GB1191719A - Device for Measuring Light Intensities - Google Patents

Device for Measuring Light Intensities

Info

Publication number
GB1191719A
GB1191719A GB4943267A GB4943267A GB1191719A GB 1191719 A GB1191719 A GB 1191719A GB 4943267 A GB4943267 A GB 4943267A GB 4943267 A GB4943267 A GB 4943267A GB 1191719 A GB1191719 A GB 1191719A
Authority
GB
United Kingdom
Prior art keywords
photo
diode
resistor
voltage
intensities
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
GB4943267A
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.)
Technicon Corp
Original Assignee
Technicon Corp
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 Technicon Corp filed Critical Technicon Corp
Publication of GB1191719A publication Critical patent/GB1191719A/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
    • G01J1/4228—Photometry, e.g. photographic exposure meter using electric radiation detectors arrangements with two or more detectors, e.g. for sensitivity compensation
    • 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
    • G01J1/44—Electric circuits
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
    • G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
    • G01N21/27—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands using photo-electric detection ; circuits for computing concentration

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Chemical & Material Sciences (AREA)
  • Mathematical Physics (AREA)
  • Theoretical Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Photometry And Measurement Of Optical Pulse Characteristics (AREA)
  • Investigating Or Analysing Materials By Optical Means (AREA)

Abstract

1,191,719. Photo-electric circuits. TECHNICON CORP. Oct. 31, 1967 [Nov. 18, 1966], No.49432/67. Heading G1A. The voltage across a logarithmic diode in series with a photo-resistor is linearly-related to the logorithm of the intensity of light illuminating the photo-resistor. If the voltage of a D.C. supply to the diode and photo-resistor is always much greater than the diode voltage, the logarithm of two intensities is directly proportional to the difference in respective diode voltages. Two intensities may be compared directly by a wheatstone bridge formed from two diodes and two photo-resistors.
GB4943267A 1966-11-18 1967-10-31 Device for Measuring Light Intensities Expired GB1191719A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL6616304A NL6616304A (en) 1966-11-18 1966-11-18

Publications (1)

Publication Number Publication Date
GB1191719A true GB1191719A (en) 1970-05-13

Family

ID=19798231

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4943267A Expired GB1191719A (en) 1966-11-18 1967-10-31 Device for Measuring Light Intensities

Country Status (6)

Country Link
BE (1) BE705885A (en)
CH (1) CH499773A (en)
DE (1) DE1572695A1 (en)
FR (1) FR1583727A (en)
GB (1) GB1191719A (en)
NL (1) NL6616304A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116429250A (en) * 2023-06-14 2023-07-14 深圳深浦电气有限公司 Photoelectric detection circuit, photoelectric detection method, and photoelectric sensor

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3676686A (en) * 1970-07-24 1972-07-11 Instrumentation Specialties In High sensitivity light absorbance apparatus

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116429250A (en) * 2023-06-14 2023-07-14 深圳深浦电气有限公司 Photoelectric detection circuit, photoelectric detection method, and photoelectric sensor
CN116429250B (en) * 2023-06-14 2023-10-13 深圳深浦电气有限公司 Photoelectric detection circuit, photoelectric detection method, and photoelectric sensor

Also Published As

Publication number Publication date
BE705885A (en) 1968-03-01
DE1572695A1 (en) 1970-05-14
FR1583727A (en) 1969-12-05
CH499773A (en) 1970-11-30
NL6616304A (en) 1968-05-20

Similar Documents

Publication Publication Date Title
GB1285977A (en) Improved turbidimeter
GB1362319A (en) Apparatus and method for measuring the width of a strip
SE333469B (en)
GB1191719A (en) Device for Measuring Light Intensities
GB1360991A (en) Automatic control
GB1398909A (en) Displacement-measuring systems
GB1041127A (en) Method and apparatus for the photoelectric contactless measurement of dimensions
GB1438840A (en) Optical static card reader
GB1298689A (en) A capacitance meausurement circuit
GB1404549A (en) Voltage regulator
GB1172354A (en) Improvements relating to Smoke Detectors
GB994425A (en) Improvements in or relating to current regulating circuits
GB903246A (en) Improvements in photovoltaic cells
GB1253547A (en) Improvements in densitometers
SU435151A1 (en) ELECTRONIC INDEX OF TURNING AREA OF FUNCTION MEANS
GB990740A (en) Improvements relating to artificial horizons
JPS57101744A (en) Optical concentration meter
GB1128446A (en) Measurement of turbidity of fluids
SU127453A1 (en) Photoelectric Torsiometer
GB1060603A (en) Improvements in or relating to distance measuring devices
GB1238310A (en)
GB1350149A (en) Photometer
GB1316408A (en) Control devices for electronically generated light pulses
GB1097558A (en) Radiation measuring apparatus
SU463873A1 (en) Temperature measuring device

Legal Events

Date Code Title Description
PS Patent sealed
PLNP Patent lapsed through nonpayment of renewal fees