US3766489A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Optical device, such as a dye laser, employing a free-flowing liquid stream
Assignee: AT&T Inc
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Filing: 1972-02-07
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Granted: 1973-10-16
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Expires: 1992-02-07
Abstract
Abstract There is disclosed a dye laser employing a free-falling stream of dye solution so that no laterally constricting transparent cell is needed. The solution is pumped through a nozzle shaped to provide a smooth-surfaced central portion in a ribbon-shaped flow. The shape in the output plane of the nozzle primarily determines this flow. In a typical embodiment, the solution employs a viscous solvent such as ethylene glycol to promote a smooth-surfaced flow. The solution is filtered to eliminate bubbles and particles and is recirculated.
Inventors
- 👤 R Rosenberg
- 👤 P Runge
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 00:48
CPC Classifications
H; H01; H01S; H01S3/00; H01S3/02; H01S3/022
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
45 words
A coherent optical device according to claim 1 in which the nozzle has a transition from the constant cross-sectional area passageway to the free flow region that is characterized by essentially a stepwise reduction in cross-sectionaL area and negligible length along the liquid flow path.
Claim 2
Dependent Claim
36 words
A coherent optical device according to claim 1 in which the circulating means includes, between the pumping means and the nozzle, means for filtering particles and bubbles from the liquid before it passes through said nozzle.
Claim 3
Dependent Claim
21 words
A coherent optical device according to claim 1 in which the viscosity of the liquid is of the order of 20.
Claim 4
Dependent Claim
155 words
A coherent optical device comprising a liquid selected for disposition in the optical path of said device, means for circulating said liquid through a flow path including a section in which the liquid flows free of contact forces, including a nozzle having a passageway of substantially constant cross-sectional area, a substantially turbulence-free and bubble-free transiton from said constant cross-sectional area passagway to said free-flow section, and having an exit of elongated cross-section at said free-flow section to produce an essentially ribbon-shaped flow of said liquid in said section, and means for supplying coherent optical radiation through a central portion of said ribbon-shaped flow, the liquid being a solution of a dye capable of absorbing a portion of the supplied radiation, the supplying means supplying linearly polarized radiation, and the nozzle being oriented to dispose the smooth surfaces of the ribbon-shaped flow at Brewster''s angle with respect to the direction of propagation of the polarized radiation.
References Cited (Backward Citations)
US2535181A
Cited
US3691391A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-10-15 | 1977-04-16 | 1977-10-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-15 | 1981-04-16 | 1981-10-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-15 | 1985-04-16 | 1985-10-16 | $7700.00 | Window Closed / Lapsed |