Tilt-in-place alignment system and method

• US 6,905,259 B2
• Filed: 12/31/2001
• Issued: 06/14/2005
• Est. Priority Date: 12/31/2001
• Status: Active Grant

• Current Assignee: Texas Instruments, Inc.
• Original Assignee: Texas Instruments, Inc.
• Inventors: Powell, Donald A., Smith, Steven E.
• Primary Examiner(s): Abrams, Neil
• Application Number:
  US10/035,903
• Publication Number:
  US 20030123808A1
• Time in Patent Office: 1,261 Days
• Field of Search: 385/52, 385/136, 385/137, 385/138, 385/25, 385/80, 385/81, 385/90, 385/91, 439/8, 403/122, 403/143, 403/144, 403/149, 403/141, 403/90, 362/421, 248/181.1
• US Class Current: 385/90
• CPC Class Codes: G02B 27/62 Optical apparatus specially adapted for adjusting optical elements during the assembly of optical systems
• 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 6/3897 Connectors fixed to housings, casing, frames or circuit boards G02B6/44528 takes precedence
• CPC Class Codes: G02B 6/4226 Positioning means for moving the elements into alignment, e.g. alignment screws, deformation of the mount
• CPC Class Codes: G02B 6/4237 Welding
• CPC Class Codes: G02B 7/003 Alignment of optical elements G02B7/001, G02B7/002 take precedence; for mirrors G02B7/1822
• CPC Class Codes: Y10T 403/32803 Separable socket sections

Abstract

Disclosed is a mounting system and method in which symmetrical springs are used about a collar in a gimbal system to capture an assembly of a ball and an optical or other type of component. Once captured within the mounting system, the ball/component assembly can pivot until an optimal alignment is reached. Once the optimal alignment is reached, the ball/component assembly is fixed using laser welding.

Claims

1. A component mounting system comprising:

a) a ball to be fixed to a component to be aligned, the ball and component together forming a ball-and-component assembly;

b) a socket into which the ball is placed; and

c) a collar to be mounted to the socket, whereby the socket and collar capture the ball between them, the collar having springs welded to the ball.

2. The component mounting system of claim 1 wherein the socket comprises raised features about the socket'"'"'s interior.

3. The component mounting system of claim 2 wherein the raised features are ball bearings mounted into the socket.

4. The component mounting system of claim 2 wherein the raised features are raised surfaces of the socket.

5. The component mounting system of claim 2 wherein the raised features are symmetrically located about the socket.

6. The component mounting system of claim 5 wherein the raised features are stainless steel.

7. The component mounting system of claim 5 wherein the raised features are brass.

8. The component mounting system of claim 5 wherein the raised features are tetrafluoroethylene.

9. The component mounting system of claim 1 wherein the component to be mounted is an optical component.

10. The component mounting system of claim 1 wherein the socket has a circular opening into which the ball-and-component assembly is placed.

11. The component mounting system of claim 1 wherein the socket, collar, and ball are formed of the same material.

12. The component mounting system of claim 1 wherein the socket, collar, and ball are formed of stainless steel.

13. The component mounting system of claim 1 wherein the component to be mounted is selected from the group consisting of collimators, lasers, lenses, and spatial light modulators.

14. The component mounting system of claim 1 wherein the springs are shaped like fins which protrude from the collar.

15. A component mounting system comprising:

a) a ball to be fixed to a component to be aligned, the ball and component together forming a ball-and-component assembly;

b) a socket into which the ball may be placed, the socket comprising ball bearings about the socket'"'"'s interior in contact with the ball; and

c) a collar to be mounted to the socket, the collar also having an opening therein, whereby the socket and collar capture the ball, the collar also having springs that are located about the opening wherein the springs are adapted to make contact with the ball.

16. The component mounting system of claim 15 wherein the springs are shaped like fins which protrude from the collar.

17. The component mounting system of claim 15 wherein the springs are welded to the ball.

18. The component mounting system of claim 15 wherein the socket comprises stainless steel raised features in contact with the ball.

19. The component mounting system of claim 15 wherein the socket comprises brass raised features in contact with the ball.

20. The component mounting system of claim 15 wherein the socket comprises tetrafluoroethylene raised features in contact with the ball.

21. The component mounting system of claim 15 wherein the socket, collar, and ball are formed of stainless steel.

22. The component mounting system of claim 15 wherein the component to be mounted is selected from the group consisting of collimators, lasers, lenses, and spatial light modulators.

23. A method for aligning an optical component, the method comprising:

a) affixing the optical component to a ball;

b) placing the ball into a socket;

c) fastening a collar having an opening to the socket, capturing the ball within the collar/socket assembly, the collar having at least three springs that are mechanically biased symmetrically around and against the ball;

d) pivoting the ball into position; and

e) affixing the springs to the ball, thereby fixing the pivotal alignment of the ball relative to the collar/socket assembly.

24. The method of claim 23 wherein a beam of light exits from the optical component in a direction fixed by the pivotal alignment of the optical component and further comprising:

a) placing an optical sensor at a spot terminating a path from the optical component;

b) measuring the intensity of the optical signal received at the optical sensor;

c) continuing the pivoting of the ball-and-component assembly until the intensity of the received optical signal is generally at a maximum.

25. The method of claim 24 wherein the affixing of the springs to the ball is accomplished by welding.

26. The method of claim 25 wherein the welding is laser welding.