Patent US4981613A successfully refreshed from Google Patents.
US4981613A
Expired / Lapsed
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Laser light source
Assignee: Fujifilm Holdings Corp
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Filing: 1987-11-04
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Granted: 1991-01-01
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Expires: 2007-11-04
Abstract
Abstract A light source composed of a semiconductor laser and a nonlinear optical element which converts a laser beam emitted from the semiconductor laser to a laser beam having a shorter wavelength, disposed in the path of a laser beam produced by the laser, the nonlinear optical element containing a compound represented by formula (I): ##STR1## wherein Z 1 , Z 2 , X and n are as defined in the specification, of formula (II) ##STR2## wherein Z 3 and Z 4 are defined in the specification, or an acid adduct therefore. the nonlinear optical element exhibits high transmittances to blue light and generates a laser beam having a shorter wavelength than that of the laser applied.
Inventors
- 👤 Masaki Okazaki
- 👤 Seiiti Kubodera
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 23:04
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/35; G02F1/355; G02F1/361; G02F1/3611; G02F1/3612
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
114 words
A light source comprising a semiconductor laser and a nonlinear optical element capable of converting a laser beam emitted from the semiconductor laser to a laser beam of shorter wavelength, disposed in the path of a laser beam produced by said laser, said nonlinear optical element comprising a compound represented by formula (VII), or an acid adduct formed with a carboxylic acid, a sulfonic acid, sulfuric acid, hydrochloric acid, nitric acid or phosphoric acid thereof ##STR12## wherenin Z 8 represents a pyrrole ring, an imidazole ring, a pyrazole ring, a benzimidazole ring or a triazole ring, each of which ring may be substituted with at least one of methyl group and an ethyl group.
Claim 2
Dependent Claim
114 words
A light source comprising a semiconductor laser and a nonlinear optical element capable of converting a laser beam emitted from the semiconductor laser to a laser beam of shorter wavelength, disposed in the path of a laser beam produced by said laser, said nonlinear optical element comprising a compound represented by formula (VII), or an acid adduct formed with a carboxylic acid, a sulfonic acid, sulfuric acid, hydrochloric acid, nitric acid or phosphoric acid thereof ##STR12## wherenin Z 8 represents a pyrrole ring, an imidazole ring, a pyrazole ring, a benzimidazole ring or a triazole ring, each of which ring may be substituted with at least one of methyl group and an ethyl group.
Claim 3
Dependent Claim
20 words
The light source as claimed in claim 1, wherein said nonlinear optical element is a single crystal waveguide optical element.
Claim 4
Dependent Claim
19 words
The light source as claimed in claim 1, wherein said nonlinear optical element is a single crystal optical element.
Claim 5
Dependent Claim
20 words
The light source as claimed in claim 1, wherein said optical element is an organic crystal cored fiber optical element.
Claim 6
Dependent Claim
17 words
The light source as claimed in claim 2, wherein said optical element is a buried waveguide element.
Claim 7
Dependent Claim
17 words
The light source as claimed in claim 2, wherein said optical element is a tapered waveguide element.
Claim 8
Dependent Claim
49 words
The light source as claimed in claim 1, wherein said semiconductor laser is capable of emitting a laser beam having a wavelength of 0.78 to 1.3 μm and said light source is capable of converting said beam into a laser beam having a wavelength of 0.39 to 0.65 μm.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-12-31 | 1994-07-02 | 1995-01-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-12-31 | 1998-07-02 | 1999-01-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-12-31 | 2002-07-02 | 2003-01-01 | $7700.00 | Window Closed / Lapsed |