FR2359404A1 - Low light level measurement photomultiplier system - has pulse shaper circuit and integrator for high stability operation - Google Patents

Low light level measurement photomultiplier system - has pulse shaper circuit and integrator for high stability operation

Info

Publication number
FR2359404A1
FR2359404A1 FR7722205A FR7722205A FR2359404A1 FR 2359404 A1 FR2359404 A1 FR 2359404A1 FR 7722205 A FR7722205 A FR 7722205A FR 7722205 A FR7722205 A FR 7722205A FR 2359404 A1 FR2359404 A1 FR 2359404A1
Authority
FR
France
Prior art keywords
low light
pulses
integrator
high stability
light level
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.)
Withdrawn
Application number
FR7722205A
Other languages
French (fr)
Inventor
Alan John Thomas
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.)
Rank Organization Ltd
Original Assignee
Rank Organization 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 Rank Organization Ltd filed Critical Rank Organization Ltd
Publication of FR2359404A1 publication Critical patent/FR2359404A1/en
Withdrawn legal-status Critical Current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

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Photometry And Measurement Of Optical Pulse Characteristics (AREA)
  • Investigating, Analyzing Materials By Fluorescence Or Luminescence (AREA)

Abstract

The photomultiplier-based system for measuring low light levels is esp. suitable for use in fluorescence and chromatographic measurements. The output of the measuring cell is transmitted through a light-guide and filter to a secondary-electron multiplier tube. The output pulses corresponding to the individual photons, are amplified and pass through a threshold circuit for noise and interference suppression. They are then converted into pulses of constant amplitude and width by a multivibrator-limiter shaper. The pulses are then integrated at a predetermined rate of up to 107 pulses/sec. The system thus operates independently of the stability of the photo-multiplier tube.
FR7722205A 1976-07-21 1977-07-20 Low light level measurement photomultiplier system - has pulse shaper circuit and integrator for high stability operation Withdrawn FR2359404A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3032976 1976-07-21

Publications (1)

Publication Number Publication Date
FR2359404A1 true FR2359404A1 (en) 1978-02-17

Family

ID=10305918

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7722205A Withdrawn FR2359404A1 (en) 1976-07-21 1977-07-20 Low light level measurement photomultiplier system - has pulse shaper circuit and integrator for high stability operation

Country Status (4)

Country Link
JP (1) JPS5333677A (en)
DE (1) DE2733061A1 (en)
FR (1) FR2359404A1 (en)
SE (1) SE7708405L (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0526134A2 (en) * 1991-07-24 1993-02-03 Hamamatsu Photonics K.K. Feeble light measuring device

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH09196752A (en) * 1995-11-15 1997-07-31 Bunshi Bio Photonics Kenkyusho:Kk Light measuring apparatus
DE102019210421B4 (en) * 2019-07-15 2023-03-09 Leica Microsystems Cms Gmbh Method and device for measuring a light signal parameter and non-volatile storage medium

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0526134A2 (en) * 1991-07-24 1993-02-03 Hamamatsu Photonics K.K. Feeble light measuring device
EP0526134A3 (en) * 1991-07-24 1993-08-18 Hamamatsu Photonics K.K. Feeble light measuring device

Also Published As

Publication number Publication date
DE2733061A1 (en) 1978-02-02
SE7708405L (en) 1978-01-22
JPS5333677A (en) 1978-03-29

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Legal Events

Date Code Title Description
ST Notification of lapse