US3829694A
Expired / Lapsed
US
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An apparatus for detecting gases or corpuscles by light absorption and scattering
Assignee: Toshiba Corp
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Filing: 1973-03-30
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Granted: 1974-08-13
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Expires: 1993-03-30
Abstract
Abstract Apparatus for detecting gases or corpuscles is provided with means for transmitting pulse light which is to be absorbed resonantly by gases or corpuscles; means for obtaining an output signal according to the amount of Mie scattering beams of said transmitting pulse light from said gases or corpuscles; and means for detecting from said output signal the amount of resonance absorption involved during a predetermined time period after the transmission of said pulse light.
Inventors
- 👤 K Goto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 06:10
CPC Classifications
G; G01; G01N; G01N21/00; G01N21/17; G01N21/25; G01N21/31; G01N21/35; G01N21/3504
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
209 words
An apparatus for detecting gases or corpuscles comprising: an oscillator for oscillating a laser pulse light; means for transmitting the laser pulse light into the atmosphere; means for varying the wavelength of the transmitting pulse light; a photoelectric convertor for receiving part of the transmitted laser light at the time of transmitting said laser pulse light to produce a first photoelectrically converted output; a phototelectric convertor for receiving scattering beams from the atmosphere to produce a second photoelectrically converted output; a delay circuit for delaying the first photoelectrically converted output to produce a first trigger pulse at a first time; a sampling position setting circuit for controlling the first time; a delay circuit for further delaying the first trigger pulse to produce a second trigger pulse at a second time; a distance resolution setter for controlling the second time; a sampling unit for deriving from the second photoelectrically converted output a first sampling output corresponding to the first time using the first trigger pulse supplied; a sampling unit for deriving from the photoelectrically converted output a second sampling output corresponding to the second time using the second trigger pulse supplied; and a device for taking out an output difference between the first sampling output and the second sampling output.
Claim 2
Independent Claim
209 words
An apparatus for detecting gases or corpuscles comprising: an oscillator for oscillating a laser pulse light; means for transmitting the laser pulse light into the atmosphere; means for varying the wavelength of the transmitting pulse light; a photoelectric convertor for receiving part of the transmitted laser light at the time of transmitting said laser pulse light to produce a first photoelectrically converted output; a phototelectric convertor for receiving scattering beams from the atmosphere to produce a second photoelectrically converted output; a delay circuit for delaying the first photoelectrically converted output to produce a first trigger pulse at a first time; a sampling position setting circuit for controlling the first time; a delay circuit for further delaying the first trigger pulse to produce a second trigger pulse at a second time; a distance resolution setter for controlling the second time; a sampling unit for deriving from the second photoelectrically converted output a first sampling output corresponding to the first time using the first trigger pulse supplied; a sampling unit for deriving from the photoelectrically converted output a second sampling output corresponding to the second time using the second trigger pulse supplied; and a device for taking out an output difference between the first sampling output and the second sampling output.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-08-12 | 1978-02-11 | 1978-08-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-08-12 | 1982-02-11 | 1982-08-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-08-12 | 1986-02-11 | 1986-08-13 | $7700.00 | Window Closed / Lapsed |