US5436717A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for analyzing particles
Assignee: Sysmex Corp
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Filing: 1993-03-15
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Granted: 1995-07-25
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Expires: 2013-03-15
Abstract
Abstract An apparatus for analyzing particles capable of irradiating uniform fluorescent excitation light efficiently, without difficulty in position adjustment, to a flat sample liquid flow containing particle components such as blood and urine, and capable of measuring side fluorescence or scattered light. By irradiating a sample liquid flat flow with fluorescent excitation light by a light source from the narrower side of a sample liquid flat flow, the fluorescence emitted from the broader side of the sample liquid flat flow is detected by a photo detector, and the signals from this photo detector are entered in a signal processor to be processed.
Inventors
- 👤 Shinichi Ogino
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 02:15
CPC Classifications
G; G01; G01N; G01N15/00; G01N15/10; G01N15/14; G01N15/1404; G01N15/1434; G01N2015/144; G01N2015/1443; G01N21/00; G01N21/17; G01N21/59; G01N21/5907; G01N2021/5957; G01N21/84; G01N21/85; G01N2021/8557; G01N21/47; G01N21/49; G01N21/62; G01N21/63; G01N21/64
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
132 words
An apparatus for analyzing particles of a sample liquid, which is enveloped with a sheath liquid, wherein the flow of sample liquid is a flat flow, the apparatus comprising: a light source for irradiating the sample liquid flat flow with light; a photo detector for detecting the light emitted from the sample liquid flat flow; a signal processor for receiving and processing signals from the photo detector; and a condenser lens disposed between the sample liquid flat flow and said light source, the light from said light source passing through the condenser lens, wherein the sample liquid flat flow has a narrower side and a broader side, and wherein the light from said light source is directed to said narrower side, thereby making the light intensity distribution in a detecting region uniform.
Claim 2
Independent Claim
132 words
An apparatus for analyzing particles of a sample liquid, which is enveloped with a sheath liquid, wherein the flow of sample liquid is a flat flow, the apparatus comprising: a light source for irradiating the sample liquid flat flow with light; a photo detector for detecting the light emitted from the sample liquid flat flow; a signal processor for receiving and processing signals from the photo detector; and a condenser lens disposed between the sample liquid flat flow and said light source, the light from said light source passing through the condenser lens, wherein the sample liquid flat flow has a narrower side and a broader side, and wherein the light from said light source is directed to said narrower side, thereby making the light intensity distribution in a detecting region uniform.
Claim 3
Dependent Claim
19 words
An apparatus for analyzing particles as claimed in claim 1, wherein said photo detector is designed to detect fluorescence.
Claim 4
Dependent Claim
20 words
An apparatus for analyzing particles as claimed in claim 1, wherein said photo detector is designed to detect scattered light.
Claim 5
Dependent Claim
69 words
An apparatus for analyzing particles as claimed in claim 1, further comprising: a second light source for irradiating the sample liquid flat flow with a second light in the direction of said broader side of the sample liquid flat flow; and a one-dimensional image sensor for imaging at least one of the transmitted light images and scattered light images by the second light from the sample liquid flat flow.
Claim 6
Independent Claim
204 words
An apparatus for analyzing particles of a sample liquid, which is enveloped with a sheath liquid, wherein the flow of sample liquid is a flat flow having a narrower side and a broader side, the apparatus comprising: a light source for irradiating the sample liquid flat flow with light; a photo detector for detecting the light emitted from the sample liquid flat flow; a signal processor for receiving and processing signals from the photo detector; a second light source for irradiating the sample liquid flat flow with a second light in the direction of said broader side of the sample liquid flat flow; a one-dimensional image sensor for imaging at least one of the transmitted light images and scattered light images by the second light from the sample liquid flat flow; a third light source for irradiating the sample liquid flat flow with a pulse light in the direction of said broader side of the sample liquid flat flow; a two-dimensional image sensor for picking up the particle images by the pulse light passing through the sample liquid flat flow; and a signal processor for controlling the radiation of the third light source on the basis of a signal from the one-dimensional image sensor.
Claim 7
Independent Claim
204 words
An apparatus for analyzing particles of a sample liquid, which is enveloped with a sheath liquid, wherein the flow of sample liquid is a flat flow having a narrower side and a broader side, the apparatus comprising: a light source for irradiating the sample liquid flat flow with light; a photo detector for detecting the light emitted from the sample liquid flat flow; a signal processor for receiving and processing signals from the photo detector; a second light source for irradiating the sample liquid flat flow with a second light in the direction of said broader side of the sample liquid flat flow; a one-dimensional image sensor for imaging at least one of the transmitted light images and scattered light images by the second light from the sample liquid flat flow; a third light source for irradiating the sample liquid flat flow with a pulse light in the direction of said broader side of the sample liquid flat flow; a two-dimensional image sensor for picking up the particle images by the pulse light passing through the sample liquid flat flow; and a signal processor for controlling the radiation of the third light source on the basis of a signal from the one-dimensional image sensor.
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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) | 1998-07-24 | 1999-01-23 | 1999-07-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-07-24 | 2003-01-23 | 2003-07-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-07-24 | 2007-01-23 | 2007-07-25 | $7700.00 | Window Closed / Lapsed |