US3577069A
Expired / Lapsed
US
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Optical resonance cells containing an alloy of an alkali metal with another metal
Assignee: Thales SA
•
Filing: 1969-02-03
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Granted: 1971-05-04
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Expires: 1989-02-03
Abstract
Abstract An optical resonance cell containing an alkali vapor to be optically pumped and comprising a bulb communicating with the cell. An alloy of the alkali metal with another metal is placed in the bulb. This metal is so selected that the atoms of its vapor produce a disturbance as small as possible of the spin function of the alkali atoms, by spin exchange collisions.
Inventors
- 👤 Leon Malnar
- 👤 Henri Brun
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 10:18
CPC Classifications
H; H01; H01J; H01J65/00; H01J65/04; H01J65/042; H01J65/048; G; G04; G04F; G04F5/00; G04F5/14
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
19 words
A cell as claimed in claim 1, wherein said alloy is disposed in a bulb communicating with said enclosure.
Claim 2
Dependent Claim
22 words
A cell as claimed in claim 2, wherein said other metal is a metal having a resultant electron spin equal to zero.
Claim 3
Dependent Claim
13 words
A cell as claimed in claim 3, wherein said other metal is mercury.
Claim 4
Dependent Claim
70 words
A cell as claimed in claim 2, wherein said other metal is selected for the product of its vapor pressure and its effective cross section of spin exchange collision with respect to the atoms of said alkali metal to be lower than the product of the vapor pressure of said alkali metal and the effective cross section of spin exchange collision of said alkali atoms with respect to one another.
Claim 5
Dependent Claim
13 words
A cell as claimed in claim 5, wherein said other metal is gold.
Claim 6
Dependent Claim
34 words
A cell as claimed in claim 5, wherein said other metal is selected according to the relationship where rA and rM are the atomic radii respectively of said alkali atoms and said other metal.
Claim 7
Dependent Claim
15 words
A cell as claimed in claim 7, wherein said other metal is another alkali metal.
Claim 8
Dependent Claim
19 words
A cell as claimed in claim 8, wherein said alkali metal is rubidium and said other metal is potassium.
Claim 9
Dependent Claim
22 words
A cell as claimed in claim 1, wherein said enclosure contains a buffer gas and said alloy is disposed in said enclosure.
Claim 10
Dependent Claim
34 words
A cell as claimed in claim 2, wherein said other metal is selected according to the relationship where rA and rM are the atomic radii respectively of said alkali atoms and said other metal.
References Cited (Backward Citations)
US3422344A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-05-03 | 1974-11-02 | 1975-05-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-03 | 1978-11-02 | 1979-05-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-03 | 1982-11-02 | 1983-05-04 | $7700.00 | Window Closed / Lapsed |