US3619063A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Spectrometer for the far infrared
Assignee: Centre National de la Recherche Scientifique
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Filing: 1968-09-24
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Granted: 1971-11-09
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Expires: 1988-09-24
Abstract
Abstract The spectrometer comprises a Michelson interferometer, recording means, reading means and a wave analyzer. The recording means produce on a support an area of aspect different from the aspect of the support, this area having a contour which reproduces the interferogram supplied by the interferometer. The reading means deliver, for each reading of the support, a signal representative of the transverse dimension of a part of the area whose variations reproduce the variations of the interferogram.
Inventors
- 👤 Armand Hadni
- 👤 Robert Thomas
- 👤 Jacques Weber
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 02:41
CPC Classifications
G; G01; G01J; G01J3/00; G01J3/28; G01J3/45; G01J3/453
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
121 words
A spectrometer according to claim 1, wherein said reading means comprises a closed casing containing a photoelectric cell and provided on one of its faces with a slot, said casing being disposed so that its slot is very near to the peripheral surface of said rotary drum and so that its slot is parallel to the axis of rotation of said drum, and lighting means for lighting said part of said band when it passes in front of said slot, so that said photoelectric cell measures the quantity of light which is reflected by said band and whose variations reproduce the variations of the dimension of said modified area in a direction parallel to the axis of rotation of said drum.
Claim 2
Dependent Claim
75 words
A spectrometer according to claim 2, wherein the totality of said band which has come from said recorder is disposed on said rotary drum, and two reading members are provided for measuring respectively the dimensions of the modified areas which are disposed on the two parts of said band separated by said line, the signal supplied by said reading means being formed by the difference between the measurements effected by each of said reading members.
Claim 3
Dependent Claim
15 words
A spectrometer according to claim 1, wherein said recording means additionally comprise a pen-type recorder.
Claim 4
Dependent Claim
37 words
A spectrometer according to claim 1, wherein said means for adding the periodic signal to the interferogram comprise a sawtooth voltage generator connected in series between the output of said interferometer and the input of said recorder.
Claim 5
Dependent Claim
47 words
A spectrometer according to claim 1, wherein said reading means operates by transmission of the light through said surface which has come from said recorder, a source of light and a detector of light being respectively placed facing each other but on opposite sides of said surface.
References Cited (Backward Citations)
US2493534A
Cited
US3023664A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-11-08 | 1975-05-10 | 1975-11-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-08 | 1979-05-10 | 1979-11-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-08 | 1983-05-10 | 1983-11-09 | $7700.00 | Window Closed / Lapsed |