Patent US4612456A successfully refreshed from Google Patents.
US4612456A
Expired / Lapsed
US
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Apparatus and method for generating light having a wavelength in the range of approximately 250-550 nanometers
Assignee: ConocoPhillips Co
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Filing: 1982-09-02
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Granted: 1986-09-16
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Expires: 2002-09-02
Abstract
Abstract A source of linearly polarized light having a wavelength selected from the range of about 500 to 1100 nanometers provides light into one end of an optical fiber. A nonlinear crystal of the type that mixes the frequency of light passing therethrough is positioned adjacent the other end of the fiber. The fiber transmits light from the source to the crystal which increases its frequency up to 100%, dependent upon crystal selection, thereby providing light in the 250-550 nanometer wavelength range. Adjusting the radial orientation of the crystal with respect to the fiber optimizes conversion of light to the 250-550 nanometer range.
Inventors
- 👤 John S. Gergely
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 05:27
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/35; G02F1/37; G02F1/353; G02F1/3534
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
147 words
Apparatus for generating ultraviolet light at a remote position comprising: a source of linearly polarized light having a wavelength range of about 500 to 1100 nanometers; a non-linear crystal; an optical fiber having one end positioned adjacent said light source to permit transmission of said light within said fiber and the other end positioned adjacent said crystal to receive transmitted light therethrough; a pair of lenses, one lens interposed between the other end of said fiber and said crystal and the other placed adjacent said crystal in the path of light emerging therefrom; and index-matching fluid having an index of refraction that is substantially the same as said lenses and said crystal, said fluid occupying the space between said lenses in envelopment of said non-linear crystal; whereby light emanating from said non-linear crystal is much increased in frequency relative to the linearly polarized light from said source.
Claim 2
Dependent Claim
147 words
Apparatus for generating ultraviolet light at a remote position comprising: a source of linearly polarized light having a wavelength range of about 500 to 1100 nanometers; a non-linear crystal; an optical fiber having one end positioned adjacent said light source to permit transmission of said light within said fiber and the other end positioned adjacent said crystal to receive transmitted light therethrough; a pair of lenses, one lens interposed between the other end of said fiber and said crystal and the other placed adjacent said crystal in the path of light emerging therefrom; and index-matching fluid having an index of refraction that is substantially the same as said lenses and said crystal, said fluid occupying the space between said lenses in envelopment of said non-linear crystal; whereby light emanating from said non-linear crystal is much increased in frequency relative to the linearly polarized light from said source.
Claim 3
Dependent Claim
22 words
The apparatus of claim 1 which further includes means for selectively fixing the radial orientation of said crystal relative to said fiber.
Claim 4
Dependent Claim
23 words
The apparatus of claim 1 wherein the side of said crystal adjacent the other end of said fiber is oriented at Brewer's angle.
Claim 5
Dependent Claim
25 words
Apparatus as set forth in claim 1 wherein: said light emanting from the non-linear crystal has a wavelength in the ultraviolet range of 250-550 nonometers.
Claim 6
Dependent Claim
21 words
Apparatus as set forth in claim 1 which further includes: means for selectively collimating the light transmitted through said other lens.
Claim 7
Dependent Claim
21 words
Apparatus as set forth in claim 1 which further includes: means for selectively focusing the light transmitted through said other lens.
Claim 8
Independent Claim
113 words
A method for providing light at a location remote from a source of polarized light used to generate such light, such provided light having a high frequency with respect to the source light, comprising the steps of: transmitting such polarized light in an optical fiber; positioning a non-linear crystal in the path of such transmitted light at the other end of the optical fiber; and rotating the crystal about its longitudinal axis relative to the fiber to optimize frequency mixing of the transmitted light; whereby the transmitted light has a wavelength within the 600 to 800 nanometer range and the provided light from said non-linear crystal has a wavelength in the ultraviolet range.
Claim 9
Independent Claim
113 words
A method for providing light at a location remote from a source of polarized light used to generate such light, such provided light having a high frequency with respect to the source light, comprising the steps of: transmitting such polarized light in an optical fiber; positioning a non-linear crystal in the path of such transmitted light at the other end of the optical fiber; and rotating the crystal about its longitudinal axis relative to the fiber to optimize frequency mixing of the transmitted light; whereby the transmitted light has a wavelength within the 600 to 800 nanometer range and the provided light from said non-linear crystal has a wavelength in the ultraviolet range.
Claim 10
Independent Claim
17 words
The method of claim: 7 which further includes the step of orienting said crystal at Brewster's angle.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1989-09-15 | 1990-03-17 | 1990-09-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-09-15 | 1994-03-17 | 1994-09-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-09-15 | 1998-03-17 | 1998-09-16 | $7700.00 | Window Closed / Lapsed |