GB1281599A - Feedback controlled photosensitive object detecting system - Google Patents

Feedback controlled photosensitive object detecting system

Info

Publication number
GB1281599A
GB1281599A GB49564/69A GB4956469A GB1281599A GB 1281599 A GB1281599 A GB 1281599A GB 49564/69 A GB49564/69 A GB 49564/69A GB 4956469 A GB4956469 A GB 4956469A GB 1281599 A GB1281599 A GB 1281599A
Authority
GB
United Kingdom
Prior art keywords
detector
amplifier
detector output
oct
responsive
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB49564/69A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Corning Glass Works
Original Assignee
Corning Glass Works
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Corning Glass Works filed Critical Corning Glass Works
Publication of GB1281599A publication Critical patent/GB1281599A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
    • G01J1/00—Photometry, e.g. photographic exposure meter
    • G01J1/42—Photometry, e.g. photographic exposure meter using electric radiation detectors
    • G01J1/4204—Photometry, e.g. photographic exposure meter using electric radiation detectors with determination of ambient light
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
    • G01J1/00—Photometry, e.g. photographic exposure meter
    • G01J1/10—Photometry, e.g. photographic exposure meter by comparison with reference light or electric value provisionally void
    • G01J1/20—Photometry, e.g. photographic exposure meter by comparison with reference light or electric value provisionally void intensity of the measured or reference value being varied to equalise their effects at the detectors, e.g. by varying incidence angle
    • G01J1/28—Photometry, e.g. photographic exposure meter by comparison with reference light or electric value provisionally void intensity of the measured or reference value being varied to equalise their effects at the detectors, e.g. by varying incidence angle using variation of intensity or distance of source
    • G01J1/30—Photometry, e.g. photographic exposure meter by comparison with reference light or electric value provisionally void intensity of the measured or reference value being varied to equalise their effects at the detectors, e.g. by varying incidence angle using variation of intensity or distance of source using electric radiation detectors
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B13/00—Burglar, theft or intruder alarms
    • G08B13/18—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength
    • G08B13/181—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength using active radiation detection systems
    • G08B13/183—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength using active radiation detection systems by interruption of a radiation beam or barrier
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
    • H03F3/04—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements with semiconductor devices only
    • H03F3/08—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements with semiconductor devices only controlled by light

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Investigating Or Analysing Materials By Optical Means (AREA)
  • Photometry And Measurement Of Optical Pulse Characteristics (AREA)
  • Geophysics And Detection Of Objects (AREA)

Abstract

1281599 Detecting objects photo-electrically CORNING GLASS WORKS 9 Oct 1969 [9 Oct 1969] 49564/69 Heading G1A An object detection system comprises a light source 14<SP>1</SP> and a photo-resistive detector 12<SP>1</SP> on opposite sides of a detection zone, a resistor 11<SP>1</SP> in series with the detector, a utilization device 19<SP>1</SP> (such as a counter) responsive (e. g, via an A.C. amplifier 18<SP>1</SP>) to rapid changes in the detector output and a feedback patch (e.g. via a D.C. amplifier 20) responsive to slow variations in the detector output to control the intensity of the light source so as to maintain the average detector output at a constant level. The system described is used for the detection of lime glass blocks which only alternate the light by about 8%. The feedback responds to changes in ambient conditions (ambient light, temperature and humidity) maintaining the operation of the detector at the same point on its characteristic. A suitable balanced D.C. transistor differential amplifier with Zener diode voltage stabilization is detailed, Fig.4 (not shown).
GB49564/69A 1968-10-09 1969-10-09 Feedback controlled photosensitive object detecting system Expired GB1281599A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US76614268A 1968-10-09 1968-10-09

Publications (1)

Publication Number Publication Date
GB1281599A true GB1281599A (en) 1972-07-12

Family

ID=25075539

Family Applications (1)

Application Number Title Priority Date Filing Date
GB49564/69A Expired GB1281599A (en) 1968-10-09 1969-10-09 Feedback controlled photosensitive object detecting system

Country Status (2)

