US3686940A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ultraviolet testing apparatus with selective mirrors for removing infrared radiation
Assignee: Original Hanau Quarzlampen GmbH
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Filing: 1971-03-22
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Granted: 1972-08-29
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Expires: 1991-03-22
Abstract
Abstract A water cooled tube has radial fins that extend to the surface of a surrounding cylindrical mirror that passes ultraviolet radiation and visible light while reflecting infrared radiation. Planar mirrors that reflect ultraviolet and visible light and pass infrared are disposed between the extremities of the fins to form a polygon within the cylinder. Light sources are disposed in each area between a planar mirror and the cylindrical mirror. Ultraviolet radiation and visible light are thus directly passed or reflected through the cylindrical mirror to an external test sample chamber, while infrared radiation is directly passed or reflected through the planar mirrors to the fins, which absorb the infrared radiation and conduct the heat therefrom to the cooling tube.
Inventors
- 👤 Dieter Kockott
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 01:00
CPC Classifications
G; G01; G01N; G01N17/00; G01N17/004
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
140 words
In an apparatus for exposing test samples to ultraviolet radiation and visible light from light sources that also produce unwanted infrared radiation, a selective filtering arrangement comprising: a. cylindrical means surrounding the light sources for passing ultraviolet radiation and visible light and blocking infrared radiation; b. means for passing infrared radiation and blocking ultraviolet radiation and visible light disposed within the cylindrical means and defining therein a central heat chamber; c. the light sources being disposed between the cylindrical means and the passing means; d. means for transferring heat from the infrared radiation out of the central chamber, and e. test sample exposing means exterior of the cylindrical means, whereby ultraviolet radiation and visible light is passed through the cylindrical means to the test sample exposing means while infrared radiation is passed through the passing means into the central chamber.
Claim 2
Dependent Claim
140 words
In an apparatus for exposing test samples to ultraviolet radiation and visible light from light sources that also produce unwanted infrared radiation, a selective filtering arrangement comprising: a. cylindrical means surrounding the light sources for passing ultraviolet radiation and visible light and blocking infrared radiation; b. means for passing infrared radiation and blocking ultraviolet radiation and visible light disposed within the cylindrical means and defining therein a central heat chamber; c. the light sources being disposed between the cylindrical means and the passing means; d. means for transferring heat from the infrared radiation out of the central chamber, and e. test sample exposing means exterior of the cylindrical means, whereby ultraviolet radiation and visible light is passed through the cylindrical means to the test sample exposing means while infrared radiation is passed through the passing means into the central chamber.
Claim 3
Dependent Claim
46 words
An apparatus as defined in claim 1 wherein: a. the cylindrical means is a cylindrical mirror that passes ultraviolet radiation and visible light and reflects infrared radiation, and b. the passing means are planar mirrors that pass infrared radiation and reflect ultraviolet radiation and visible light.
Claim 4
Dependent Claim
24 words
An apparatus as defined in claim 2 wherein the planar mirrors define a polygon whose vertices abut the inner surface of the cylindrical mirror.
Claim 5
Dependent Claim
29 words
An apparatus as defined in claim 3 wherein the heat transferring means comprises a fluid cooled tube having heat conducting radial fins extending to the vertices of the polygon.
Claim 6
Dependent Claim
21 words
An apparatus as defined in claim 3 wherein the test sample exposing means comprises a cylindrical chamber surrounding the cylindrical mirror.
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) | 1975-08-29 | 1976-02-28 | 1976-08-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-29 | 1980-02-28 | 1980-08-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-29 | 1984-02-28 | 1984-08-29 | $7700.00 | Window Closed / Lapsed |