Patent US3885415A successfully refreshed from Google Patents.
US3885415A
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Calibration of particle velocity measuring instrument
Assignee: Artek Systems Corp
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Filing: 1973-10-19
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Granted: 1975-05-27
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Expires: 1993-10-19
Abstract
Abstract In an analytical apparatus for analysis of particulate motion in a flow cell, there is provided, for calibration of the analytical apparatus, a movable and preferably rotatable calibration disc generally disposed within the optical viewing path of the analytical system devoted to calculating particle related information. Appropriately located upon the surface of the disc is a predetermined number of contrast regions representing particles. The disc is rotated at a given rate within the optical viewing path and simulates predetermined particle movement for use in calibration of analytical devices for obtaining particle information.
Inventors
- 👤 Richard H Burns
- 👤 Roger E Button
- 👤 Alexander E Martens
- 👤 Roger R Morton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 09:07
CPC Classifications
G; G01; G01P; G01P21/00; G01P21/02; G01P21/025
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
124 words
A calibration apparatus for calibrating a particle velocity measuring instrument defining an optical path for optically viewing particulate matter to generate signals as a function of the velocity of the particulate matter, comprising: a disc disposed for receiving light emanating from along the defined optical path; areas of contrast disposed upon the disc for receiving the light emanating from along the optical path to be optically viewed by the particle velocity measuring instrument; and means for moving the areas of contrast disposed upon the disc at a predetermined rate across the received light emanating from along the optical path for the generation of calibration signals as a function of the velocity of the areas of contrast traversing the received light at a predetermined rate.
Claim 2
Dependent Claim
124 words
A calibration apparatus for calibrating a particle velocity measuring instrument defining an optical path for optically viewing particulate matter to generate signals as a function of the velocity of the particulate matter, comprising: a disc disposed for receiving light emanating from along the defined optical path; areas of contrast disposed upon the disc for receiving the light emanating from along the optical path to be optically viewed by the particle velocity measuring instrument; and means for moving the areas of contrast disposed upon the disc at a predetermined rate across the received light emanating from along the optical path for the generation of calibration signals as a function of the velocity of the areas of contrast traversing the received light at a predetermined rate.
Claim 3
Dependent Claim
29 words
The calibration apparatus as defined in claim 1, wherein the areas of contrast upon the disc are disposed for traversing the optical path defined by the velocity measuring instrument.
Claim 4
Dependent Claim
52 words
The calibration apparatus as defined in claim 1, including means for passing light emanating from along the defined optical path to the disc and the areas of contrast disposed upon the disc where the disc and the areas of contrast are disposed outside the optical path defined by the velocity measuring instrument.
Claim 5
Dependent Claim
34 words
The calibration apparatus as defined in claim 3, wherein the means for passing light emanating from along the defined optical path is a beam splitter disposed for receiving light along the defined optical path.
Claim 6
Dependent Claim
37 words
The calibration apparatus as defined in claim 1, wherein the disc is substantially flat and has disposed on one of its surfaces, areas of contrast which have optical properties differing from the optical properties of the disc.
Claim 7
Dependent Claim
25 words
The calibration apparatus as defined in claim 1, wherein the disc is translucent and the areas of contrast disposed upon the disc aRe substantially opaque.
Claim 8
Dependent Claim
148 words
A particle velocity measuring instrument, comprising: viewing means for optically viewing particulate matter in a field of view to form images thereof; scanning means for periodically scanning the formed images of the particulate matter to generate video signals as a function of the movement of the images between respective fields of view; electronic means receiving the video signals for generating a velocity related signal as a function of the movement of the particulate matter between respective fields of view; and a calibration disc having areas of contrast, further including means for rotating the areas of contrast at a predetermined rate for the viewing means to form images thereof in a field of view for scanning of the images of the areas of contrast by the scanning means for the electronic means to generate calibration signals as a function of the predetermined rate of rotation of the calibration disc.
