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US5300859A
Expired / Lapsed
US
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IR-radiation source and method for producing same
Assignee: Yissum Research Development Co of Hebrew University of Jerusalem
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Filing: 1991-03-19
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Granted: 1994-04-05
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Expires: 2011-03-19
Abstract
Abstract A source of IR-radiation, having an enclosure defining between its walls a sealed-off, electrode-less chamber, the walls having at least one portion transparent to IR-radiation, and the chamber containing a gas mixture of at least one, molecular, IR-active gas, of at least one buffer gas and of at least one noble gas. A method for producing a source of IR-radiation is also described and claimed.
Inventors
- 👤 Shaul Yatsiv
- 👤 Amnon Gabay
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:12
CPC Classifications
H; H01; H01J; H01J9/00; H01J9/24; H01J9/245; H01J9/247; H01J61/00; H01J61/02; H01J61/12; H01J61/14; H01J61/30; H01J61/35; H01J65/00; H01J65/04; H01J65/042
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
88 words
A source of IR-radiation comprising; an enclosure defining between its walls a sealed-off, electrode-less chamber, said walls having at least one portion transparent to IR-radiation, and said sealed-off, electrode-less chamber containing a gas mixture of at least one molecular IR-active gas, of at least one buffer gas and of at least one noble gas, said source of IR-radiation emitting discrete, solely noncoherent, spontaneous emission frequencies in the IR-spectrum characteristic of the decay of said at least one molecular IR-active gas from its rotational-vibrational state to its ground state.
Claim 2
Dependent Claim
88 words
A source of IR-radiation comprising; an enclosure defining between its walls a sealed-off, electrode-less chamber, said walls having at least one portion transparent to IR-radiation, and said sealed-off, electrode-less chamber containing a gas mixture of at least one molecular IR-active gas, of at least one buffer gas and of at least one noble gas, said source of IR-radiation emitting discrete, solely noncoherent, spontaneous emission frequencies in the IR-spectrum characteristic of the decay of said at least one molecular IR-active gas from its rotational-vibrational state to its ground state.
Claim 3
Dependent Claim
21 words
The source as claimed in claim 1 wherein said IR-active gas is selected from the group of CO 2 and CO.
Claim 4
Dependent Claim
18 words
The source as claimed in claim 1 wherein said IR-active gas molecule contains at least one rare isotope.
Claim 5
Dependent Claim
25 words
The source as claimed in claim I wherein said buffer gas is selected from the group containing N 2 , CO or a mixture thereof.
Claim 6
Dependent Claim
15 words
The source as claimed in claim 1 wherein said noble gas is He or Xe.
Claim 7
Dependent Claim
47 words
The source as claimed in claim I wherein said gas mixture, inside a given volume and configuration of said chamber, provides a total pressure at which the average random propelling time to a wall of said chamber exceeds about 5 milliseconds, for maximizing the radiation output power.
Claim 8
Dependent Claim
48 words
The source as claimed in claim 1 wherein, for a given volume and configuration of said chamber, the partial pressure of quenching gas particles inside said chamber is such that the collisional quenching rate does not exceed about 200 sec -1 , for maximizing the radiation output power.
Claim 9
Dependent Claim
32 words
The source as claimed in claim I wherein said gas mixture, inside a given volume and configuration of said chamber, is less than about 5 milliseconds for obtaining faster radiation modulation rate.
Claim 10
Dependent Claim
48 words
The source as claimed in claim 1 wherein, for a given volume and configuration of said chamber, the partial pressure of quenching gas particles inside said chamber is such that the collisional quenching rate exceed about 200 sec -1 , for obtaining a faster output radiation modulation rate.
Claim 11
Dependent Claim
34 words
The source as claimed in claim 1 wherein said enclosure is provided with two portions, a first larger portion defining a reservoir and a second portion of a smaller size, defining a discharge zone.
Claim 12
Dependent Claim
24 words
The source as claimed in claim 1 wherein said enclosure is divided into two compartments, by a partition, said partition being transparent to IR-radiation.
Claim 13
Dependent Claim
53 words
The source as claimed in claim 11 wherein a first of said two compartments is filled with said gas mixture and a second of said two compartments is filled with said gas mixture and an additional active gas molecule having a tendency for dissociation similar to that of an N 2 O molecule.
Claim 14
Dependent Claim
28 words
The source as claimed in claim 1 wherein the walls of said chamber are coated with a material which reduces the tendency of relaxing colliding excited IR-active molecules.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1997-04-04 | 1997-10-04 | 1998-04-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-04-04 | 2001-10-04 | 2002-04-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-04-04 | 2005-10-04 | 2006-04-05 | $7700.00 | Window Closed / Lapsed |