FR2238150A1 - - Google Patents

Info

Publication number
FR2238150A1
FR2238150A1 FR7424959A FR7424959A FR2238150A1 FR 2238150 A1 FR2238150 A1 FR 2238150A1 FR 7424959 A FR7424959 A FR 7424959A FR 7424959 A FR7424959 A FR 7424959A FR 2238150 A1 FR2238150 A1 FR 2238150A1
Authority
FR
France
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.)
Withdrawn
Application number
FR7424959A
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.)
TDK Micronas GmbH
ITT Inc
Original Assignee
Deutsche ITT Industries GmbH
ITT Industries Inc
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 Deutsche ITT Industries GmbH, ITT Industries Inc filed Critical Deutsche ITT Industries GmbH
Publication of FR2238150A1 publication Critical patent/FR2238150A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • 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
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G1/00—Details of arrangements for controlling amplification
    • H03G1/0005—Circuits characterised by the type of controlling devices operated by a controlling current or voltage signal
    • H03G1/0035—Circuits characterised by the type of controlling devices operated by a controlling current or voltage signal using continuously variable impedance elements
    • H03G1/0041—Circuits characterised by the type of controlling devices operated by a controlling current or voltage signal using continuously variable impedance elements using thermistors

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Mathematical Physics (AREA)
  • Theoretical Computer Science (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Investigating Or Analysing Materials By Optical Means (AREA)
  • Investigating Or Analyzing Materials Using Thermal Means (AREA)
  • Indication And Recording Devices For Special Purposes And Tariff Metering Devices (AREA)
FR7424959A 1973-07-20 1974-07-18 Withdrawn FR2238150A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US00381248A US3840305A (en) 1973-07-20 1973-07-20 Electro-optical apparatus with temperature compensation

Publications (1)

Publication Number Publication Date
FR2238150A1 true FR2238150A1 (fr) 1975-02-14

Family

ID=23504276

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7424959A Withdrawn FR2238150A1 (fr) 1973-07-20 1974-07-18

Country Status (7)

Country Link
US (1) US3840305A (fr)
CA (1) CA1012792A (fr)
DE (1) DE2434381A1 (fr)
FR (1) FR2238150A1 (fr)
GB (1) GB1472949A (fr)
IT (1) IT1017210B (fr)
NL (1) NL7409367A (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4312593A (en) * 1979-12-21 1982-01-26 E. I. Du Pont De Nemours And Company Direct readout apparatus for measuring light transmitted through liquids
GB2148487B (en) * 1983-10-13 1987-01-14 Perkins Engines Group Apparatus for measuring smoke density
JPS62112038A (ja) * 1985-11-09 1987-05-23 Horiba Ltd 吸光分析計における感度校正機構
JPH04148846A (ja) * 1990-10-13 1992-05-21 Jasco Corp 濃度補正装置
CN107966095B (zh) * 2017-12-26 2024-03-01 李明俊 一种弹簧长度检测控制方法以及检测控制***

Also Published As

Publication number Publication date
CA1012792A (en) 1977-06-28
GB1472949A (en) 1977-05-11
NL7409367A (nl) 1975-01-22
DE2434381A1 (de) 1975-02-27
US3840305A (en) 1974-10-08
IT1017210B (it) 1977-07-20

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Legal Events

Date Code Title Description
ST Notification of lapse