US4697925A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of measurement using scattered light
Assignee: Arkray Inc
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Filing: 1984-10-29
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Granted: 1987-10-06
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Expires: 2004-10-29
Abstract
Abstract The test solution in the measuring cell is regarded to be divided into a plurality of sections, and the quantity of scattered light from each section is continuously measured to give a plurality of independent series of signal. This measurement is carried out by scanning the measuring cell with a minute light flux periodically to obtain a plurality of measurements in a period. Out of the series of signals obtained, those containing abnormal scattered light signal are eliminated to determine accurate concentration and reaction process.
Inventors
- 👤 Hiroshi Hyodo
- 👤 Naoki Yamada
- 👤 Kenichi Iwase
- 👤 Shinichi Kishimoto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 20:33
CPC Classifications
G; G01; G01N; G01N21/00; G01N21/17; G01N21/47; G01N21/49; G01N21/51; G01N21/59; G01N21/5907; G01N2021/5969; G01N2201/00; G01N2201/08
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
131 words
A method of measurement using scattered light comprising the steps of: scanning during each one of a plurality of successive scanning times each one of a plurality of sections of a test solution in a measuring cell with a minute light flux; measuring the intensity of scattered light produced successively in each of said plurality of sections of the test solution during each successive scanning time; producing from said successive measurements over time of the intensity of light from each of said plurality of sections of the test solution, an individual curve of light intensity versus time for each of said sections; and determining either the concentration or detecting the reaction process of the test solution from the average of a combination of said individual curves of light intensity versus time.
Claim 2
Independent Claim
131 words
A method of measurement using scattered light comprising the steps of: scanning during each one of a plurality of successive scanning times each one of a plurality of sections of a test solution in a measuring cell with a minute light flux; measuring the intensity of scattered light produced successively in each of said plurality of sections of the test solution during each successive scanning time; producing from said successive measurements over time of the intensity of light from each of said plurality of sections of the test solution, an individual curve of light intensity versus time for each of said sections; and determining either the concentration or detecting the reaction process of the test solution from the average of a combination of said individual curves of light intensity versus time.
Claim 3
Dependent Claim
47 words
A method of measurement using scattered light as claimed in claim 1, wherein said light flux is irradiated on the measuring cell while continuously moving, and the intensity of scattered light is measured at regular time intervals as the intensity of scattered light from one such section.
Claim 4
Dependent Claim
95 words
A method of measurement using scattered light as claimed in claim 2, wherein the light from a light source is formed into a spot-like or narrow belt-like light flux and made to scan periodically a certain range of the measuring cell from the side, the output signals from a light detector positioned either above or under the measuring cell for measuring the intensity of scattered light are processed periodically from a datum point of time at certain time intervals in a specified number, and the received output signals are stored with time for every section.
Claim 5
Dependent Claim
39 words
A method of measurement using scattered light as claimed in claim 3, wherein said scanning of light flux is effected by either a spot-like or narrow band-like light flux reflected by a rotary mirror revolved in a certain range.
Claim 6
Dependent Claim
49 words
A method of measurement using scattered light as claimed in claim 3, wherein said scanning of light flux is effected by passing the light from the light source through either a small hole or a slit in a rotary plate or separating board rotated or move up and down.
Claim 7
Dependent Claim
49 words
A method of measurement using scattered light as claimed in claim 1, wherein said light flux is irradiated on each section of the measuring cell while moving stepwise and the intensity of scattered light in each section is measured in synchronism with the stepwise movement of the light flux.
Claim 8
Dependent Claim
74 words
A method of measurement using scattered light as claimed in claim 6, wherein a plurality of either spot-like or narrow belt-like irradiation sources arranged longitudinally on the side of the measuring cell is actuated orderly in one direction from a certain one, output signals from the light detector arranged above or under the cell for measuring scattered light intensity are successively processed, and the output signals are stored with time for every irradiation source.
Claim 9
Dependent Claim
35 words
A method of measurement using scattered light as claimed in claim 7, wherein said irradiation sources are independent from each other and the application of a power source to each irradiation source is selectively controlled.
Claim 10
Dependent Claim
57 words
A method of measurement using scattered light as claimed in claim 7, wherein said irradiation sources comprise the ends of optical fiber bundles which lead the light from the light source to respective positions, and the light is led to each end of optical fiber bundle through a slit in a rotary plate which is selectively rotated.
Claim 11
Dependent Claim
60 words
A method of measurement using scattered light as claimed in claim 1, wherein series of signals which contain abnormal light signals in a time zone which affects the measurement are removed from a plurality of series of signals, and the remaining normal signal series are used for either measuring the concentration or detecting the reaction process in the test solution.
Claim 12
Dependent Claim
40 words
A method of measurement using scattered light as claimed in claim 10, wherein either the concentration of the test substance or reaction process in the test solution is determined based on the average value of the series of normal signals.
Claim 13
Dependent Claim
43 words
A method of measurement using scattered light as claimed in claim 10, wherein either the concentration of the test substance or reaction process in the test solution is determined based on the average value of the series of normal signals excluding on series.
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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) | 1990-10-05 | 1991-04-06 | 1991-10-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-10-05 | 1995-04-06 | 1995-10-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-10-05 | 1999-04-06 | 1999-10-06 | $7700.00 | Window Closed / Lapsed |