FR2284868A1 - Measuring light on charge memory photocell - by measuring loss of reference charge after set period - Google Patents

Measuring light on charge memory photocell - by measuring loss of reference charge after set period

Info

Publication number
FR2284868A1
FR2284868A1 FR7431439A FR7431439A FR2284868A1 FR 2284868 A1 FR2284868 A1 FR 2284868A1 FR 7431439 A FR7431439 A FR 7431439A FR 7431439 A FR7431439 A FR 7431439A FR 2284868 A1 FR2284868 A1 FR 2284868A1
Authority
FR
France
Prior art keywords
measuring
charge
photocell
loss
cell
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
FR7431439A
Other languages
French (fr)
Other versions
FR2284868B1 (en
Inventor
Pierre L Beaudoin
Pierre Debord
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.)
Compagnie IBM France SAS
Original Assignee
Compagnie IBM France SAS
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 Compagnie IBM France SAS filed Critical Compagnie IBM France SAS
Priority to FR7431439A priority Critical patent/FR2284868A1/en
Publication of FR2284868A1 publication Critical patent/FR2284868A1/en
Application granted granted Critical
Publication of FR2284868B1 publication Critical patent/FR2284868B1/fr
Granted legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R29/00—Arrangements for measuring or indicating electric quantities not covered by groups G01R19/00 - G01R27/00
    • G01R29/24—Arrangements for measuring quantities of charge
    • 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
    • G01J1/46—Electric circuits using a capacitor

Abstract

The proposed method of measuring the quantity of light received during a given time (T) by a photosensitive cell of the charge memory type involves, for each measurement operation, charging the cell to a reference level, and after an interval of time (T), measuring the loss of charge from the cell. This may be done by recharging the cell to the reference level and measuring the charging current. The above process may be applied sequentially to a group of photocells of the charge memory type.
FR7431439A 1974-09-11 1974-09-11 Measuring light on charge memory photocell - by measuring loss of reference charge after set period Granted FR2284868A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7431439A FR2284868A1 (en) 1974-09-11 1974-09-11 Measuring light on charge memory photocell - by measuring loss of reference charge after set period

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7431439A FR2284868A1 (en) 1974-09-11 1974-09-11 Measuring light on charge memory photocell - by measuring loss of reference charge after set period

Publications (2)

Publication Number Publication Date
FR2284868A1 true FR2284868A1 (en) 1976-04-09
FR2284868B1 FR2284868B1 (en) 1976-12-31

Family

ID=9143175

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7431439A Granted FR2284868A1 (en) 1974-09-11 1974-09-11 Measuring light on charge memory photocell - by measuring loss of reference charge after set period

Country Status (1)

Country Link
FR (1) FR2284868A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1130371A1 (en) * 1998-09-16 2001-09-05 Hamamatsu Photonics K.K. Integrated photodetection system

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3579189A (en) * 1968-12-13 1971-05-18 Rca Corp Coupling and driving circuit for matrix array
GB1263080A (en) * 1968-05-06 1972-02-09 Plessey Co Ltd Improvements in or relating to light detector arrays

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1263080A (en) * 1968-05-06 1972-02-09 Plessey Co Ltd Improvements in or relating to light detector arrays
US3579189A (en) * 1968-12-13 1971-05-18 Rca Corp Coupling and driving circuit for matrix array

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
REVUE US "IBM TECHNICAL DISCLOSURE BULLETIN", VOLUME 15, NO. 11, AVRIL 1973 "SELF-SCANNED INTEGRATING PHOTODETECTORCELL" R.W.HANNA, PAGES 3506-2507) *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1130371A1 (en) * 1998-09-16 2001-09-05 Hamamatsu Photonics K.K. Integrated photodetection system
US6448546B1 (en) 1998-09-16 2002-09-10 Hamamatsu Photonics K.K. Integrating photodetection system

Also Published As

Publication number Publication date
FR2284868B1 (en) 1976-12-31

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Legal Events

Date Code Title Description
ST Notification of lapse