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1. WO2020205014 - DIRECT MOUNTING OF FILTERS OR OTHER OPTICAL COMPONENTS TO OPTICAL DETECTORS USING FLEXURES

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[ EN ]

WHAT IS CLAIMED IS:

1. An apparatus comprising:

an optical detector configured to detect at least a portion of incoming radiation;

an optical component configured to provide at least the portion of the incoming radiation to the optical detector; and

at least one flexure that mounts the optical component to the optical detector, each flexure configured to deform in response to expansion or contraction of at least one of the optical component and the optical detector.

2. The apparatus of Claim 1, wherein each flexure is further configured to transfer heat from the optical component to the optical detector.

3. The apparatus of Claim 1, wherein:

the apparatus comprises multiple flexures; and

different flexures are coupled to different sides of the optical detector and to different sides of the optical component.

4. The apparatus of Claim 1, wherein each flexure comprises:

a side surface that is flexible in a first dimension and rigid in second and third dimensions, the dimensions being orthogonal to each other; and

arms projecting from the side surface, the arms configured to contact the optical component and the optical detector.

5. The apparatus of Claim 1, wherein each flexure comprises a side surface that is flexible in a first dimension and rigid in second and third dimensions, the dimensions being orthogonal to each other, the side surface projecting inward to form shelves configured to contact the optical component and the optical detector.

6. The apparatus of Claim 1, wherein each flexure comprises at least one notch in an outer face of the flexure.

7. The apparatus of Claim 6, wherein each flexure comprises a conductive material partially or completely filling the at least one notch.

8. The apparatus of Claim 1, wherein:

the apparatus comprises multiple optical components; and

the at least one flexure mounts the multiple optical components to the optical detector.

9. The apparatus of Claim 1, wherein:

the apparatus comprises multiple flexures, at least two of the flexures having different designs; and

the multiple flexures mount the optical component to the optical detector such that the optical component has a specified tip or tilt relative to the optical detector.

10. The apparatus of Claim 1, wherein the optical component comprises at least one of: a filter, a lens, a polarizer, an aperture, and a cover.

11. A system comprising:

an optical detector configured to detect at least a portion of incoming radiation;

an optical component configured to provide at least the portion of the incoming radiation to the optical detector;

at least one flexure that mounts the optical component to the optical detector, each flexure configured to deform in response to expansion or contraction of at least one of the optical component and the optical detector;

a cold shield positioned around the optical detector and the optical component, the cold shield comprising an aperture through which the incoming radiation passes;

a platform on which the cold shield is mounted; and

a cold finger contacting the platform, the cold finger configured to be cooled in order to remove heat from the platform and thereby cool the optical detector, the optical component, and the cold shield.

12. The system of Claim 11, further comprising:

a read-out integrated circuit electrically coupled to the optical detector, the read-out integrated circuit mounted on the platform.

13. The system of Claim 11, wherein the cold shield further comprises baffles configured to block stray radiation from striking the optical detector.

14. The system of Claim 11, wherein each flexure comprises:

a side surface that is flexible in a first dimension and rigid in second and third dimensions, the dimensions being orthogonal to each other; and

arms projecting from the side surface, the arms configured to contact the optical component and the optical detector.

15. The system of Claim 11, wherein each flexure comprises a side surface that is flexible in a first dimension and rigid in second and third dimensions, the dimensions being orthogonal to each other, the side surface projecting inward to form shelves configured to contact the optical component and the optical detector.

16. The system of Claim 11, wherein:

the system comprises multiple optical components; and

the at least one flexure mounts the multiple optical components to the optical detector.

17. The system of Claim 11, wherein:

the system comprises multiple flexures, at least two of the flexures having different designs; and the multiple flexures mount the optical component to the optical detector such that the optical component has a specified tip or tilt relative to the optical detector.

18. A method comprising :

mounting an optical component to an optical detector using at least one flexure, the optical detector configured to detect at least a portion of incoming radiation, the optical component configured to provide at least the portion of the incoming radiation to the optical detector;

wherein each flexure is configured to deform in response to expansion or contraction of at least one of the optical component and the optical detector.

19. The method of Claim 18, wherein each flexure is configured to deform in order to accommodate differences in coefficients of thermal expansion of the optical component and the optical detector.

20. The method of Claim 18, wherein each flexure comprises a side surface that is flexible in a first dimension and rigid in second and third dimensions, the dimensions being orthogonal to each other.