Claim 9
Dependent Claim
148 words
A particle velocity measuring instrument, comprising: viewing means for optically viewing particulate matter in a field of view to form images thereof; scanning means for periodically scanning the formed images of the particulate matter to generate video signals as a function of the movement of the images between respective fields of view; electronic means receiving the video signals for generating a velocity related signal as a function of the movement of the particulate matter between respective fields of view; and a calibration disc having areas of contrast, further including means for rotating the areas of contrast at a predetermined rate for the viewing means to form images thereof in a field of view for scanning of the images of the areas of contrast by the scanning means for the electronic means to generate calibration signals as a function of the predetermined rate of rotation of the calibration disc.
Claim 10
Independent Claim
237 words
A method of generating calibration signals for calibrating a particle velocity measuring instrument adapted for analytical study of particulate matter where the instrument has a viewing system for optically viewing particulate matter and a scanning system to scan formed images of the particulate matter and a signal generator for generating signals as a function of particulate matter movement detected during scanning over a period of time, comprising the steps of: providing a beam of light to define an optical path of the viewing system; providing a disc; providing areas of contrast to move in cooperation with the disc; disposing the areas of contrast in cooperation with the disc to intersect light emanating from the optical path of the viewing system; moving the disc at a predetermined rate for the areas of contrast to traverse the light emanating from the optical path to modulate the intensity of the light received by the viewing system; forming images of the moving areas of contrast as a function of the modulated light received by the viewing system; scanning the formed images of the areas of contrast over a period of time to generate video signals as a function of the movement of the scanned images and corresponding areas of contrast; and generating calibration signals as a function of the video signals and the velocity of the areas of contrast traversing, at a predetermined rate, the light emanating from the optical path.
Claim 11
Independent Claim
237 words
A method of generating calibration signals for calibrating a particle velocity measuring instrument adapted for analytical study of particulate matter where the instrument has a viewing system for optically viewing particulate matter and a scanning system to scan formed images of the particulate matter and a signal generator for generating signals as a function of particulate matter movement detected during scanning over a period of time, comprising the steps of: providing a beam of light to define an optical path of the viewing system; providing a disc; providing areas of contrast to move in cooperation with the disc; disposing the areas of contrast in cooperation with the disc to intersect light emanating from the optical path of the viewing system; moving the disc at a predetermined rate for the areas of contrast to traverse the light emanating from the optical path to modulate the intensity of the light received by the viewing system; forming images of the moving areas of contrast as a function of the modulated light received by the viewing system; scanning the formed images of the areas of contrast over a period of time to generate video signals as a function of the movement of the scanned images and corresponding areas of contrast; and generating calibration signals as a function of the video signals and the velocity of the areas of contrast traversing, at a predetermined rate, the light emanating from the optical path.
Claim 12
Dependent Claim
32 words
The method of generating calibration signals as defined in claim 8, wherein the step of providing the areas of contrast includes disposing the areas of contrast upon a surface of the disc.
Claim 13
Dependent Claim
60 words
The method of generating calibration signals as defined in claim 9, wherein disposing the areas of contrast upon the surface of the disc includes varying the optical properties of the areas of contrast to provide optically evident differentiation between the areas of contrast and the disc for the formation of images of the areas of contrast by the viewing system.
Claim 14
Dependent Claim
111 words
The method of generating calibration signals as defined in claim 8, wherein the step of disposing the areas of contrast in cooperation with the disc to intersect light emanating from the optical path of the viewing system includes disposing the areas of contrast in cooperation with the disc outside of the optical path of the viewing system and further including the step of passing light emanating from the optical path of the viewing system to the areas of contrast for the formation of images of the moving areas of contrast by the viewing system for the generation of calibration signals as a function of the velocity of the areas of contrast.
References Cited (Backward Citations)
US3127464A
Cited
US3517308A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-05-26 | 1978-11-25 | 1979-05-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-05-26 | 1982-11-25 | 1983-05-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-05-26 | 1986-11-25 | 1987-05-27 | $7700.00 | Window Closed / Lapsed |