Claims
- 1. A fiberoptic velocity transducer comprising:
- a plurality of polarized light propagators for propagating polarized light energy having a plurality of light energy wavelengths;
- magneto-optical material for causing a Faraday rotation in a first pre-determined range of wavelengths of said light energy;
- a dielectric filter for selectively passing the first pre-determined range of wavelengths of the polarized light energy from said propagating means through said magneto-optical material and for selectively reflecting a second pre-determined range of wavelengths of the polarized light energy to prevent the second pre-determined range of wavelengths of light from passing through said magneto-optical material; and
- a reflector for reflecting the light energy passing through said magneto-optical material.
- 2. The fiberoptic velocity transducer of claim 1, wherein said plurality of polarized light propagators comprises a fiberoptic line.
- 3. The fiberoptic velocity transducer of claim 1, further comprising means for collimating light energy.
- 4. The fiberoptic velocity transducer of claim 3, wherein said collimating means is a lens.
- 5. The fiberoptic velocity transducer of claim 3, wherein said collimating means is a GRIN lens.
- 6. The fiberoptic velocity transducer of claim 2, further comprising means for coupling said plurality of light energy wavelengths.
- 7. The fiberoptic velocity transducer of claim 6, wherein said coupling means is a 2.times.1 coupler.
- 8. The fiberoptic velocity transducer of claim 1, wherein said plurality of polarized light propagators comprises a plurality of input/output fibers.
- 9. The fiberoptic velocity transducer of claim 1, wherein said dielectric filter comprises a dielectric coating affixed to said magneto-optical material.
- 10. The fiberoptic velocity transducer of claim 1, wherein said magneto-optical material is adapted to cause a Faraday rotation in said first pre-determined range of wavelengths of light energy.
- 11. The fiberoptic velocity transducer of claim 1, wherein said reflector is a mirror.
- 12. The fiberoptic velocity transducer of claim 1, wherein said reflector is a reflective coating.
- 13. The fiberoptic velocity transducer of claim 1, wherein said reflector is adapted to reflect said first pre-determined range of wavelengths of light energy.
- 14. The fiberoptic velocity transducer of claim 2, wherein said light energy is reflected back through a path to said plurality of light sources.
- 15. A fiberoptic velocity transducer comprising:
- a coupler for coupling a plurality of polarized light energy wavelengths;
- a magneto-optic material that causes a Faraday rotation in polarized light energy;
- a dielectric coating affixed to said magneto-optic material, said dielectric coating operating to selectively pass a first pre-determined range of wavelengths of polarized light energy through said magneto-optic material and to selectively reflect a second pre-determined range of wavelengths of polarized light energy away from said magneto-optic material;
- and a reflector for reflecting polarized light energy passing through said magneto-optic material.
- 16. The fiberoptic velocity transducer of claim 15, wherein said coupler is a 2.times.1 coupler.
- 17. The fiberoptic velocity transducer of claim 15, further comprising means for collimating light energy.
- 18. The fiberoptic velocity transducer of claim 17, wherein said reflector is a mirror and said collimating means is a lens.
Parent Case Info
This is a continuation of application Ser. No. 08/431,905, filed May 1, 1995, now U.S. Pat. No. 5,617,022.
US Referenced Citations (21)
Foreign Referenced Citations (2)
Number |
Date |
Country |
A-0568992 |
Oct 1993 |
EPX |
WO-A-8906364 |
Jul 1989 |
WOX |
Non-Patent Literature Citations (3)
Entry |
European Search Report--Appln. No. EP 96 30 3026--Dated 11 Jul. 1996--Examiner: Nessman, C. |
Patent Abstract Appln.# JP840232888 Dated May 11, 1984. |
Patent Abstract Appln.# JP810173598 Dated Oct. 28, 1981. |
Continuations (1)
|
Number |
Date |
Country |
Parent |
431905 |
May 1995 |
|