Method and optical switch for altering an electromagnetic energy wave in response to acceleration forces

• US 6,661,566 B2
• Filed: 09/20/2001
• Issued: 12/09/2003
• Est. Priority Date: 09/20/2001
• Status: Active Grant

• Current Assignee: The Government Of The United States Of America, As Represented By The Secretary Of The Navy
• Original Assignee: the united states of america as represented by the secretary of the navy
• Inventors: Poirier, Peter M., Russell, Stephen D., Ramirez, Ayax D.
• Primary Examiner(s): Font, Frank G.
• Assistant Examiner(s): Kianni, Kevin
• Application Number:
  US09/956,710
• Publication Number:
  US 20030053746A1
• Time in Patent Office: 810 Days
• Field of Search: 385/23, 385/11, 385/16, 385/12, 359/320
• US Class Current: 359/320
• CPC Class Codes: G01P 15/0891 with indication of predetermined acceleration values G01P15/135 takes precedence
• CPC Class Codes: G01P 15/093 by photoelectric pick-up
• CPC Class Codes: G02B 26/06 for controlling the phase of light G02B26/08 takes precedence , measuring optical phase difference G01J9/00
• CPC Class Codes: G02B 26/08 for controlling the direction of light in light guides G02B6/35

Abstract

An aspect of an electromagnetic energy wave is altered by disposing in its propagation path a material that changes optical properties in response to an acceleration force.

Claims

1. A method of altering an aspect of an electromagnetic energy wave in response to an acceleration force, said method comprising the step of interposing in a propagation path of said electromagnetic energy wave, a material that changes from a solid state to a liquid state in response to said acceleration force, and changes back to said solid state in absence of said acceleration force, the optical properties of said material in said liquid state being different than the optical properties in said solid state, such that said change from one of said states to the other said state results in altering said aspect of said electromagnetic energy wave.

2. The method of altering an aspect of an electromagnetic energy wave as recited in claim 1 wherein said material alters said propagation path of said energy wave when said material changes between said states.

3. The method of altering an aspect of an electromagnetic energy wave as recited in claim 2 wherein said material substantially reflects said energy wave when said material changes from one of its said states to the other.

4. The method of altering an aspect of an electromagnetic energy wave as recited in claim 2 wherein said material substantially refracts said energy wave when said material changes between said states.

5. The method of altering an aspect of an electromagnetic energy wave as recited in claim 1 wherein said material alters the intensity of said energy wave when said material changes between said states.

6. The method of altering an aspect of an electromagnetic energy wave as recited in claim 1 wherein said material alters the polarization of said energy wave when said material changes between said states.

7. An optical switch, having an on condition and an off condition, comprising:

(a) an electromagnetic energy source for generating a electromagnetic energy wave;

(b) an electromagnetic energy sensor for detecting said electromagnetic energy wave;

(c) a material disposed in the propagation path of said electromagnetic energy wave between said electromagnetic energy source and said electromagnetic energy sensor, for altering an aspect of said energy wave by changing from a solid state to a liquid state in response to an acceleration force, and by changing back to said solid state in the absence of said acceleration force, the optical properties of said material in said liquid state being different than the optical properties in said solid state, such that said altering of said energy wave aspect results in said switch changing between said conditions.

8. The optical switch as recited in claim 7 wherein said material alters said propagation path when said material changes between said states.

9. The optical switch as recited in claim 8 wherein said material substantially reflects said energy wave when said material changes from one of its said states to the other.

10. The optical switch as recited in claim 8 wherein said material substantially refracts said energy wave when said material changes between said states.

11. The optical switch as recited in claim 7 wherein said material alters the polarization of said energy wave when said material changes between said states.

12. The optical switch as recited in claim 7 wherein said material alters the intensity of said energy wave when said material changes between said states.

13. The optical switch as recited in claim 7 wherein said electromagnetic energy source is a light source.

14. The optical switch as recited in claim 13 wherein said light source is a laser.

15. The optical switch as recited in claim 13 wherein said light source is a light emitting diode.

16. The optical switch as recited in claim 13 wherein said light source is a lamp.

17. The optical switch as recited in claim 7 wherein said electromagnetic energy sensor is a light sensor.

18. The optical switch as recited in claim 17 wherein said light sensor is a photodiode.

19. The optical switch as recited in claim 17 wherein said light sensor is a phototransistor.

20. In an acceleration responsive optical switch having an electromagnetic energy wave source and an electromagnetic energy wave sensor, an improvement comprising a material disposed in a propagation path of an electromagnetic energy wave between said electromagnetic energy source and said electromagnetic energy wave sensor, for altering an aspect of said energy wave by changing from a solid state to a liquid state in response to an acceleration force, and by changing back to said solid state in the absence of said acceleration force, the index of refraction of said material in said liquid state being different than the index of refraction of said material in said solid state.

21. The improvement as recited in claim 20 wherein said material alters said propagation path of said electromagnetic energy wave when said material changes between said states.

22. The improvement as recited in claim 21 wherein said material substantially reflects said electromagnetic energy wave when said material changes from said solid to said liquid state.

23. The improvement as recited in claim 21 wherein said material substantially refracts said electromagnetic energy wave when said material changes between said states.

24. The improvement as recited in claim 20 wherein said material alters the intensity of said electromagnetic energy wave when said material changes between said states.