Optics assembly for high power laser tools

• US 9,360,631 B2
• Filed: 02/23/2012
• Issued: 06/07/2016
• Est. Priority Date: 08/20/2008
• Status: Active Grant

• Current Assignee: Foro Energy, Inc.
• Original Assignee: Foro Energy, Inc.
• Inventors: Fraze, Jason D., Faircloth, Brian O., Zediker, Mark S.
• Primary Examiner(s): Blevins, Jerry
• Application Number:
  US13/403,509
• Publication Number:
  US 20120275159A1
• Time in Patent Office: 1,566 Days
• Field of Search: 385/93, 362/259, 362/317
• US Class Current: 1/1
• CPC Class Codes: G02B 26/0875 by means of one or more refracting elements
• CPC Class Codes: G02B 6/32 having lens focusing means positioned between opposed fibre ends with lens being an integral part of the single fibre end G02B6/262
• CPC Class Codes: G02B 6/3624 Fibre head, e.g. fibre probe termination optical details of light guide terminations G02B6/241; reshaping of light guides G02B6/2552; optical details of coupling light into or out of fibre end G02B6/262
• CPC Class Codes: G02B 6/4296 coupling with sources of high radiant energy, e.g. high power lasers, high temperature light sources

Abstract

There is provided a high power laser rotational optical assembly for use with, or in high power laser tools for performing high power laser operations. In particular, the optical assembly finds applications in performing high power laser operations on, and in, remote and difficult to access locations. The optical assembly has rotational seals and bearing configurations to avoid contamination of the laser beam path and optics.

Claims

1. A high power laser optics assembly comprising:

a. a first section and a second section;

b. the first section having a first opening for receiving a high power laser source for providing a high power laser beam;

c. the second section having a second opening for transmitting the high power laser beam;

d. the first opening and the second opening being in optical communication and defining an optical channel; and

,

e. a means for sealingly placing the first opening and the second opening in rotational association.

2. The high power optical assembly of claim 1, wherein the assembly is capable of maintaining optical alignment, as measured by tip/tilt to less than about 0.0066 radians.

3. The high power optics assembly of claim 2, wherein the optical alignment is maintained over temperature ranges from about −

100°

C. to about 200°

C.

4. The high power optics assembly of claim 3, wherein the optical alignment is maintained over forces of about 100 g'"'"'s.

5. The high power optics assembly of claim 4, wherein the optical alignment is maintained over forces of about 200 g'"'"'s.

6. The high power optics assembly of claim 2, wherein the optical alignment is maintained over forces of about 100 g'"'"'s.

7. The high power optics assembly of claim 2, wherein the optical alignment is maintained in the presence of transmitting at least about a 5 kW laser beam between the first and second openings.

8. The high power optics assembly of claim 2, wherein the optical alignment is maintained in the presence of transmitting at least about a 10 kW laser beam between the first and second openings.

9. The high power optics assembly of claim 2, wherein the optical alignment is maintained in the presence of transmitting at least about a 50 kW laser beam between the first and second openings.

10. The high power optics assembly of claim 9, comprising a means for managing back reflections.

11. The high power optics assembly of claim 2, wherein the optical channel extends through the rotational sealing means, and the rotational sealing means comprises a bearing assembly and a rotary seal.

12. The high power optics assembly of claim 2, comprising a means for passive cooling.

13. The high power optics assembly of claim 2, comprising a means for managing back reflections.

14. The high power optics assembly of claim 1, wherein the assembly is capable of maintaining optical alignment, as measured by tip/tilt to less than about 0.004 radians.

15. The high power optics assembly of claim 14, wherein the optical alignment is maintained in the presence of transmitting at least about a 5 kW laser beam between the first and second openings.

16. The high power optics assembly of claim 15, wherein the optical channel extends through rotational sealing means, and the rotational sealing means comprises a bearing assembly and a rotary seal.

17. The high power optics assembly of claim 16, comprising a means for passive cooling.

18. The high power optics assembly of claim 16, comprising a means for managing back reflections.

19. The high power optics assembly of claim 14, wherein the optical alignment is maintained in the presence of transmitting at least about a 10 kW laser beam between the first and second openings.

20. The high power optics assembly of claim 14, wherein the optical alignment is maintained in the presence of transmitting at least about a 50 kW laser beam between the first and second openings.

21. The high power optics assembly of claim 14, wherein the optical channel extends through the rotational sealing means, and the rotational sealing means comprises a bearing assembly and a rotary seal.

22. The high power optics assembly of claim 21, comprising a means for passive cooling.

23. The high power optics assembly of claim 21, comprising a means for managing back reflections.

24. The high power optics assembly of claim 14, comprising a means for managing back reflections.

25. The high power optics assembly of claim 1, wherein the assembly is capable of maintaining optical alignment, as measured by tip/tilt to less than 0.018 radians.

26. The high power optics assembly of claim 25, wherein the optical alignment is maintained in the presence of transmitting at least about a 5 kW laser beam between the first and second openings.

27. The high power optics assembly of claim 25, wherein the optical channel extends through rotational sealing means, and the rotational sealing means comprises a bearing assembly and a rotary seal.

28. The high power optics assembly of claim 27, wherein the rotational sealing means comprises two bearing assemblies.

29. The high power optics assembly of claim 25, comprising a meat for managing back reflections.

30. The high power optics assembly of claim 1, wherein the assembly is capable of maintaining optical alignment, as measured by tip/tilt to less than 0.001 radians.

31. The high power optics assembly of claim 30, wherein the optical alignment is maintained in the presence of transmitting at least about a 5 kW laser beam between the first and second openings.

32. The high power optics assembly of claim 30, wherein the optical alignment is maintained in the presence of transmitting at least about a 10 kW laser beam between the first and second openings.

33. The high power optics assembly of claim 30, wherein the optical alignment is maintained in the presence of transmitting at least about a 50 kW laser beam between the first and second openings.

34. The high power optics assembly of claim 30, wherein the optical channel extends through rotational sealing means, and the rotational sealing means comprises a bearing assembly and a rotary seal.

35. The high power optics assembly of claim 30, comprising a means for managing back reflections.

36. The high power optics assembly of claim 1, wherein the assembly is capable of maintaining optical alignment, as measured by tip/tilt to less than 0.0005 radians.

37. The high power optics assembly of claim 1, wherein the optical channel extends through the rotational sealing means, and the rotational sealing means comprises a bearing assembly and a rotary seal.

38. The high power optics assembly of claim 1, wherein the rotational sealing means comprises two bearing assemblies.

39. The high power optics assembly of claim 1, wherein the rotational sealing means comprises three bearing assemblies.

40. The high power optics assembly of claim 1, comprising a means for passive cooling.

41. The high power optics assembly of claim 40, comprising a means for managing back reflections.

42. The high power optics assembly of claim 1, comprising a means for managing back reflections.

43. The high power optics assembly of claim 1, wherein the assembly is capable of maintaining optical alignment, as measured by tip/tilt to less than about 0.004 radians over basic operating parameters.

44. The high power optical assembly of claim 1, wherein the assembly is capable of maintaining optical alignment, as measured by tip/tilt to less than about 0.001 radians over basic operating parameters.

45. The high power optical assembly of claim 1, wherein the assembly is capable of maintaining optical alignment, as measured by defocus to less than about 0.05 mm over basic operating parameters.

46. The high power optical assembly of claim 1, wherein the assembly is capable of maintaining optical alignment, as measured by decentering to less than about 1.6 mm over basic operating parameters.

47. The high power optical assembly of claim 1, wherein the assembly is capable of maintaining optical alignment, as measured by decentering to less than about 1 mm over basic operating parameters.