Patent US2672267A successfully refreshed from Google Patents.
Patent US4328468A successfully refreshed from Google Patents.
US4328468A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multipass laser optics for light deflector
Assignee: Unisys Corp
•
Filing: 1980-01-16
•
Granted: 1982-05-04
•
Expires: 2000-01-16
Abstract
Abstract An apparatus for and a method of providing an amplified, directable laser light beam is disclosed. The apparatus includes two optical cavities sharing a common mirror. The first cavity is resonant and contains a laser rod intermediate a high reflectivity reflecting mirror of 100% reflectivity and a low reflectivity transmitting mirror of 10-90% reflectivity. The second cavity is antiresonant and contains a Faraday effect diffraction grating intermediate the low reflectivity mirror and a 100% reflectivity mirror. The laser light beam that passes through the transmitting mirror is directed normally incident to the surface of and passes through the Faraday effect diffraction grating. On the far side of the diffraction grating is a mirror of 100% reflectivity, which reflects the laser light beam back through the diffraction grating forming a pair of diffracted congruent 1'st order light beams and a single undiffracted 0'th order light beam. The 0'th order light beam is directed back through the transmitting mirror, through the laser rod to be reflected between its reflecting and transmitting mirrors and to again pass through the transmitting mirror onto the diffraction grating to provide 1'st order light beams of increased intensity.
Inventors
- 👤 John A. Krawczak
- 👤 Ernest J. Torok
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 15:54
CPC Classifications
H; H01; H01S; H01S3/00; H01S3/05; H01S3/08; H01S3/081; H01S3/082
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
136 words
A multipass optic system, comprising: a resonant cavity comprising; a first reflecting mirror of substantially 100% reflectivity, and a partially reflecting mirror; an antiresonant cavity comprising; said partially reflecting mirror, a Faraday effect diffraction grating, and a second reflecting mirror of substantially 100% reflectivity on the far side of said diffraction grating; a light beam source oriented within said resonant cavity; said partially reflecting mirror oriented for optically coupling said light beam from said resonant cavity to said antiresonant cavity; means coupled to said diffraction grating for varying the diffraction characteristics of said diffraction grating for generating from said light beam a single 0'th order light beam and two congruent 1'st order light beams and said partially reflecting mirror oriented for optically coupling said 0'th order light beam between said antiresonant cavity and said resonant cavity.
Claim 2
Dependent Claim
136 words
A multipass optic system, comprising: a resonant cavity comprising; a first reflecting mirror of substantially 100% reflectivity, and a partially reflecting mirror; an antiresonant cavity comprising; said partially reflecting mirror, a Faraday effect diffraction grating, and a second reflecting mirror of substantially 100% reflectivity on the far side of said diffraction grating; a light beam source oriented within said resonant cavity; said partially reflecting mirror oriented for optically coupling said light beam from said resonant cavity to said antiresonant cavity; means coupled to said diffraction grating for varying the diffraction characteristics of said diffraction grating for generating from said light beam a single 0'th order light beam and two congruent 1'st order light beams and said partially reflecting mirror oriented for optically coupling said 0'th order light beam between said antiresonant cavity and said resonant cavity.
Claim 3
Dependent Claim
26 words
The multipass optic system of claim 1 in which said second reflecting mirror is formed upon and integral with the far side of said diffraction grating.
Claim 4
Dependent Claim
21 words
The multipass optic system of claim 1 in which said partially reflecting mirror has a reflectivity in the range between 40-80%.
Claim 5
Dependent Claim
21 words
The multipass optic system of claim 1 in which said partially reflecting mirror has a reflectivity in the range between 10-90%.
Claim 6
Dependent Claim
201 words
A multipass optic system, comprising: a first reflecting mirror of substantially 100% reflectivity; a partially reflecting mirror of reflectivity in the range between 40% and 80%; a Faraday effect diffraction grating; a second reflecting mirror of substantially 100% reflectivity on the far side of said diffraction grating; said first reflecting mirror and said partially reflecting mirror forming a resonant cavity; said second reflecting mirror, said diffraction grating and said partially reflecting mirror forming an antiresonant cavity; a light beam source oriented within said resonant cavity; said partially reflecting mirror oriented for optically coupling said light beam from said resonant cavity to said antiresonant cavity; means coupling to said diffraction grating for varying the diffraction characteristics of said diffraction grating for generating from said laser light beam a 0'th order light beam and a 1'st order light beam; and said diffraction grating directing said 0'th order light beam back through said partially reflecting mirror to be passed through said laser rod source onto said first reflecting mirror and thence back through said laser rod source and said partially reflecting mirror and back onto said diffraction grating and said second reflecting mirror for generating said 1'st order light beam of an amplified intensity.
Claim 7
Dependent Claim
201 words
A multipass optic system, comprising: a first reflecting mirror of substantially 100% reflectivity; a partially reflecting mirror of reflectivity in the range between 40% and 80%; a Faraday effect diffraction grating; a second reflecting mirror of substantially 100% reflectivity on the far side of said diffraction grating; said first reflecting mirror and said partially reflecting mirror forming a resonant cavity; said second reflecting mirror, said diffraction grating and said partially reflecting mirror forming an antiresonant cavity; a light beam source oriented within said resonant cavity; said partially reflecting mirror oriented for optically coupling said light beam from said resonant cavity to said antiresonant cavity; means coupling to said diffraction grating for varying the diffraction characteristics of said diffraction grating for generating from said laser light beam a 0'th order light beam and a 1'st order light beam; and said diffraction grating directing said 0'th order light beam back through said partially reflecting mirror to be passed through said laser rod source onto said first reflecting mirror and thence back through said laser rod source and said partially reflecting mirror and back onto said diffraction grating and said second reflecting mirror for generating said 1'st order light beam of an amplified intensity.
