Spatially-selective disks, submillimeter imaging devices, methods of submillimeter imaging, profiling scanners, spectrometry devices, and methods of spectrometry

• US 8,780,345 B2
• Filed: 04/23/2012
• Issued: 07/15/2014
• Est. Priority Date: 04/22/2011
• Status: Expired due to Fees

• Current Assignee: University of Memphis Research Foundation
• Original Assignee: University of Memphis Research Foundation
• Inventors: Furxhi, Orges, Jacobs, Eddie L.
• Primary Examiner(s): Geisel, Kara E
• Application Number:
  US13/454,012
• Publication Number:
  US 20130021613A1
• Time in Patent Office: 813 Days
• Field of Search: 356/326, 356 72- 73, 356/310
• US Class Current: 356/310
• CPC Class Codes: G01J 3/0229 using masks, aperture plates, spatial light modulators or spatial filters, e.g. reflective filters
• CPC Class Codes: G01J 3/2803 using photoelectric array detector
• CPC Class Codes: G01J 3/2846 using modulation grid; Grid spectrometers
• CPC Class Codes: G02B 2207/129 Coded aperture imaging
• CPC Class Codes: G02B 26/10 Scanning systems
• CPC Class Codes: H01Q 15/0053 Selective devices used as spatial filter or angular sidelobe filter

Abstract

One aspect of the invention provides a spatially-selective disk including a plurality of holes arranged such that a matrix having a plurality of rows, each row having elements corresponding to a fraction of a pixel in a viewing window projected onto the disk that is backed by a hole at a distinct rotational position of the disk, has linearly independent rows. Another aspect of the invention provides a spectrometry device including: a disk having one or more holes; a motor configured to rotate the disk; one or more beam-shaping optics arranged to map one or more spectral components of radiation of interest onto a plurality of locations on the disk; and a receiver positioned to capture the one or more spectral components passing through the one or more holes as the disk is rotated.

Claims

1. A method of spectrometry, the method comprising:

providing a spectrometry device including;

a disk having one or more holes;

a motor configured to rotate the disk;

one or more beam-shaping optics selected from the group consisting of;

prisms and cylinders, the one or more beam-shaping optics arranged to map one or more spectral components of radiation of interest onto a plurality of locations on the disk; and

a receiver positioned to capture the one or more spectral components passing through the one or more holes as the disk is rotated;

actuating the motor to rotate the disk;

capturing a plurality of spectral components passing through the plurality of holes as the disk rotates; and

computing a spectrum by solving a system of equations wherein a magnitude of one of the plurality of spectral components is equal to a sum of a product of the spectral component in each of a plurality of pixels and the fraction of pixel area backed by the plurality of holes.

2. A spectrometry device comprising:

a disk having a plurality of holes and a contiguous aperture substantially opposite the plurality of holes;

a motor configured to rotate the disk;

a mask defining an imaging window and a spectrometry window;

one or more beam-shaping optics arranged to map one or more spectral components of radiation of interest received through the imaging window and the holes and aperture of the disk onto a plurality of locations on the disk; and

a receiver positioned to capture the one or more spectral components passing through the plurality of holes and the aperture of the disk and the spectrometry window as the disk is rotated.

3. A method of spectrometry, the method comprising:

providing the spectrometry device of claim 2;

actuating the motor to rotate the disk;

capturing a plurality of spectral components passing through the plurality of holes as the disk rotates; and

computing a spectrum by solving a system of equations wherein a magnitude of one of the plurality of spectral components is equal to a sum of a product of the spectral component in each of a plurality of pixels and the fraction of pixel area backed by the plurality of holes.

4. The spectrometry device of claim 2, wherein the one or more beam-shaping optics are selected from the group consisting of:

prisms, cylinders, and minors.

5. The spectrometry device of claim 2, wherein the mask includes a radiation-absorbing material.

6. The spectrometry device of claim 2, wherein the mask includes a radiation-reflecting material.

7. The spectrometry device of claim 2, further comprising:

a storage device.

8. The spectrometry device of claim 7, wherein the storage device includes memory.

9. The spectrometry device of claim 7, wherein the storage device includes one or more storage disks.

10. The spectrometry device of claim 2, further comprising:

a processing device configured to reconstruct the one or more spectral components captured by the receiver to determine the spectral content of the radiation.

11. The spectrometry device of claim 10, wherein the processing device is a computer.

12. The spectrometry device of claim 11, wherein the computer is a general-purpose computer that has been specially-programmed with software.

13. The spectrometry device of claim 2, wherein the aperture is internal to the disk.

14. The spectrometry device of claim 2, wherein the aperture is external to the disk.

15. The method of claim 3, further comprising:

displaying the spectrum.

16. The method of claim 15, wherein the spectrum is displayed on a display device selected from the group consisting of:

a cathode ray tube (CRT), a plasma display, a liquid crystal display (LCD), an organic light-emitting diode display (OLED), a light-emitting diode (LED) display, an electroluminescent display (ELD), a surface-conduction electron-emitter display (SED), a field emission display (FED), a nano-emissive display (NED), an electrophoretic display, a bichromal ball display, an interferometric modulator display, and a bistable nematic liquid crystal display.

17. The method of claim 3, wherein the computing step is performed on a computer.

18. The method of claim 17, wherein the computer is a general-purpose computer that has been specially-programmed with software instructions for executing the storing and forming steps.

19. The method of claim 3, wherein the aperture is internal to the disk.

20. The method of claim 3, wherein the aperture is external to the disk.