Laser Systems and Methods Having Auto-Ranging and Control Capability

• US 20090219961A1
• Filed: 02/28/2008
• Published: 09/03/2009
• Est. Priority Date: 02/28/2008
• Status: Abandoned Application

• Current Assignee: BE Meyers & Co Incorporated
• Original Assignee: BE Meyers & Co Incorporated
• Inventors: Shannon, David C., Meyers, Brad E., Straka, Scott
• Application Number:
  US12/039,715
• Publication Number:
  US 20090219961A1
• Time in Patent Office: Days
• US Class Current: 372/29.10
• CPC Class Codes: G01S 17/50 Systems of measurement based on relative movement of target
• CPC Class Codes: G01S 7/497 Means for monitoring or calibrating

Abstract

Laser systems and methods having an ability to automatically adjust a laser output based on one or more of a state of an object detected within a field of view and a motion of the laser system are disclosed.

Claims

1. An apparatus, comprising:

a laser system configured to emit a beam;

a state determination component configured to analyze a field of view at least one of coincident with and substantially encompassing the beam and to determine at least an object distance between the laser system and an object within the field of view; and

a control system configured to receive target state information from the state determination component, and to determine whether a maximum permissible exposure has been exceeded, and to controllably adjust one or more operating conditions of the laser system based on the determination.

2. The apparatus of claim 1 wherein the state determination component is configured to determine the object distance based on a portion of the beam that is reflected from the object to the state determination component.

3. The apparatus of claim 1 wherein the state determination component is configured to transmit a ranging signal toward the object and to determine the object distance based on a portion of the ranging signal that is reflected from the object to the state determination component.

4. The apparatus of claim 1 wherein the beam comprises a series of laser pulses, and wherein the state determination component is configured to determine the object distance based on a reflected portion of at least some of the series of laser pulses.

5. The apparatus of claim 1 wherein the laser system is configured to emit a beam having a standoff distance, and wherein the control system is configured to determine whether the maximum permissible exposure has been exceeded based on a comparison of the object distance with the standoff distance.

6. The apparatus of claim 5 wherein the control system is further configured to controllably adjust one or more operating conditions of the laser system to adjust the standoff distance to ensure a favorable comparison between the object distance and the standoff distance.

7. The apparatus of claim 6 wherein the standoff distance is based on a nominal ocular hazard distance, and wherein the object distance compares favorably with the standoff distance when the object distance exceeds the standoff distance.

8. The apparatus of claim 1 wherein the laser system includes a laser source that generates a laser light, and a beam directing assembly that conditions the laser light into the beam.

9. The apparatus of claim 8 wherein the control system is configured to controllably adjust one or more of the laser source and the beam directing assembly.

10. The apparatus of claim 1 wherein the state determination component includes at least one signal conditioner that conditions incoming ranging signals, a detector that senses incoming ranging signals, an automatic gain control component that conditions an output from the detector, and a processor that determines the object distance based on the output of the automatic gain control component.

11. The apparatus of claim 1 wherein the state determination component is configured to determine the object distance based on one or more of a time of flight method, a triangulation method, and a modulation method.

12. The apparatus of claim 1 wherein the laser system includes a laser motion determination component that provides laser motion information to the control system, and wherein the control system is configured to determine whether a maximum permissible exposure has been exceeded based on the laser motion information and the target state information.

13. The apparatus of claim 12 wherein the laser motion information includes laser rotational information, and wherein the target state information further includes target translational motion information.

14. A method, comprising:

providing a laser beam;

determining a state of an object within a field of view at least one of coincident with and substantially encompassing the laser beam;

determining whether a maximum permissible exposure of the object has been exceeded; and

if the maximum permissible exposure has been exceeded, automatically adjusting one or more operating conditions of the laser beam.

15. The method of claim 14 wherein determining a state of an object includes determining an object distance based on a portion of the laser beam that is reflected from an object.

16. The method of claim 14 wherein determining a state of an object includes transmitting a ranging signal toward the object, and determining the object distance based on a portion of the ranging signal that is reflected from the object.

17. The method of claim 14 wherein providing a laser beam includes providing a series of laser pulses, and wherein determining a state of an object distance includes determining an object distance based on a reflected portion of at least some of the series of laser pulses.

18. The method of claim 14 wherein providing a laser beam includes providing a laser beam having an intensity configured to at least one of dazzle, warn, and disrupt a distal observer.

19. The method of claim 14 wherein automatically adjusting one or more operating conditions of the laser beam includes automatically adjusting one or more of a laser output power, an intensity, an attenuation, and a divergence angle of the laser beam.

20. The method of claim 14 wherein the laser beam has a standoff distance, and wherein determining whether a maximum permissible exposure of the object has been exceeded includes comparing the state of the object with the standoff distance.

21. The method of claim 20 wherein the state of the object includes an object distance and the standoff distance is based on a nominal ocular hazard distance, and wherein the object distance compares favorably with the standoff distance when the object distance exceeds the standoff distance.

22. The method of claim 14 wherein determining a state of an object includes determining an object distance based on one or more of a time of flight method, a triangulation method, and a modulation method.

23. The method of claim 14, wherein determining a state of an object includes determining at least one an object distance, a translational motion, and a rotational motion of the object.

24. The method of claim 14, further comprising determining a motion of the laser system, and wherein determining whether a maximum permissible exposure of the object has been exceeded includes determining whether a maximum permissible exposure of the object has been exceeded based on the motion of the laser system and the state of the object.

25. The method of claim 14, wherein determining a state of an object includes determining a range and a translational motion of the object, the method further comprising determining a rotational motion of the laser system, and wherein determining whether a maximum permissible exposure of the object has been exceeded includes determining whether a maximum permissible exposure of the object has been exceeded based on the rotational motion of the laser system and the range and translational motion of the object.

26. An assembly, comprising:

a laser system configured to emit a laser beam;

at least one of a laser motion determination component configured to determine a laser motion information, and a target state determination component configured to determine a target state information of at least one object within a field of view; and

a control system configured to receive at least one of the laser motion information and the target state information, and to determine an exposure level of the object to the laser beam, and to controllably adjust one or more operating conditions of the laser system based on the determination.

27. The assembly of claim 26 wherein the at least one of the laser motion determination component and the target state determination component includes both the laser motion determination component and the target state determination component.

28. The assembly of claim 27 wherein the laser motion information includes one or more of a laser translational motion and a laser rotational motion, and wherein the target state information includes one or more of a target distance, a target translational motion, and a target rotational motion.

29. The assembly of claim 27 wherein the laser motion information includes a laser rotational motion, and wherein the target state information includes a target distance and a target translational motion.

30. The assembly of claim 26 wherein the control system is configured to controllably adjust one or more operating conditions to prevent a maximum permissible exposure from being exceeded.