Patent EP0095821A1 successfully refreshed from Google Patents.
US3704377A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Laser comprising fresnel optics
Assignee: Inventors and Investors Inc
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Filing: 1970-07-10
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Granted: 1972-11-28
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Expires: 1990-07-10
Abstract
Abstract This invention concerns improved structures for the transformation of radiant energy into electric energy or vice versa. The improvement consists of combining a semiconducting microcircuit element with a Fresnel optical system into a compact integrated structure.
Inventors
- 👤 Kurt Lehovec
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 07:43
CPC Classifications
H; H01; H01S; H01S5/00; H01S5/30; G; G02; G02B; G02B5/00; G02B5/18; G02B5/1876; G03; G03F; G03F7/00; G03F7/70; G03F7/70383; H01J; H01J29/00; H01J29/02; H01J29/10; H01S5/02; H01S5/026; H10; H10F; H10F30/00; H10F30/20; H10F30/21; H10F30/28; H10F30/282; H10F77/00; H10F77/40; H10F77/413
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
35 words
A solid state laser structure including optical pumping, said structure comprising a laser material and a diffractive Fresnel optical system in intimate inseparable combination, said Fresnel optical system concentrating pump radiation on said laser material.
Claim 2
Dependent Claim
35 words
A solid state laser structure including optical pumping, said structure comprising a laser material and a diffractive Fresnel optical system in intimate inseparable combination, said Fresnel optical system concentrating pump radiation on said laser material.
Claim 3
Dependent Claim
92 words
An integrated electro-optical device comprising a semiconducting body capable of emitting radiation by the transition of excited electrons into lower energy states, a solid layer transparent to said radiation adjacent to the surface of said body, a Fresnel optical system on the outer surface of said transparent layer, said Fresnel optical system focussing incident pump radiation on said surface of the semiconducting body, said pump radiation being of a wavelength capable to generate said excited electrons; said semiconducting body, said transparent solid layer and said Fresnel optical system in intimate inseparable combination.
Claim 4
Dependent Claim
92 words
An integrated electro-optical device comprising a semiconducting body capable of emitting radiation by the transition of excited electrons into lower energy states, a solid layer transparent to said radiation adjacent to the surface of said body, a Fresnel optical system on the outer surface of said transparent layer, said Fresnel optical system focussing incident pump radiation on said surface of the semiconducting body, said pump radiation being of a wavelength capable to generate said excited electrons; said semiconducting body, said transparent solid layer and said Fresnel optical system in intimate inseparable combination.
Claim 5
Dependent Claim
36 words
The integrated electro-optical device of claim 2, including a semitransparent conducting film over a small portion of the outer surface of said transparent layer and electrical contacts to said semitransparent film and to said semiconducting body.
Claim 6
Dependent Claim
16 words
The device of claim 3 whereby said semitransparent film is part of said Fresnel optical system.
Claim 7
Dependent Claim
26 words
The device of claim 3 whereby said transparent layer is dimensioned with respect to the wavelength of said radiation to be part of an optical cavity.
Claim 8
Dependent Claim
36 words
A solid state laser including a transparent layer on one of its surfaces, a diffractive Fresnel optical system on said transparent layer to shape the radiation emitted from said laser through said one of its surfaces.
Claim 9
Dependent Claim
36 words
A solid state laser including a transparent layer on one of its surfaces, a diffractive Fresnel optical system on said transparent layer to shape the radiation emitted from said laser through said one of its surfaces.
Claim 10
Dependent Claim
85 words
A solid state laser comprising transparent layer hAving two plane parallel surfaces, a diffractive Fresnel optical system comprising spaced zones on one of its surfaces in solid inseparable combination with it, the width of said transparent layer between said plane parallel surfaces chosen in relation to the spacing of the zones of said diffractive Fresnel optical system and to the wavelength of a beam of coherent monochromatic radiation incident under a suitable angle and passing through said diffractive Fresnel optical system and said transparent layer.
Claim 11
Dependent Claim
85 words
A solid state laser comprising transparent layer hAving two plane parallel surfaces, a diffractive Fresnel optical system comprising spaced zones on one of its surfaces in solid inseparable combination with it, the width of said transparent layer between said plane parallel surfaces chosen in relation to the spacing of the zones of said diffractive Fresnel optical system and to the wavelength of a beam of coherent monochromatic radiation incident under a suitable angle and passing through said diffractive Fresnel optical system and said transparent layer.
References Cited (Backward Citations)
US2043347A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-11-28 | 1976-05-29 | 1976-11-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-11-28 | 1980-05-29 | 1980-11-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-11-28 | 1984-05-29 | 1984-11-28 | $7700.00 | Window Closed / Lapsed |