GB2242743B - Faraday-effect optical switch - Google Patents

Faraday-effect optical switch

Info

Publication number
GB2242743B
GB2242743B GB9107224A GB9107224A GB2242743B GB 2242743 B GB2242743 B GB 2242743B GB 9107224 A GB9107224 A GB 9107224A GB 9107224 A GB9107224 A GB 9107224A GB 2242743 B GB2242743 B GB 2242743B
Authority
GB
United Kingdom
Prior art keywords
faraday
optical switch
effect optical
effect
switch
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 - Lifetime
Application number
GB9107224A
Other versions
GB9107224D0 (en
GB2242743A (en
Inventor
William Michael Glasheen
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.)
Ametek Aerospace Products Inc
Original Assignee
Ametek Aerospace Products Inc
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
Priority claimed from US07/117,174 external-priority patent/US4818080A/en
Priority claimed from US07/141,369 external-priority patent/US4864869A/en
Priority claimed from GB8825824A external-priority patent/GB2211934B/en
Application filed by Ametek Aerospace Products Inc filed Critical Ametek Aerospace Products Inc
Publication of GB9107224D0 publication Critical patent/GB9107224D0/en
Publication of GB2242743A publication Critical patent/GB2242743A/en
Application granted granted Critical
Publication of GB2242743B publication Critical patent/GB2242743B/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F15/00—Details of, or accessories for, apparatus of groups G01F1/00 - G01F13/00 insofar as such details or appliances are not adapted to particular types of such apparatus
    • G01F15/06—Indicating or recording devices
    • G01F15/065—Indicating or recording devices with transmission devices, e.g. mechanical
    • G01F15/066—Indicating or recording devices with transmission devices, e.g. mechanical involving magnetic transmission devices
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
    • G01F1/76—Devices for measuring mass flow of a fluid or a fluent solid material
    • G01F1/78—Direct mass flowmeters
    • G01F1/80—Direct mass flowmeters operating by measuring pressure, force, momentum, or frequency of a fluid flow to which a rotational movement has been imparted
    • G01F1/82—Direct mass flowmeters operating by measuring pressure, force, momentum, or frequency of a fluid flow to which a rotational movement has been imparted using a driven wheel as impeller and one or more other wheels or moving elements which are angularly restrained by a resilient member, e.g. spring member as the measuring device
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F15/00—Details of, or accessories for, apparatus of groups G01F1/00 - G01F13/00 insofar as such details or appliances are not adapted to particular types of such apparatus
    • G01F15/06—Indicating or recording devices
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/09—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on magneto-optical elements, e.g. exhibiting Faraday effect
    • G02F1/091—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on magneto-optical elements, e.g. exhibiting Faraday effect based on magneto-absorption or magneto-reflection
GB9107224A 1987-11-05 1991-04-05 Faraday-effect optical switch Expired - Lifetime GB2242743B (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US07/117,174 US4818080A (en) 1987-11-05 1987-11-05 Monolithic faraday optical switch
US07/141,369 US4864869A (en) 1988-01-04 1988-01-04 Flowmeter with faraday effect optical switch readout
GB8825824A GB2211934B (en) 1987-11-05 1988-11-04 Flowmeter

Publications (3)

Publication Number Publication Date
GB9107224D0 GB9107224D0 (en) 1991-05-22
GB2242743A GB2242743A (en) 1991-10-09
GB2242743B true GB2242743B (en) 1992-05-06

Family

ID=27264154

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9107224A Expired - Lifetime GB2242743B (en) 1987-11-05 1991-04-05 Faraday-effect optical switch

Country Status (1)

Country Link
GB (1) GB2242743B (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2721999B1 (en) * 1994-06-30 1996-08-09 Contruction De Moteurs D Aviat REDUNDANT MASS FLOWMETER
US7703514B2 (en) * 2007-12-26 2010-04-27 Schlumberger Technology Corporation Optical fiber system and method for wellhole sensing of fluid flow using diffraction effect of faraday crystal

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58190786A (en) * 1982-04-30 1983-11-07 Matsushita Electric Ind Co Ltd Optical fiber type magnetic field sensor

Also Published As

Publication number Publication date
GB9107224D0 (en) 1991-05-22
GB2242743A (en) 1991-10-09

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Legal Events

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

Effective date: 19931104