Windowless microbolometer array

• US 9,851,255 B2
• Filed: 06/11/2015
• Issued: 12/26/2017
• Est. Priority Date: 06/11/2015
• Status: Active Grant

• Current Assignee: Aerospace Corporation
• Original Assignee: Aerospace Corporation
• Inventors: Clemmons, James Hart, Brady, Brian Blaise, Hall, Jeffrey Louis, Curtiss, Thomas Jay
• Primary Examiner(s): Porta, David
• Assistant Examiner(s): Maupin, Hugh H
• Application Number:
  US14/736,828
• Publication Number:
  US 20160363529A1
• Time in Patent Office: 929 Days
• CPC Class Codes: G01J 2005/0077 Imaging
• CPC Class Codes: G01J 5/0014 for sensing the radiation from gases, flames
• CPC Class Codes: G01J 5/08 Optical arrangements
• CPC Class Codes: G01J 5/0804 Shutters
• CPC Class Codes: G01J 5/0831 Masks; Aperture plates; Spatial light modulators
• CPC Class Codes: G01J 5/20 using resistors, thermistors or semiconductors sensitive to radiation, e.g. photoconductive devices
• CPC Class Codes: G01N 9/32 by using flow properties of fluids, e.g. flow through tubes or apertures

Abstract

A windowless microbolometer for use in terrestrial applications and non-terrestrial applications is provided. The windowless microbolometer array may interact with a flow of gas such that a pixel-based image of the gas is generated when the flow of gas impinges upon the windowless microbolometer array. The windowless microbolometer array may also interact with a molecular beam to provide information related to density, shape, and propagation of the molecular beam.

Claims

1. An apparatus, comprising:

a windowless microbolometer array configured to interact with a flow of gas such that a pixel-based image of the gas is generated when the flow of gas impinges upon the windowless microbolometer arrays, wherein the interacting is with bulk of the gas.

2. The apparatus of claim 1, further comprising:

an aperture configured to admit the flow of gas at an angle into a housing.

3. The apparatus of claim 2, wherein the housing surrounds the windowless microbolometer array, and is configured to create a plume of gas that impinges upon the windowless microbolometer array.

4. The apparatus of claim 3, wherein the housing further comprises at least one hole on each side of the windowless microbolometer array, and is configured to allow gas to escape from the housing.

5. The apparatus of claim 1, further comprising:

a computing system configured to receive data from the windowless microbolometer array when the flow of gas impinges upon the windowless microbolometer array.

6. The apparatus of claim 5, wherein the computing system is configured to generate the pixel-based image of the gas to provide information related to density, temperature, and wind vector of the flow of gas.

7. The apparatus of claim 1, wherein the windowless microbolometer array is located in an upper atmosphere to measure density, temperature, and wind vector of the flow of gas.

8. The apparatus of claim 1, further comprising:

a chopper motor comprising at least one aperture configured to allow a flow of gas to flow through the at least one aperture and into an aperture of a housing.

9. The apparatus of claim 1, wherein the windowless microbolometer array is utilized in the upper atmosphere on a moving or stationary vehicle for insitu measurement of the bulk gas.

10. An apparatus, comprising:

an aperture configured to admit a flow of gas into a housing such that bulk of the gas impinges on a windowless microbolometer array; and

a computing system configured to generate a pixel-based image of the bulk gas that provides information related to density, temperature, and wind vector of the bulk gas when the bulk of the gas impinges upon the windowless microbolometer array.

11. The apparatus of claim 10, wherein the housing surrounds the windowless microbolometer array, and is configured to create a plume of gas that impinges on the windowless microbolometer array.

12. The apparatus of claim 10, wherein the housing further comprises at least two vents configured to allow gas to escape the housing.

13. The apparatus of claim 10, wherein the housing further comprises baffles configured to direct a majority of the gas to impinge upon the windowless microbolometer array.

14. The apparatus of claim 10, further comprising:

a chopper wheel comprising at least one aperture configured to allow the flow of gas to pass through the at least one aperture and into the aperture of the housing.

15. The apparatus of claim 14, further comprising:

a motor configured to rotate the chopper wheel such that the flow of gas is allowed to pass through the at least one aperture of the chopper wheel.

16. The apparatus of claim 10, wherein the windowless microbolometer array is utilized in the upper atmosphere on a moving or stationary vehicle for insitu measurement of the bulk gas.

17. An apparatus, comprising:

a windowless microbolometer array configured to interact with a molecular beam to provide information related to density, shape, and propagation of the molecular beam, wherein the interacting is of bulk molecular beam with the windowless microbolometer array.

18. The apparatus of claim 17, further comprising:

a computing system configured to generate a pattern when the molecular beam impinges upon the windowless microbolometer array, wherein

the pattern provides information related to the density, the shape, and the propagation of the molecular beam.

19. The apparatus of claim 17, wherein an amount of energy of the molecular beam deposited into each pixel of the windowless microbolometer array relates to an amount of energy in a gas particle impinging on a particular pixel.

20. The apparatus of claim 17, wherein the windowless microbolometer is located in a terrestrial vacuum or a space vacuum, allowing measurement of the molecular beam to be performed.

21. The apparatus of claim 17, further comprising:

a plurality of motors configured to move the windowless microbolometer array, rotate the windowless microbolometer array, or both, and the windowless microbolometer array allows the molecular beam to impinge on a wider area of, and from a direction on, the windowless microbolometer array.

22. The apparatus of claim 17, further comprising:

a set of apertures configured to be moved into and out of a field of view of the windowless microbolometer array to provide information as to direction, size, and cross-sectional shape of the molecular beam.

23. The apparatus of claim 17, wherein the windowless microbolometer array is within a vacuum chamber for measurement of the molecular beam.