JPS5673336A - Toner concentration sensor - Google Patents

Toner concentration sensor

Info

Publication number
JPS5673336A
JPS5673336A JP15046579A JP15046579A JPS5673336A JP S5673336 A JPS5673336 A JP S5673336A JP 15046579 A JP15046579 A JP 15046579A JP 15046579 A JP15046579 A JP 15046579A JP S5673336 A JPS5673336 A JP S5673336A
Authority
JP
Japan
Prior art keywords
light
light quantity
receiving element
toner concentration
reflective
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.)
Pending
Application number
JP15046579A
Other languages
Japanese (ja)
Inventor
Kenta Watase
Takaaki Miyashita
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.)
Ricoh Co Ltd
Original Assignee
Ricoh Co Ltd
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 Ricoh Co Ltd filed Critical Ricoh Co Ltd
Priority to JP15046579A priority Critical patent/JPS5673336A/en
Publication of JPS5673336A publication Critical patent/JPS5673336A/en
Pending 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
    • G01N21/47—Scattering, i.e. diffuse reflection
    • G01N21/4738—Diffuse reflection, e.g. also for testing fluids, fibrous materials
    • G01N21/474—Details of optical heads therefor, e.g. using optical fibres

Landscapes

  • Physics & Mathematics (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)
  • Dry Development In Electrophotography (AREA)

Abstract

PURPOSE:To arrange so that a toner concentration inside a developing device may be detected accurately by providing a member to adjust a positive reflective light proceeding to a light-receiving element for light quantity compensation of a sensor to a light flux of proper light quantity so that a correct light quantity signal may be generated. CONSTITUTION:A reflective light L irradiated from a light source 4 against a developing agent A located at a measurement position B is divided into a penetrating light and a positive reflective light by means of a light passage splitting member 224. The penetrating light L1 becomes a reflective light L2 at a measuring position B, reaching a main light-receiving element 5 and is converted to a toner concentration signal F. The positive reflective light L3 penetrates through a diffusion layer 711 of a diffuser 11 on a light quantity adjustment member and then is converted to a light quantity signal H by a light-receiving element 6 for light quantity compensation after light quantity adjustment. The positive reflective light L3 has its directional property lessened during its passage through the diffusion layer 711, so that a correct light quantity signal H can be obtained, even if any error exists in installing the light-receiving element 6 or the light source 4. The both signals F, H are inputted to a toner concentration control circuit 51.
JP15046579A 1979-11-20 1979-11-20 Toner concentration sensor Pending JPS5673336A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15046579A JPS5673336A (en) 1979-11-20 1979-11-20 Toner concentration sensor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15046579A JPS5673336A (en) 1979-11-20 1979-11-20 Toner concentration sensor

Publications (1)

Publication Number Publication Date
JPS5673336A true JPS5673336A (en) 1981-06-18

Family

ID=15497504

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15046579A Pending JPS5673336A (en) 1979-11-20 1979-11-20 Toner concentration sensor

Country Status (1)

Country Link
JP (1) JPS5673336A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2579884A1 (en) * 1985-04-09 1986-10-10 Sanofi Sa
JPH01202642A (en) * 1988-02-09 1989-08-15 Canon Inc Measuring apparatus
EP0360484A2 (en) * 1988-09-19 1990-03-28 Xerox Corporation Densitometer for measuring specular reflectivity

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2579884A1 (en) * 1985-04-09 1986-10-10 Sanofi Sa
EP0198759A2 (en) * 1985-04-09 1986-10-22 Sanofi Apparatus for the measurement of the luminosity of the skin
JPH01202642A (en) * 1988-02-09 1989-08-15 Canon Inc Measuring apparatus
EP0360484A2 (en) * 1988-09-19 1990-03-28 Xerox Corporation Densitometer for measuring specular reflectivity

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