to prevent light that passes into the light-receiving tube from reflecting out of the light-receiving tube.

16. The light detection system of claim 10 , wherein the mirror is fixed in position relative to the substrate and the light-receiving tube.

17. The light detection system of claim 10 , wherein each of the one or more light detectors further comprises at least one actuator operatively coupled to the mirror, wherein the at least one actuator is configure to move the mirror relative to the substrate and the light-receiving tube.

18. The light detection system of claim 10 , wherein at least portions of the substrate and the light-receiving tube are covered with a reflective layer.

19. A light detection system, comprising:
a light detecting assembly including a plurality of light detectors, wherein each of the plurality of light detectors comprises:
a substrate;
a mirror coupled to the substrate, wherein each mirror of each of the plurality of light detectors is fixed at a unique angular combination with respect to three orthogonal axes;
a light-receiving tube coupled to the substrate, wherein the light-receiving tube includes: (a) a sensor positioned at a first end, (b) a light-transmissive opening at a second end that is opposite from the first end, and (c) a plurality of partitions that are configured to block transmission of light energy, wherein a central light path extends through the light-receiving tube in a manner such that only light energy reflected off the mirror that is substantially aligned with the central light path impinges on the sensor, wherein the mirror is positioned relative to a particular location, wherein the mirror is oriented at a unique angle that is configured to reflect light from a light source that is at the particular location onto the sensor through the central light path, and wherein the light is reflected into at least one of the plurality of partitions when the light source is at a different location other than the particular location;
one or more reflective layers covering at least portions of the substrate and the light-receiving tube; and

a control unit in communication with the light detecting assembly, wherein the control unit is configured to determine:
a direction of light emitted from the light source by receiving one or more light detection signals from the light detecting assembly, determining at least one angle of reflectance with respect to the mirror, and determining at least one line of incidence from the at least one angle of reflectance;
a position of the

Assignees

• Boeing Co

Inventors

• Clemen Jr Mark Joseph

Classifications

• G01S3/784

  using a mosaic of detectors · CPC title

• G01S3/782 Primary

  Systems for determining direction or deviation from predetermined direction · CPC title

• G01J1/4257 Primary

  applied to monitoring the characteristics of a beam, e.g. laser beam, headlamp beam (monitoring arrangements for lasers in general H01S3/0014) · CPC title

• G01J1/4228

  arrangements with two or more detectors, e.g. for sensitivity compensation · CPC title

• G01J2001/061

  Baffles · CPC title