Patent US3920336A successfully refreshed from Google Patents.
US3920336A
Expired / Lapsed
US
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System for intensification of weak absorption and collection of weak light emission
Assignee: United States Department of the Air Force
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Filing: 1974-05-21
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Granted: 1975-11-18
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Expires: 1994-05-21
Abstract
Abstract A system for intensifying weak absorption and allowing the measurement of weak light emission in materials including a source of light, and a material-containing cavity having a highly reflective coating on its diffusely-reflecting inner surface. The cavity has an entry port for light and a port for a detecting instrument which is connected to an appropriate analysis or display system.
Inventors
- 👤 Philip B Sackett
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:25
CPC Classifications
G; G01; G01N; G01N21/00; G01N21/01; G01N21/03; G01N21/0303; G01N21/62; G01N21/63; G01N21/64; G01N21/645; G01N2201/00; G01N2201/06; G01N2201/065
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
125 words
A system for monitoring and intensifying weak absorption and for collecting and studying weak light-emission comprising: a source of light; a cavity having its internal surface highly reflective; means for introducing and maintaining a material sample within the cavity; means for directing light into the cavity; means for introducing light into the cavity; means for removing light from the cavity, said means lying on an axis other than the light entrance axis; means associated with the cavity for filtering light exiting from the cavity; means for detecting light exiting the cavity; amplifier means connected to the means for detecting, and analysis means having a display connected to the amplifier means for providing an indication of the intensity of the absorption or emission within the cavity.
Claim 2
Independent Claim
125 words
A system for monitoring and intensifying weak absorption and for collecting and studying weak light-emission comprising: a source of light; a cavity having its internal surface highly reflective; means for introducing and maintaining a material sample within the cavity; means for directing light into the cavity; means for introducing light into the cavity; means for removing light from the cavity, said means lying on an axis other than the light entrance axis; means associated with the cavity for filtering light exiting from the cavity; means for detecting light exiting the cavity; amplifier means connected to the means for detecting, and analysis means having a display connected to the amplifier means for providing an indication of the intensity of the absorption or emission within the cavity.
Claim 3
Dependent Claim
28 words
A system for monitoring and intensifying weak absorption and for studying and collecting weak light emission according to claim 1 where said cavity internal surface is diffusely reflective.
Claim 4
Dependent Claim
64 words
A system for monitoring and intensifying weak absorption and for studying and collecting weak light emission according to claim 2 wherein said means for introducing light into and for removing light from the cavity are provided respectively by a light inlet port in the wall of the cavity and an exit port separated from the light inlet port in the wall of the cavity.
Claim 5
Dependent Claim
25 words
A system for monitoring and intensifying weak absorption and for collecting and studying weak light emission according to claim 3 wherein said cavity is spherical.
Claim 6
Dependent Claim
26 words
A system for monitoring and intensifying weak absorption and for collecting and studying weak light according to claim 4 wherein said cavity is constructed of glass.
Claim 7
Dependent Claim
35 words
A system for monitoring and intensifying weak absorption and for collecting and studying weak light emission according to claim 5 wherein the said diffuse reflection of said cavity is provided by a dimpled interior surface.
Claim 8
Dependent Claim
38 words
A system for monitoring and intensifying weak absorption and for collecting and studying weak light emission according to claim 6 wherein the said high reflectivity of said cavity is provided by a gold coating on the interior surface.
Claim 9
Dependent Claim
32 words
A system for monitoring and intensifying weak absorption and for collecting and studying weak light emission according to claim 7 wherein said inlet and exit ports are provided with sealed sapphire windows.
Claim 10
Dependent Claim
47 words
A system for monitoring and intensifying weak absorption and for collecting and studying weak light emission according to claim 2 wherein said means for introducing light into and for removing light from the cavity is provided by a single inlet-exit port in the wall of the cavity.
Claim 11
Dependent Claim
35 words
A system for monitoring and intensifying weak absorption and for collecting and studying weak light emission according to claim 9 wherein the said diffuse reflection of said cavity is provided by a dimpled interior surface.
Claim 12
Dependent Claim
38 words
A system for monitoring and intensifying weak absorption and for collecting and studying weak light emission according to claim 10 wherein the said high reflectivity of said cavity is provided by a gold coating on the interior surface.
Claim 13
Dependent Claim
31 words
A system for monitoring and intensifying weak absorption and for collecting and studying weak light emission according to claim 11 wherein said inlet-exit port is provided with a sealed sapphire window.
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) | 1978-11-17 | 1979-05-19 | 1979-11-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-11-17 | 1983-05-19 | 1983-11-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-11-17 | 1987-05-19 | 1987-11-18 | $7700.00 | Window Closed / Lapsed |