Assembly of components having different coefficients of thermal expansion

Patent metadata

Field	Value
Publication number	US-11040514-B2
Application number	US-201715601424-A
Country	US
Kind code	B2
Filing date	May 22, 2017
Priority date	Jul 10, 2013
Publication date	Jun 22, 2021
Grant date	Jun 22, 2021

Abstract

A component assembly includes a first component, such as an optical component, and a second component, such as a support component, having different coefficients of thermal expansion (CTEs). The component assembly also includes a spacer having a CTE matched to that of the first component, disposed between the first component and the second component. When the CTE of the first component is greater than that of the second component, the second component includes a protrusion, and the spacer includes a complementary opening for receiving the protrusion, such that a joint between the protrusion and the complementary opening is under compressive stress. The spacer also includes a mounting area for receiving the first component, and an air gap disposed between the first component and the protrusion.

First claim

I claim:

1. An assembly comprising:
a first component having a first coefficient of thermal expansion (CTE);
a second component having a second CTE different from the first CTE; and
a spacer, disposed between the first component and the second component, having a third CTE substantially matched to the first CTE and different from the second CTE, the spacer including:
a body having opposing upper and lower surfaces disposed at opposing axial ends of the body;
a mounting area disposed on the upper surface of the body for receiving the first component, wherein the mounting area and a lower surface of the first component are joined via a first adhesive; and
a protrusion axially extending from the lower surface of the body into a complementary opening in an upper surface of the second component such that a joint between the protrusion and the complementary opening is under compressive stress, wherein the protrusion and the complementary opening are joined via a second adhesive;
wherein the spacer defines an air gap disposed within the body between the upper surface of the body and the lower surface of the body to provide thermal isolation between the first component and the second component, and
wherein the air gap comprises a slit which extends laterally through the body above the protrusion transverse to an axis of the body, and which is spaced from the upper and lower surfaces of the body.

2. The assembly of claim 1 , wherein the first CTE and the third CTE are less than the second CTE.

3. The assembly of claim 1 , wherein lateral surfaces of the protrusion and the complementary opening are joined by the second adhesive.

4. The assembly of claim 1 , wherein the mounting area is disposed over the protrusion.

5. The assembly of claim 1 , wherein the mounting area is disposed over the air gap.

6. The assembly of claim 1 , wherein the first component and the spacer are joined by an adhesive.

7. The assembly of claim 6 , wherein the adhesive forms a planar joint that extends laterally beyond the air gap and the protrusion.

8. The assembly of claim 1 , wherein the first component and the second component extend laterally beyond the spacer.

9. An assembly of components having different coefficients of thermal expansion (CTEs), the assembly comprising:
a first component;
a second component; and
a spacer, disposed between the first component and the second component, having a CTE substantially matched to a CTE of the first component, the spacer including:
a body having opposing upper and lower surfaces disposed at opposing axial ends of the body;
a mounting area disposed on the upper surface of the body for receiving the first component, wherein the mounting area and a lower surface of the first component are joined via a first adhesive; and
a protrusion axially extending from the lower surface of the body into a complementary opening in an upper surface of the second component such that a joint between the protrusion and the complementary opening is under compressive stress wherein the protrusion and the complementary opening are joined via a second adhesive;
wherein the spacer defines an air gap disposed within the body between the upper surface of the body and the lower surface of the body to provide thermal isolation between the first component and the second component, and
wherein the air gap comprises a slit which extends laterally through the body above the protrusion transverse to an axis of the body, and which is spaced from the upper and lower surfaces of the body.

10. The assembly of claim 9 , wherein
the first component has a first CTE,
the second component has a second CTE different from the first CTE,
the spacer has a third CTE different from the second CTE, and
the first CTE and the third CTE are less than the second CTE.

11. The assembly of claim 9 , wherein lateral surfaces of the protrusion and the complementary opening are joined by the second adhesive.

12. The assembly of claim 9 , wherein the mounting area is disposed over the protrusion.

13. The assembly of claim 9 , wherein the mounting area is disposed over the air gap.

14. The assembly of claim 9 , wherein the first component and the spacer are joined by an adhesive.

15. The assembly of claim 14 , wherein the adhesive forms a planar joint that extends laterally beyond the air gap and the protrusion.

16. The assembly of claim 9 , wherein the first component and the second component extend laterally beyond the spacer.

Assignees

• Lumentum Operations Llc

Inventors

• Moidu Abdul Jaleel K

Classifications

• B32B7/027 Primary

  Thermal properties · CPC title

• G02B7/008

  with means for compensating for changes in temperature or for controlling the temperature; thermal stabilisation · CPC title

• Y10T403/217

  Members having different coefficients of expansion · CPC title

• G02B7/028

  with means for compensating for changes in temperature or for controlling the temperature; thermal stabilisation · CPC title

• G02B7/181

  with means for compensating for changes in temperature or for controlling the temperature; thermal stabilisation · CPC title