Country Link
US (1) US3639768A (en)
GB (1) GB1281599A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2347210A (en) * 1999-02-26 2000-08-30 Infrared Eng Electro-magnetic detection apparatus

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4101808A (en) * 1975-09-30 1978-07-18 Bell & Howell Company Lamp control circuit
US4078173A (en) * 1976-06-24 1978-03-07 Pertec Computer Corporation Light amplitude control system for position and motion transducers
US4270046A (en) * 1978-11-02 1981-05-26 Texas Instruments Incorporated Two-terminal optical sensor
JPS59177186A (en) * 1983-03-26 1984-10-06 株式会社　サタケ Automatic controller for color selector
CA1222319A (en) * 1985-05-16 1987-05-26 Cip Inc. Apparatus for analysing the formation of a paper web
US5286967A (en) * 1992-12-04 1994-02-15 Stanley Home Automation Method and apparatus for self-biasing a light beam obstacle detector with a bias light
EP0907138A3 (en) * 1997-10-01 2000-11-02 PSC Scanning, Inc. Off-axis object detection system for a portable bar code scanner

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2649834A (en) * 1946-04-04 1953-08-25 Gen Aniline & Film Corp Optical feed-back densitometer
GB723786A (en) * 1951-10-26 1955-02-09 Muirhead & Co Ltd Improvements in or relating to control arrangements for photo-electric devices in facsimile apparatus and the like
US2861214A (en) * 1957-03-28 1958-11-18 Ibm Beam intensity control
US3014134A (en) * 1957-10-30 1961-12-19 North American Aviation Inc Control for intensity of illumination
US3167739A (en) * 1960-05-19 1965-01-26 Honeywell Inc Electronic object detector
US3354773A (en) * 1963-07-01 1967-11-28 Leeds & Northrup Co Automatic optical pyrometer system with automatic gain control
US3331012A (en) * 1965-01-11 1967-07-11 William R Aiken Volume stabilizer arrangement employing a photo-sensitive resistance element
GB1087990A (en) * 1965-05-03 1967-10-18 Vickers Ltd Measurement of absorption by a substance of radiation
US3471700A (en) * 1966-11-01 1969-10-07 Bell Telephone Labor Inc Linear signal gain controlled networks
US3517167A (en) * 1966-12-28 1970-06-23 Bell & Howell Co Feedback light control system

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2347210A (en) * 1999-02-26 2000-08-30 Infrared Eng Electro-magnetic detection apparatus
GB2347210B (en) * 1999-02-26 2003-08-06 Infrared Eng Infrared gauge

Also Published As

Publication number Publication date
US3639768A (en) 1972-02-01

Similar Documents

Publication Publication Date Title
KR850001585A (en) Smoke detector
KR840005214A (en) Cooker temperature detector
GB1267234A (en)
GB1117057A (en) Improvements in or relating to electronic flash apparatus for use in photography and to light responsive control circuits for use in such apparatus
GB1281599A (en) Feedback controlled photosensitive object detecting system
GB877070A (en) Improvements in or relating to apparatus for reading data from a storage medium
US3421009A (en) Temperature compensated photosensor system
GB1231906A (en)
GB1486535A (en) Fire sensor devices
US4011458A (en) Photoelectric detector with light source intensity regulation
GB1208846A (en) Threshold level detection system
GB1009049A (en) Improvements in or relating to circuit controlling devices
GB1120451A (en) Apparatus for sensing the position of a boundary surface
GB1200120A (en) Improvements in or relating to fire alarms
GB1365406A (en) Servo apparatus
GB1323662A (en) Absorptiometers
SE340258B (en)
SU605109A1 (en) Liquid level indicator
GB1298999A (en) Improvements in or relating to apparatus for detecting the passage of movable small bodies
GB1222351A (en) Improvements in or relating to fire-detection apparatus
GB1315115A (en) Wall-coverings
GB1172354A (en) Improvements relating to Smoke Detectors
GB989665A (en) Improvements in or relating to tape handling apparatus
GB1317449A (en) Photoelectric sensing device
GB1234917A (en) Improvements in and relating to photosensitive reading arrangements

Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PLNP Patent lapsed through nonpayment of renewal fees