Patent US3654482A successfully refreshed from Google Patents.
US3654482A
Expired / Lapsed
US
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Mirrorless optical cavity
Assignee: United States Department of the Navy
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Filing: 1971-03-12
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Granted: 1972-04-04
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Expires: 1991-03-12
Abstract
Abstract This disclosure is directed to an optical parametric oscillator operable in the visible and made of components which are not damaged by high power laser radiation or environmental effects.
Inventors
- 👤 Gail A Massey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 18:11
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/35; G02F1/39
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
73 words
A cavity for forming a parametric oscillator which comprises; a nonlinear-crystal, said non-linear crystal including a porro-prism end and a Brewster-angle end, a birefringent minimum deviation prism positioned adjacent to said Brewster angle end of said nonlinear crystal for receiving pump radiation on one surface thereof, and a Brewster-Porro prism in optical alignment with said nonlinear crystal and said birefringent minimum deviation prism to receive light refracted by said birefringent minimum deviation prism.
Claim 2
Dependent Claim
73 words
A cavity for forming a parametric oscillator which comprises; a nonlinear-crystal, said non-linear crystal including a porro-prism end and a Brewster-angle end, a birefringent minimum deviation prism positioned adjacent to said Brewster angle end of said nonlinear crystal for receiving pump radiation on one surface thereof, and a Brewster-Porro prism in optical alignment with said nonlinear crystal and said birefringent minimum deviation prism to receive light refracted by said birefringent minimum deviation prism.
Claim 3
Dependent Claim
46 words
A cavity is claimed in claim 1, wherein; said nonlinear crystal is aligned such that the optic axis is parallel with the optic axis of said birefringent minimum deviation prism and the X and Y axis are 45* from the direction of propagation of the light.
Claim 4
Dependent Claim
40 words
A cavity as claimed in claim 2, wherein; said Brewster-Porro prism is slightly rotated away from its Brewster angle orientation in the optical path whereby a light beam may be coupled out at the refracting surface of said Brewster-Porro prism.
Claim 5
Dependent Claim
17 words
A cavity as claimed in claim 3, wherein; said birefringent minimum deviation prism is made of calcite.
Claim 6
Dependent Claim
26 words
A cavity as claimed in claim 4, wherein; said calcite prism provides a means of coupling pump light into and out of said parametric oscillator cavity.
References Cited (Backward Citations)
US3602724A
Cited
US3577093A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-04-04 | 1975-10-04 | 1976-04-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-04-04 | 1979-10-04 | 1980-04-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-04-04 | 1983-10-04 | 1984-04-04 | $7700.00 | Window Closed / Lapsed |