Method for processing spatial-phase characteristics of electromagnetic energy and information conveyed therein

• US 20020181761A1
• Filed: 05/04/2001
• Published: 12/05/2002
• Est. Priority Date: 05/04/2001
• Status: Active Grant

• Current Assignee: Photon-X, Inc.
• Original Assignee: Photon-X, Inc.
• Inventors: Barbour, Blair A.
• Granted Patent: US 6,810,141 B2
• Time in Patent Office: Days
• US Class Current: 382/154
• CPC Class Codes: G01J 4/00 Measuring polarisation of light
• CPC Class Codes: G01J 9/00 Measuring optical phase difference devices or arrangements for controlling the phase of light beams G02F1/01; Determining degree of coherence; Measuring optical wavelength spectrometry G01J3/00
• CPC Class Codes: G06F 18/00 Pattern recognition

Abstract

A method of deriving increased information from electromagnetic energy. Values of any of several spatial phase characteristics of the electromagnetic energy are determined. The determined spatial phase characteristic values are used in a manner to provide information.

Claims

1. A method of deriving increased information from electromagnetic energy, said method comprising:

determining values of any of several spatial phase characteristics of the electromagnetic energy; and

using the determined spatial phase characteristic values in a manner to provide information.

2. A method as set forth in claim 1, wherein said step of determining values of any of several spatial phase characteristics of the electromagnetic energy includes determining at least one spatial phase characteristic value at each of a plurality of point elements of an image plane associated with the electromagnetic energy, and said step of using the determined spatial phase characteristic values in a manner to provide information includes using differences in the determined at least one spatial phase characteristic values at each of a plurality of point elements to generate an image.

3. A method as set forth in claim 2, wherein said step of determining at least one spatial phase characteristic value at each of a plurality of point elements of an image plane associated with the electromagnetic energy includes determining a non-intensity spatial phase characteristic value at each of the plurality of point elements.

4. A method as set forth in claim 3, wherein said step of determining a non-intensity spatial phase characteristic value at each of the plurality of point elements includes determining a polarization characteristic value at each of the plurality of point elements.

5. A method as set forth in claim 3, wherein said step of using the determined spatial phase characteristic values in a manner to provide information includes providing a three-dimensional representation value at each of the plurality of point elements that is dependent upon the determined non-intensity spatial phase characteristic value at the respective point element.

6. A method as set forth in claim 3, wherein said step of determining at least one spatial phase characteristic value at each of a plurality of point elements of an image plane associated with the electromagnetic energy includes determining the non-intensity spatial phase characteristic value at each of the plurality of point elements with the electromagnetic energy having minimal intensity contrast among the plurality of point elements, and said step of using the determined spatial phase characteristic values in a manner to provide information includes providing a contrast-indicative representation value at each of the plurality of point elements that is dependent upon the determined non-intensity spatial phase characteristic value at the respective point element.

7. A method as set forth in claim 1, wherein said step of determining values of any of several spatial phase characteristics of the electromagnetic energy includes determining at least one spatial phase characteristic value at each of a plurality of portions of a conveyed electromagnetic energy, and said step of using the determined spatial phase characteristic values in a manner to provide information includes using differences in the determined at least one spatial phase characteristic values at each of a plurality of portions to demodulate a data stream.

8. A method as set forth in claim 1, including sensory operation of a non-spatial phase sensor, determining value of at least one non-spatial phase characteristic, and using the determined value of the at least one non-spatial phase characteristic to provide information, the information determined from the spatial phase characteristic being used in conjunction with the information determined from the spatial phase characteristic to provide an increase volume of information.

9. A method of deriving increased information from electromagnetic energy, said method comprising:

determining one quantitative-existence value related to at least one spatial phase characteristic of the electromagnetic energy for one portion of electromagnetic energy;

determining another quantitative-existence value related to at least another spatial phase characteristic of the electromagnetic energy for the one portion of electromagnetic energy or the one spatial phase characteristic of the electromagnetic energy for another portion of electromagnetic energy;

quantifying the one quantitative-existence value relative to the other quantitative-existence value; and

using the quantification of the one quantitative-existence value relative to the other quantitative-existence value as information.

10. A method as set forth in claim 9, wherein said step of determining the one quantitative-existence value includes calculating a value of the one spatial phase characteristic as the one quantitative-existence value.

11. A method as set forth in claim 10, wherein said step of calculating a value of the one spatial phase characteristic as the one quantitative-existence value includes calculating a polarization value.

12. A method as set forth in claim 9, wherein said step of determining the one quantitative-existence value includes using a value of the one spatial phase characteristic in an algorithm whose product is the one quantitative-existence value.

13. A method as set forth in claim 12, wherein said algorithm is a stokes vector equation.

14. A method as set forth in claim 9, wherein said step of determining another quantitative-existence value is the determination of the value related to at least another spatial phase characteristic of the electromagnetic energy for the one portion of electromagnetic energy.

15. A method as set forth in claim 14, wherein the one and another quantitative-existence values are two, different polarization values.

16. A method as set forth in claim 14, wherein the one and another quantitative-existence values are the products of two, different stokes vector equations.

17. A method as set forth in claim 9, wherein said step of determining another quantitative-existence value is the determination of the one spatial phase characteristic of the electromagnetic energy for another portion of electromagnetic energy.

18. A method as set forth in claim 17, wherein the one and the other portions of the electromagnetic energy are two, different points on an image matrix.

19. A method as set forth in claim 17, wherein the one and the other portions of the electromagnetic energy are different portions derived at different time points.

20. A method as set forth in claim 9, wherein said step of using the quantification of the one quantitative-existence value relative to the other quantitative-existence value includes using differences to demodulate a data stream.