Patent US3934154A successfully refreshed from Google Patents.
US3934154A
Expired / Lapsed
US
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Source of ultraviolet light employing a laser pumped borate crystal
Assignee: Individual
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Filing: 1975-02-18
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Granted: 1976-01-20
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Expires: 1995-02-18
Abstract
Abstract This invention pertains to an ultraviolet light generator which mixes, or frequency doubles, light by means of a borate crystal such as AB 5 O 8 .4H 2 O where A=Ammonium (NH 4 ), Potassium (K), Rubidium (Rb), or Cesium (Cs). This ultraviolet light generator is pumped with a dye laser capable of emitting coherent light of wavelengths from 4000 to 5600 A (Angstroms) to generate phase matched second harmonics between about 2150 A and 2650 A, a range not readily attained by systems using other crystals.This application is a continuation-in-part application of applicant's copending application Ser. No. 572,995, filed May 24, 1974, now abandoned.
Inventors
- 👤 William R. Cook, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 19:44
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/35; G02F1/355; G02F1/3551
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
68 words
A device for the generation of coherent light in the wavelength range from 2000 A to 2800 A comprising an optically nonlinear crystal element of a pentaborate compound of the formula AB 5 O 8 .4H 2 O, with A from the group NH 4 , K, Rb, or Cs, and means to illuminate said crystal element with coherent light of at least wavelength greater than 2800 A.
Claim 2
Independent Claim
68 words
A device for the generation of coherent light in the wavelength range from 2000 A to 2800 A comprising an optically nonlinear crystal element of a pentaborate compound of the formula AB 5 O 8 .4H 2 O, with A from the group NH 4 , K, Rb, or Cs, and means to illuminate said crystal element with coherent light of at least wavelength greater than 2800 A.
Claim 3
Dependent Claim
78 words
An optical second harmonic generator of the type in which a transparent crystal having a significant second order nonlinear coefficient is pumped by a fundamental optical beam to produce a second harmonic optical beam of a wavelength below 2800 A, said generator being characterized in that the said crystal is a crystal of a pentaborate compound of the formula AB 5 O 8 .4H 2 O, with A from the group NH 4 , K, Rb, or Cs.
Claim 4
Dependent Claim
78 words
An optical second harmonic generator of the type in which a transparent crystal having a significant second order nonlinear coefficient is pumped by a fundamental optical beam to produce a second harmonic optical beam of a wavelength below 2800 A, said generator being characterized in that the said crystal is a crystal of a pentaborate compound of the formula AB 5 O 8 .4H 2 O, with A from the group NH 4 , K, Rb, or Cs.
Claim 5
Dependent Claim
27 words
A generator of the type claimed in claim 2, characterized in that said crystal is a crystal of potassium pentaborate, KB 5 O 8 H 2 O.
Claim 6
Dependent Claim
29 words
A generator of the type claimed in claim 2, characterized in that said crystal is a crystal of ammonium pentaborate, NH 4 B 5 O 8 .4H 2 O.
Claim 7
Dependent Claim
41 words
A generator of the type claimed in claim 3, wherein the direction of optical transmission is rotated from the b axis towards the c axis in any position from 0° to 90°, and is rotated towards a no more than 45°.
Claim 8
Dependent Claim
41 words
A generator of the type claimed in claim 4, wherein the direction of optical transmission is rotated from the b axis towards the c axis in any position from 0° to 90° and is rotated towards a no more than 45°.
References Cited (Backward Citations)
US3721831A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-01-19 | 1979-07-21 | 1980-01-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-01-19 | 1983-07-21 | 1984-01-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-01-19 | 1987-07-21 | 1988-01-20 | $7700.00 | Window Closed / Lapsed |