GB2155620B - Photocell & method for calibration thereof - Google Patents

Photocell & method for calibration thereof

Info

Publication number
GB2155620B
GB2155620B GB08405799A GB8405799A GB2155620B GB 2155620 B GB2155620 B GB 2155620B GB 08405799 A GB08405799 A GB 08405799A GB 8405799 A GB8405799 A GB 8405799A GB 2155620 B GB2155620 B GB 2155620B
Authority
GB
United Kingdom
Prior art keywords
photocell
calibration
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.)
Expired
Application number
GB08405799A
Other versions
GB2155620A (en
GB8405799D0 (en
Inventor
Kwai Cheung Chun-Long Danny Li
Dennis Norman Lyman
David Victor Currie
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.)
Holophane Europe Ltd
Original Assignee
Holophane Europe 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 Holophane Europe Ltd filed Critical Holophane Europe Ltd
Priority to GB08405799A priority Critical patent/GB2155620B/en
Publication of GB8405799D0 publication Critical patent/GB8405799D0/en
Publication of GB2155620A publication Critical patent/GB2155620A/en
Application granted granted Critical
Publication of GB2155620B publication Critical patent/GB2155620B/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/26—Testing of individual semiconductor devices
    • G01R31/2607—Circuits therefor
    • G01R31/2632—Circuits therefor for testing diodes
    • G01R31/2635—Testing light-emitting diodes, laser diodes or photodiodes
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R35/00—Testing or calibrating of apparatus covered by the other groups of this subclass
    • G01R35/005—Calibrating; Standards or reference devices, e.g. voltage or resistance standards, "golden" references

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Electronic Switches (AREA)
GB08405799A 1984-03-06 1984-03-06 Photocell & method for calibration thereof Expired GB2155620B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB08405799A GB2155620B (en) 1984-03-06 1984-03-06 Photocell & method for calibration thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB08405799A GB2155620B (en) 1984-03-06 1984-03-06 Photocell & method for calibration thereof

Publications (3)

Publication Number Publication Date
GB8405799D0 GB8405799D0 (en) 1984-04-11
GB2155620A GB2155620A (en) 1985-09-25
GB2155620B true GB2155620B (en) 1988-02-24

Family

ID=10557637

Family Applications (1)

Application Number Title Priority Date Filing Date
GB08405799A Expired GB2155620B (en) 1984-03-06 1984-03-06 Photocell & method for calibration thereof

Country Status (1)

Country Link
GB (1) GB2155620B (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB9305687D0 (en) * 1993-03-19 1993-05-05 Renishaw Metrology Ltd A signal processing for trigger probe
GB9415338D0 (en) * 1994-07-29 1994-09-21 Renishaw Plc Trigger probe circuit
DE19606674B4 (en) * 1996-02-22 2004-05-13 Siemens Ag Procedure for controlling the lighting of a room

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE348315B (en) * 1969-02-18 1972-08-28 S Rydborn
GB1567306A (en) * 1976-01-05 1980-05-14 Chilvers G Light activated control system
GB2097918B (en) * 1981-05-06 1984-10-17 Duport Ltd Controlling lighting system
GB2107859B (en) * 1981-10-15 1985-01-30 John Martin Warrington Night light activator
JPS58143226A (en) * 1982-02-19 1983-08-25 Terumo Corp Electronic clinical thermometer

Also Published As

Publication number Publication date
GB2155620A (en) 1985-09-25
GB8405799D0 (en) 1984-04-11

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee

Effective date: 19940306