US3784929A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermally-controlled crystalline lasers
Assignee: RCA Corp
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Filing: 1972-10-30
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Granted: 1974-01-08
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Expires: 1992-10-30
Abstract
Abstract The use of a crystalline laser element itself as the evaporator of a heat-pipe is achieved by fluting a surface of the element with capillary grooves for the heat-pipe working fluid. This maintains the surface at a substantially uniform temperature.
Inventors
- 👤 P Joy
- 👤 D Herzog
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 14:37
CPC Classifications
H; H01; H01S; H01S3/00; H01S3/09; H01S3/091; H01S3/0915; H01S3/092; H01S3/093; H01S3/02; H01S3/04; H01S3/042
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
92 words
A thermally-controlled crystalline laser comprising a heat pipe having a sealed envelope containing a working fluid and including an evaporator portion and a condensor portion, said evaporator portion incorporating a given surface of a crystalline laser element, said given surface being formed with first capillary means therein, and said condensor portion incorporating second capillary means coupled to said first capillary means, whereby heat generated by said laser during operation is removed from said element and said given surface of said element is maintained At a given temperature determined by said working fluid.
Claim 2
Dependent Claim
92 words
A thermally-controlled crystalline laser comprising a heat pipe having a sealed envelope containing a working fluid and including an evaporator portion and a condensor portion, said evaporator portion incorporating a given surface of a crystalline laser element, said given surface being formed with first capillary means therein, and said condensor portion incorporating second capillary means coupled to said first capillary means, whereby heat generated by said laser during operation is removed from said element and said given surface of said element is maintained At a given temperature determined by said working fluid.
Claim 3
Dependent Claim
48 words
The laser defined in claim 1, wherein said laser element is a cylindrical rod having its cylindrical surface fluted with a plurality of capillary-sized grooves for said working fluid extending from one end thereof toward the other end thereof, whereby said fluted cylindrical surface constitutes said given surface.
Claim 4
Dependent Claim
33 words
The laser defined in claim 2, wherein said grooves are oriented substantially parallel to the cylindrical axis of said rod and extend the entire length between said one end and said other end.
Claim 5
Dependent Claim
23 words
The laser defined in claim 2, wherein the cross sectional dimensions of each of said grooves is in the order of ten mils.
Claim 6
Dependent Claim
47 words
The laser defined in claim 2, wherein said condensor portion includes a disc-wick permeated with said working fluid, said disc-wick being attached to said rod solely at said one end thereof and having a cross section substantially larger than but substantially parallel to that of said rod.
Claim 7
Dependent Claim
15 words
The laser defined in claim 5, further including a heat sink coupled to said disc-wick.
Claim 8
Dependent Claim
33 words
The laser defined in claim 5, wherein said enclosure means includes a transparent portion for permitting pumping illumination originating outside of said region of space to enter thereon and pump said laser rod.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-01-07 | 1977-07-09 | 1978-01-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-07 | 1981-07-09 | 1982-01-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-07 | 1985-07-09 | 1986-01-08 | $7700.00 | Window Closed / Lapsed |