Patent US4942588A successfully refreshed from Google Patents.
US4942588A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Laser device
Assignee: Mitsubishi Electric Corp
•
Filing: 1989-07-10
•
Granted: 1990-07-17
•
Expires: 2009-07-10
Abstract
Abstract In a laser device employing an optical resonator which is constructed of a total reflection mirror and a partial reflection mirror, a total reflection plane having an opening is interposed between the partial reflection mirror and the total reflection mirror, the total reflection plane may be formed of, for example, a dielectric thin film or a metallic totally-reflective thin film produced with a cluster ion beam, and the total reflection plane and the total reflection mirror are arranged so as to establish a resonant state. The total reflection plane is formed on an aperture of the partial reflection mirror. The opening of the total reflection plane may be ring-shaped, or a plurality of openings may be provided. The total reflection plane may be located centrally. In a laser device employing an unstable optical resonator, a beam deriving mirror may be disposed within the optical resonator.
Inventors
- 👤 Koji Yasui
- 👤 Masaaki Tanaka
- 👤 Masaki Kuzumoto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 18:53
CPC Classifications
H; H01; H01S; H01S3/00; H01S3/05; H01S3/08; H01S3/081; H01S3/082; H01S3/02; H01S3/03; H01S3/034; H01S3/036
Claims Analysis
Total Claims: 40
Claim 1
Independent Claim
127 words
In a laser device, an optical resonator comprising a first end including a total reflection mirror having a total reflection surface and a second end including a partial reflection mirror having a partial reflecting surface, said total and partial reflection surfaces directly facing each other and forming a first resonant optical cavity; and aperture means disposed within the first resonant optical cavity between the first and second ends including a first surface and a second surface directly facing said total and partial reflecting surfaces, respectively, an opening through which a laser beam may pass, and a total reflection portion disposed on said first surface surrounding the opening, said total reflection portion and said total reflection surface directly facing each other and forming a second resonant optical cavity.
Claim 2
Dependent Claim
127 words
In a laser device, an optical resonator comprising a first end including a total reflection mirror having a total reflection surface and a second end including a partial reflection mirror having a partial reflecting surface, said total and partial reflection surfaces directly facing each other and forming a first resonant optical cavity; and aperture means disposed within the first resonant optical cavity between the first and second ends including a first surface and a second surface directly facing said total and partial reflecting surfaces, respectively, an opening through which a laser beam may pass, and a total reflection portion disposed on said first surface surrounding the opening, said total reflection portion and said total reflection surface directly facing each other and forming a second resonant optical cavity.
Claim 3
Dependent Claim
22 words
A laser device as defined in claim 1 wherein said total reflection portion of said aperture means is a reflective thin film.
Claim 4
Dependent Claim
18 words
A laser device as defined in claim 2 wherein said reflective thin film is a metallic thin film.
Claim 5
Dependent Claim
18 words
A laser device as defined in claim 2 wherein said reflective thin film is a dielectric thin film.
Claim 6
Dependent Claim
24 words
A laser device as defined in claim 1 wherein said aperture means includes a plurality of openings through which the laser beam may pass.
Claim 7
Dependent Claim
22 words
A laser device as defined in claim 5 wherein said total reflection portion of said aperture means is a reflective thin film.
Claim 8
Dependent Claim
18 words
A laser device as defined in claim 6 wherein said reflective thin film is a metallic thin film.
Claim 9
Dependent Claim
18 words
A laser device as defined in claim 6 wherein said reflective thin film is a dielectric thin film.
Claim 10
Dependent Claim
69 words
In a laser device, a stable optical resonator comprising a non-divergent total reflection mirror and a non-divergent output mirror, said output mirror comprising a total reflection portion and an annular partial reflection portion surrounding said total reflection portion through which a laser beam may pass, said total reflection and partial reflection portions both directly facing said total reflection mirror and forming first and second optical resonant cavities therewith, respectively.
Claim 11
Dependent Claim
69 words
In a laser device, a stable optical resonator comprising a non-divergent total reflection mirror and a non-divergent output mirror, said output mirror comprising a total reflection portion and an annular partial reflection portion surrounding said total reflection portion through which a laser beam may pass, said total reflection and partial reflection portions both directly facing said total reflection mirror and forming first and second optical resonant cavities therewith, respectively.
Claim 12
Dependent Claim
18 words
A laser device as defined in claim 9 wherein said total reflection portion is a reflective thin film.
Claim 13
Dependent Claim
18 words
A laser device as defined in claim 10 wherein said reflective thin film is a metallic thin film.
Claim 14
Dependent Claim
18 words
A laser device as defined in claim 9 wherein said reflective thin film is a dielectric thin film.
Claim 15
Dependent Claim
15 words
A laser device as defined in claim 1 wherein said total reflection portion is annular.
Claim 16
Dependent Claim
18 words
A laser device as defined in claim 13 wherein said total reflection portion is a reflective thin film.
Claim 17
Dependent Claim
18 words
A laser device as defined in claim 14 wherein said reflective thin film is a metallic thin film.
Claim 18
Dependent Claim
18 words
A laser device as defined in claim 14 wherein said reflective thin film is a dielectric thin film.