Claim 8
Dependent Claim
26 words
The multipass optic system of claim 5 in which said second reflecting mirror is formed upon and integral with the far side of said diffraction grating.
Claim 9
Dependent Claim
183 words
A multipass optic system, comprising: a first reflecting mirror; a partially reflecting mirror; a Faraday effect diffraction grating; a second reflecting mirror; said first reflecting mirror and said partially reflecting mirror forming a resonant cavity; a light beam source included within said resonant cavity; said second reflecting mirror, said diffraction grating and said partially reflecting mirror forming an antiresonant cavity; said resonant cavity and said antiresonant cavity oriented along an optical axis; means coupled to said diffraction grating for varying the diffraction characteristics of said diffraction grating for generating from said laser light beam a single 0'th order light beam, which is directed along said optical axis, and two congruent 1'st order light beams; said diffraction grating directing said 0'th order light beam back through said partially reflecting mirror to be passed through said laser rod source onto said first reflecting mirror and thence back through said laser rod source and said first partially reflecting mirror and back onto said diffraction grating and said second reflecting mirror, all along said optical axis, for generating said 1'st order light beams of an amplified intensity.
Claim 10
Dependent Claim
183 words
A multipass optic system, comprising: a first reflecting mirror; a partially reflecting mirror; a Faraday effect diffraction grating; a second reflecting mirror; said first reflecting mirror and said partially reflecting mirror forming a resonant cavity; a light beam source included within said resonant cavity; said second reflecting mirror, said diffraction grating and said partially reflecting mirror forming an antiresonant cavity; said resonant cavity and said antiresonant cavity oriented along an optical axis; means coupled to said diffraction grating for varying the diffraction characteristics of said diffraction grating for generating from said laser light beam a single 0'th order light beam, which is directed along said optical axis, and two congruent 1'st order light beams; said diffraction grating directing said 0'th order light beam back through said partially reflecting mirror to be passed through said laser rod source onto said first reflecting mirror and thence back through said laser rod source and said first partially reflecting mirror and back onto said diffraction grating and said second reflecting mirror, all along said optical axis, for generating said 1'st order light beams of an amplified intensity.
Claim 11
Dependent Claim
26 words
The multipass optic system of claim 7 in which said second reflecting mirror is formed upon and integral with the far side of said diffraction grating.
Claim 12
Dependent Claim
20 words
The multipass optic system of claim 7 in which said transmitting mirror has a reflectivity in the range between 40-80%.
Claim 13
Dependent Claim
20 words
The multipass optic system of claim 7 in which said transmitting mirror has a reflectivity in the range between 10-90%.
Claim 14
Dependent Claim
86 words
A multipass optic system, comprising a resonant cavity; a light beam source included within said resonant cavity; an antiresonant cavity optically coupled to said resonant cavity and including means for generating from said light beam a 0'th order light beam and a 1'st order light beam; said antiresonant cavity directing said 0'th order light beam back to said resonant cavity which in turn redirects said directed 0'th order light beam back to said antiresonant cavity for generating said 1'st order light beam of an amplified intensity.
Claim 15
Dependent Claim
86 words
A multipass optic system, comprising a resonant cavity; a light beam source included within said resonant cavity; an antiresonant cavity optically coupled to said resonant cavity and including means for generating from said light beam a 0'th order light beam and a 1'st order light beam; said antiresonant cavity directing said 0'th order light beam back to said resonant cavity which in turn redirects said directed 0'th order light beam back to said antiresonant cavity for generating said 1'st order light beam of an amplified intensity.
Claim 16
Dependent Claim
24 words
The multipass optic system of claim 11 in which said resonant cavity and said antiresonant cavity are optically coupled by a partially reflecting mirror.
Claim 17
Dependent Claim
21 words
The multipass optic system of claim 12 in which said partially reflecting mirror has a reflectivity in the range between 40-80%.
Claim 18
Dependent Claim
21 words
The multipass optic system of claim 12 in which said partially reflecting mirror has a reflectivity in the range between 10-90%.
Claim 19
Dependent Claim
52 words
The multipass optic system of claim 12 in which said antiresonant cavity includes a Faraday effect diffraction grating and a reflecting mirror formed integral therewith and on the far side thereof for reflecting said light beam back through said diffraction grating and for generating said 0'th order and 1'st order light beams.
Claim 20
Dependent Claim
24 words
The multipass optic system of claim 1 in which said light beam is a coherent light beam of a wavelength in the visible spectrum.
Claim 21
Dependent Claim
20 words
The multipass optic system of claim 16 in which said light beam source and said resonant cavity form a laser.
References Cited (Backward Citations)
US3611181A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-05-03 | 1985-11-02 | 1986-05-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-05-03 | 1989-11-02 | 1990-05-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-05-03 | 1993-11-02 | 1994-05-04 | $7700.00 | Window Closed / Lapsed |