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WO2008060599A3 - Magnetic direct drive shutter actuation system - Google Patents

Magnetic direct drive shutter actuation system Download PDF

Info

Publication number
WO2008060599A3
WO2008060599A3 PCT/US2007/024005 US2007024005W WO2008060599A3 WO 2008060599 A3 WO2008060599 A3 WO 2008060599A3 US 2007024005 W US2007024005 W US 2007024005W WO 2008060599 A3 WO2008060599 A3 WO 2008060599A3
Authority
WO
WIPO (PCT)
Prior art keywords
direct drive
actuation system
magnets
pivot
aperture
Prior art date
Application number
PCT/US2007/024005
Other languages
French (fr)
Other versions
WO2008060599A2 (en
Inventor
David W Durfee
Original Assignee
Melles Griot 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
Application filed by Melles Griot Inc filed Critical Melles Griot Inc
Publication of WO2008060599A2 publication Critical patent/WO2008060599A2/en
Publication of WO2008060599A3 publication Critical patent/WO2008060599A3/en

Links

Classifications

    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B9/00—Exposure-making shutters; Diaphragms
    • G03B9/08—Shutters
    • G03B9/10—Blade or disc rotating or pivoting about axis normal to its plane
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K33/00—Motors with reciprocating, oscillating or vibrating magnet, armature or coil system
    • H02K33/16—Motors with reciprocating, oscillating or vibrating magnet, armature or coil system with polarised armatures moving in alternate directions by reversal or energisation of a single coil system

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Shutters For Cameras (AREA)

Abstract

This magnetic direct drive shutter actuation system for an optical shutter with an aperture and shutter blades has blades rigidly connected via a pivot to a permanent magnet or magnets. This magnet or magnets have magnetic axes parallel to the pivot. The magnet or magnets is/are moved so as to cause rotation of said pivot and thereby open or close said aperture by electromagnets peripheral to the aperture. In the preferred embodiment, the electromagnet(s) form a quadrapole.
PCT/US2007/024005 2006-11-15 2007-11-15 Magnetic direct drive shutter actuation system WO2008060599A2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US85918406P 2006-11-15 2006-11-15
US60/859,184 2006-11-15

Publications (2)

Publication Number Publication Date
WO2008060599A2 WO2008060599A2 (en) 2008-05-22
WO2008060599A3 true WO2008060599A3 (en) 2008-07-10

Family

ID=39402264

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2007/024005 WO2008060599A2 (en) 2006-11-15 2007-11-15 Magnetic direct drive shutter actuation system

Country Status (1)

Country Link
WO (1) WO2008060599A2 (en)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4332722A (en) * 1975-02-17 1982-06-01 Shionogi & Co., Ltd. Cyclization to form cephem ring and intermediates therefor
US4413895A (en) * 1982-03-22 1983-11-08 Eastman Kodak Company Electromagnetic actuator having a compliant armature
US5173728A (en) * 1991-07-25 1992-12-22 Eastman Kodak Company Magnet and shutter assembly for an electromagnetic shutter
US5687417A (en) * 1996-11-18 1997-11-11 Eastman Kodak Company Electromagnetic actuator for providing a hard stop for moving blade aperture systems
JP2001133835A (en) * 1999-11-02 2001-05-18 Fuji Photo Film Co Ltd Shutter device for camera

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4332722A (en) * 1975-02-17 1982-06-01 Shionogi & Co., Ltd. Cyclization to form cephem ring and intermediates therefor
US4413895A (en) * 1982-03-22 1983-11-08 Eastman Kodak Company Electromagnetic actuator having a compliant armature
US5173728A (en) * 1991-07-25 1992-12-22 Eastman Kodak Company Magnet and shutter assembly for an electromagnetic shutter
US5687417A (en) * 1996-11-18 1997-11-11 Eastman Kodak Company Electromagnetic actuator for providing a hard stop for moving blade aperture systems
JP2001133835A (en) * 1999-11-02 2001-05-18 Fuji Photo Film Co Ltd Shutter device for camera

Also Published As

Publication number Publication date
WO2008060599A2 (en) 2008-05-22

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