JPS53125885A - Photometric device for two frequencies - Google Patents

Photometric device for two frequencies

Info

Publication number
JPS53125885A
JPS53125885A JP4077777A JP4077777A JPS53125885A JP S53125885 A JPS53125885 A JP S53125885A JP 4077777 A JP4077777 A JP 4077777A JP 4077777 A JP4077777 A JP 4077777A JP S53125885 A JPS53125885 A JP S53125885A
Authority
JP
Japan
Prior art keywords
frequencies
photometric device
normal
condition
value
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.)
Granted
Application number
JP4077777A
Other languages
Japanese (ja)
Other versions
JPS6049846B2 (en
Inventor
Kikuo Sasaki
Go Morigami
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.)
Shimadzu Corp
Original Assignee
Shimadzu 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 Shimadzu Corp filed Critical Shimadzu Corp
Priority to JP4077777A priority Critical patent/JPS6049846B2/en
Publication of JPS53125885A publication Critical patent/JPS53125885A/en
Publication of JPS6049846B2 publication Critical patent/JPS6049846B2/en
Expired 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
    • G01N21/274—Calibration, base line adjustment, drift correction

Abstract

PURPOSE:To return the operation to its normal condition in an automatic manner even after a reference light restores its original condition by changing the reference voltage, which is to be compared with the photometric value of a feedback circuit, between a normal value and ''0''.
JP4077777A 1977-04-09 1977-04-09 Dual frequency photometry device Expired JPS6049846B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4077777A JPS6049846B2 (en) 1977-04-09 1977-04-09 Dual frequency photometry device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4077777A JPS6049846B2 (en) 1977-04-09 1977-04-09 Dual frequency photometry device

Publications (2)

Publication Number Publication Date
JPS53125885A true JPS53125885A (en) 1978-11-02
JPS6049846B2 JPS6049846B2 (en) 1985-11-05

Family

ID=12590049

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4077777A Expired JPS6049846B2 (en) 1977-04-09 1977-04-09 Dual frequency photometry device

Country Status (1)

Country Link
JP (1) JPS6049846B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59107221A (en) * 1982-12-11 1984-06-21 Japan Spectroscopic Co Spectrophotometer

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59107221A (en) * 1982-12-11 1984-06-21 Japan Spectroscopic Co Spectrophotometer

Also Published As

Publication number Publication date
JPS6049846B2 (en) 1985-11-05

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