Precision optical mount for optical devices

Patent metadata

Field	Value
Publication number	US-9500836-B2
Application number	US-201414337034-A
Country	US
Kind code	B2
Filing date	Jul 21, 2014
Priority date	Jul 21, 2014
Publication date	Nov 22, 2016
Grant date	Nov 22, 2016

Abstract

An optical mount and mounting system including an optical device, a housing, and a plurality of optical mounts that couple the optical device to the optical housing. Each mount includes a sleeve attached to the optical device and each sleeve includes a bore. Studs are attached to the optical housing and each stud includes an outer bonding surface extending through the bore of each sleeve. Once the optical device is aligned properly, a curable material is deposited into the sleeve and cured between the sleeve and the stud, such that the curable material couples the sleeve and the stud to each other to provide a robust structural joint that minimizes self-induced stresses into the optic. A series of annular conical portions and corresponding surfaces are provided to retain registration of the optical device against dynamic shearing and bending forces. A method of aligning and mounting an optical device is provided.

First claim

What is claimed is:

1. An optical device mount, comprising:
a sleeve having a bore defining an inner bonding surface and having an outer portion attached to an optical device;
a stud at least partially extending through the bore of the sleeve and having an outer bonding surface whereby a volume of space is defined between the sleeve and the outer bonding surface, the stud having an opening and a plurality of passageways in fluid communication with the opening and with the volume of space, the stud having an optical housing interface that mates to an optical housing; and
a curable material deposited via the opening and disposed throughout the passageways and the volume of space.

2. The optical device mount of claim 1 , wherein the curable material is an epoxy and wherein the sleeve and the stud are not in direct contact with each other such that the optical device and optical housing are only coupled by the curable material, thereby minimizing or eliminating shear or bending forces exertable on the optical device.

3. The optical device mount of claim 1 , wherein the sleeve and the stud are comprised of the same type of metal such that thermal expansion properties of the sleeve and the stud are the same or substantially similar.

4. The optical device mount of claim 1 , wherein the outer portion of the sleeve includes a conical portion that mates against a corresponding conical surface of the optical device.

5. The optical device mount of claim 4 , wherein the conical portion comprises a conical angle between about 82 and 120 degrees.

6. The optical device mount of claim 4 , wherein the conical portion comprises a conical angle of 100 degrees.

7. The optical device mount of claim 1 , wherein the stud includes a conical portion that mates against a corresponding conical surface of the optical housing.

8. The optical device mount of claim 1 , wherein the opening is formed through a distal end of the stud and the plurality of passageways include four passageways formed through the outer bonding surface.

9. The optical device mount of claim 1 , further comprising a fastener attached to the proximal end of the stud and fastening the stud to the optical housing, wherein the optical housing interface of the stud includes a conical portion and the fastener includes a conical portion, wherein the conical portions mate to respective conical surfaces of the optical housing.

10. The optical device mount of claim 1 , further comprising a retaining collar and a washer, the retaining collar positioned around the sleeve to attach the sleeve to the optical device, and the washer positioned adjacent the sleeve and between the sleeve and the optical housing to prevent the curable material from contacting the optical housing.

11. A mount system for alignment and mounting of an optical device, the mount system comprising:
an optical device;
a housing;
a plurality of mounts coupling the optical device to the housing, each mount including:
a sleeve extending through a mounting hole of the optical device and attached to the optical device, the sleeve having a bore defining an inner bonding surface;
a stud attached to the optical housing and having an outer bonding surface at least partially extending through the bore of the sleeve, whereby a volume of space is defined between the outer bonding surface of the stud and the inner bonding surface of the sleeve, the stud having an opening and a plurality of passageways in fluid communication with the opening and with the volume of space; and
a curable material deposited via the opening and disposed throughout the passageways and the volume of space.

12. The system of claim 11 , wherein the curable material is an epoxy and wherein the sleeve and the stud of each mount are not in direct contact with each other such that the optical device and optical housing are only coupled by the curable material, thereby minimizing or eliminating shear or bending forces exertable on the optical device.

13. The system of claim 11 , wherein the sleeve and the stud are comprised of the same type of metal as the optical device such that thermal expansion properties of the sleeve, stud, and optical device are the same or substantially similar.

14. The system of claim 11 , wherein the sleeve of each mount includes a conical portion that mate against a corresponding conical surface of the optical device, and wherein the stud includes a conical portion that mates against a corresponding conical surface of the optical housing.

15. The system of claim 11 , wherein the plurality of passageways of each stud include four passageways formed around the outer bonding surface.

16. The system of claim 11 , wherein, before the curable material is cured in the volume of space, the optical device is movable in six degrees of freedom relative to the optical housing about the plurality of mounts, such that the optical device may be precisely aligned relative to another optical device before bonded to the optical housing by the curable material.

17. A method of aligning and mounting an optical device, the method comprising:
attaching a stud to an optical housing, the stud having an outer bonding surface extending from the optical housing, the stud having an opening and a plurality of passageways in fluid communication with the opening;
attaching a sleeve to the optical device, the sleeve having a bore defining an inner bonding surface, whereby a volume of space is defined between the outer bonding surface and the inner bonding surface, wherein the passageways are in fluid communication with the volume of space;
positioning the outer bonding surface of the stud through the bore of the sleeve;
aligning the optical device to a desired position; and
depositing a curable material into the passageways and the volume of space via the opening.

18. The method of claim 17 , wherein aligning the optical device to the desired position includes moving the optical device according to the position of a primary optical device or an alignment tool, whereby the optical device is movable in six degrees of freedom before the curable material is cured.

19. The method of claim 17 , further comprising allowing the curable material to cure, wherein the curable material is an epoxy, thereby fastening the optical housing to the optical device only by the curable material, such that shear or bending forces between the optical housing and the optical device are minimized or eliminated.

20. The method of claim 17 , further comprising performing the steps of claim 17 in two more instances such that at least three sets of studs and sleeves couple the optical device to the optical housing via only the curable material, whereby the studs, the sleeves, and the optical device are comprised of the same type of material having the same or substantially similar thermal expansion properties.

21. The method of claim 17 , wherein the attaching the sleeve includes fastening the sleeve to the optical devices with a retaining collar, the retaining collar having a conical portion that mates against a corresponding conical surface of the optical device, and wherein the sleeve includes a conical portion that mates against an opposing corresponding conical surface of the optical device.

22. The method of claim 17 , further comprising:
allowing the curable material to cure;
removing the sleeve from the stud by breaking the bond of the curable material;
removing the stud from the optical housing and removing the sleeve from the optical

Assignees

• Raytheon Co

Inventors

• Marr Lyale F
• Hartnett Douglas J
• White Randy W
• Scott Richard L

Classifications

• F16B5/025

  specially designed to compensate for misalignement or to eliminate unwanted play · CPC title

• B32B2551/00

  Optical elements · CPC title

• F16B11/008

  of tubular elements or rods in coaxial engagement · CPC title

• G02B7/003 Primary

  Alignment of optical elements (G02B7/001, G02B7/002 take precedence; for mirrors G02B7/1822) · CPC title

• B32B37/18

  involving the assembly of discrete sheets or panels only · CPC title