US3628178A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Diffractive coupling laser mirror
Assignee: RTX Corp
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Filing: 1968-08-14
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Granted: 1971-12-14
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Expires: 1988-08-14
Abstract
Abstract A diffracting coupling mirror is designed to operate with an area less than the dimension of a dominant mode of a laser, thus providing an apodized beam of high resolution and eliminating the need for conventional output coupling; a cooled embodiment as well as circular, cylindrical and annular embodiments are disclosed.
Inventors
- 👤 Edmond B Treacy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 07:57
CPC Classifications
H; H01; H01S; H01S3/00; H01S3/02; H01S3/03; H01S3/034; H01S3/04; H01S3/0401; H01S3/0407
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
133 words
A laser comprising: an annular concave mirror surrounding a lasing medium, said mirror having a radius of curvature of concavity which is greater than its annular diameter, said mirror having a dimension transverse to the major circular plane thereof which is less than the dimension of the dominant mode of radiation at the point of interference with said mirror, said mirror thereby comprising a diffractive coupling mirror exhibiting the property of allowing diffractive spillover around the edges thereof; and a truncated, substantially conical mirror having its major circular plane parallel with the major circular plane of said concave mirror, said conical mirror reflecting two radial planes of spillover radiation so as to provide two cylinders of spillover radiation, thereby to provide a beam of high resolution in the far field of said laser.
Claim 2
Dependent Claim
133 words
A laser comprising: an annular concave mirror surrounding a lasing medium, said mirror having a radius of curvature of concavity which is greater than its annular diameter, said mirror having a dimension transverse to the major circular plane thereof which is less than the dimension of the dominant mode of radiation at the point of interference with said mirror, said mirror thereby comprising a diffractive coupling mirror exhibiting the property of allowing diffractive spillover around the edges thereof; and a truncated, substantially conical mirror having its major circular plane parallel with the major circular plane of said concave mirror, said conical mirror reflecting two radial planes of spillover radiation so as to provide two cylinders of spillover radiation, thereby to provide a beam of high resolution in the far field of said laser.
References Cited (Backward Citations)
US3247467A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-12-13 | 1975-06-14 | 1975-12-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-12-13 | 1979-06-14 | 1979-12-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-12-13 | 1983-06-14 | 1983-12-14 | $7700.00 | Window Closed / Lapsed |