Claim 19
Dependent Claim
18 words
A laser device as defined in claim 9 wherein said total reflection portion is a reflective thin film.
Claim 20
Dependent Claim
18 words
A laser device as defined in claim 17 wherein said reflective thin film is a metallic thin film.
Claim 21
Dependent Claim
18 words
A laser device as defined in claim 17 wherein said reflective thin film is a dielectric thin film.
Claim 22
Dependent Claim
73 words
In a laser device, an unstable optical resonator including first and second total reflection mirrors directly facing each other and forming a first optical resonator cavity, and an aperture defined by a total reflection surface having an opening, said aperture being disposed within said first cavity between said first and second total reflection mirrors with the total reflection surface directly facing said first total reflection mirror and forming a second optical resonant cavity.
Claim 23
Dependent Claim
73 words
In a laser device, an unstable optical resonator including first and second total reflection mirrors directly facing each other and forming a first optical resonator cavity, and an aperture defined by a total reflection surface having an opening, said aperture being disposed within said first cavity between said first and second total reflection mirrors with the total reflection surface directly facing said first total reflection mirror and forming a second optical resonant cavity.
Claim 24
Dependent Claim
27 words
A laser device as defined in claim 20 including a beam deriving mirror disposed within said first optical resonant cavity for directing light out of said device.
Claim 25
Dependent Claim
18 words
A laser device as defined in claim 20 wherein said total reflection plane is a reflective thin film.
Claim 26
Dependent Claim
18 words
A laser device as defined in claim 22 wherein said reflective thin film is a metallic thin film.
Claim 27
Dependent Claim
18 words
A laser device as defined in claim 22 wherein said reflective thin film is a dielectric thin film.
Claim 28
Dependent Claim
18 words
A laser device as defined in claim 1 wherein said laser device is an axial-flow type laser device.
Claim 29
Dependent Claim
18 words
A laser device as defined in claim 9 wherein said laser device is an axial-flow type laser device.
Claim 30
Dependent Claim
18 words
A laser device as defined in claim 20 wherein said laser device is an axial-flow type laser device.
Claim 31
Dependent Claim
104 words
In a laser device, a stable optical resonator comprising a non-divergent reflection mirror, a partial reflection mirror, a non-divergent first total reflection surface disposed at the central portion of said partial reflection mirror, an aperture disposed proximate said partial reflection mirror, said aperture being surrounded by a second total reflection surface directly facing said non-divergent first total reflection surface, said first total reflection surface and said partial reflection mirror directly facing each other and forming a first resonant optical cavity, and said second total reflection surface and said non-divergent first total reflection mirror directly facing each other and forming a second resonant optical cavity.
Claim 32
Dependent Claim
104 words
In a laser device, a stable optical resonator comprising a non-divergent reflection mirror, a partial reflection mirror, a non-divergent first total reflection surface disposed at the central portion of said partial reflection mirror, an aperture disposed proximate said partial reflection mirror, said aperture being surrounded by a second total reflection surface directly facing said non-divergent first total reflection surface, said first total reflection surface and said partial reflection mirror directly facing each other and forming a first resonant optical cavity, and said second total reflection surface and said non-divergent first total reflection mirror directly facing each other and forming a second resonant optical cavity.
Claim 33
Dependent Claim
18 words
A laser device as claimed in claim 28 wherein said total reflection surface is a reflective thin film.
Claim 34
Dependent Claim
18 words
A laser device as claimed in claim 29 wherein said reflective thin film is a metallic thin film.
Claim 35
Dependent Claim
18 words
A laser device as claimed in claim 29 wherein said reflective thin film is a dielectric thin film.
Claim 36
Dependent Claim
20 words
A laser device as claimed in claim 28 wherein said laser beam device is an axial flow type laser device.
Claim 37
Dependent Claim
21 words
A laser device as defined in claim 28 wherein said second total reflection surface is disposed on said partial reflection mirror.
Claim 38
Dependent Claim
18 words
A laser device as defined in claim 28 wherein said non-divergent total reflection mirror is a convergent mirror.
Claim 39
Dependent Claim
22 words
A laser device as defined in claim 28 wherein said non-divergent first total reflection surface is disposed on said partial reflection mirror.
Claim 40
Dependent Claim
23 words
A laser device as defined in claim 1 wherein said second surface of said aperture means is disposed on said partial reflection mirror.
References Cited (Backward Citations)
US3466566A
Cited
DE1639038A1
Cited
US3503671A
Cited
DE2050277A1
Cited
US3681709A
Cited
US3663890A
Cited
US3852684A
Cited
US3889209A
Cited
US4327129A
Cited
DE2449123A1
Cited
US3937079A
Cited
US4050036A
Cited
US4156209A
Cited
US4126381A
Cited
US4170405A
Cited
US4287482A
Cited
US4360925A
Cited
JPS6017974A
Cited
JPS605578A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-07-16 | 1994-01-15 | 1994-07-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-07-16 | 1998-01-15 | 1998-07-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-07-16 | 2002-01-15 | 2002-07-17 | $7700.00 | Window Closed / Lapsed |