US4351611A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Monitoring of a detection zone utilizing zero order radiation from a concave reflecting grating
Assignee: Coulter Electronics Inc
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Filing: 1980-09-22
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Granted: 1982-09-28
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Expires: 2000-09-22
Abstract
Abstract Disclosed is an optical flow system wherein individual particles, which are sequentially suspended in a fluid flow, are irradiated at a detection zone with an excitation source to generate radiation signals, which in turn are dispersed by a concave reflection grating for subsequent detection and measurement. The radiation signals which are not dispersed from the grating but are reflected from the grating, are further reflected by a conjugate mirror to form a projected image of the detection zone suitable for viewing with a screen or eyepiece.
Inventors
- 👤 Robert C. Leif
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 20:22
CPC Classifications
G; G01; G01N; G01N15/00; G01N15/10; G01N15/14; G01N15/1434; G01N15/1456; G01N15/1459
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
145 words
An optical flow system, wherein means are provided for measuring radiation signals generated when particles, which are suspended in a fluid flow, are irradiated in a detection zone, said flow system having a concave reflecting grating disposed to intercept the radiation signals and disperse the radiation signals into a spectrum, said concave reflecting grating substantially having a line focus for "zero order" reflected radiation, the improvement of the flow system comprising: monitoring means, disposed to receive the reflected radiation from the grating, for observing the detection zone; said monitoring means including a reflector, the line focus of the grating being disposed between the grating and said reflector, said reflector having a concave surface oriented to receive the reflected radiation from the grating; said monitoring means includes observation means, disposed to receive the reflected radiation from said reflector, for observing an image of the detection zone.
Claim 2
Dependent Claim
145 words
An optical flow system, wherein means are provided for measuring radiation signals generated when particles, which are suspended in a fluid flow, are irradiated in a detection zone, said flow system having a concave reflecting grating disposed to intercept the radiation signals and disperse the radiation signals into a spectrum, said concave reflecting grating substantially having a line focus for "zero order" reflected radiation, the improvement of the flow system comprising: monitoring means, disposed to receive the reflected radiation from the grating, for observing the detection zone; said monitoring means including a reflector, the line focus of the grating being disposed between the grating and said reflector, said reflector having a concave surface oriented to receive the reflected radiation from the grating; said monitoring means includes observation means, disposed to receive the reflected radiation from said reflector, for observing an image of the detection zone.
Claim 3
Dependent Claim
15 words
The optical flow system according to claim 1 wherein said observation means includes a screen.
Claim 4
Dependent Claim
15 words
The optical flow system according to claim 1 wherein said observation means includes an eyepiece.
References Cited (Backward Citations)
US3493303A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-09-27 | 1986-03-29 | 1986-09-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-09-27 | 1990-03-29 | 1990-09-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-09-27 | 1994-03-29 | 1994-09-28 | $7700.00 | Window Closed / Lapsed |