Patent ID: 8508828
Filing Date: 2013-08-13
Classification: G02B,G03B,H02K

Abstract:
1. A magnetic voice-coil shutter drive actuation system for an optical shutter having an aperture with at least one shutter blade, comprising: a) an actuator operatively connected to an aperture shutter blade, said actuator operating to close said aperture shutter blade when moved in one direction and operating to open said aperture shutter blade when moved in an other direction; b) a moveable element comprising one of a moveable voice coil and a moveable permanent magnet operatively connected to said actuator, said voice coil being activatable to generate an electromagnetic flux in a first polar orientation and also being activatable to generate an electromagnetic flux in a second polar orientation; c) a fixed element comprising one of a fixed permanent magnet generating a magnetic flux where a moveable voice coil is operatively connected to said actuator and a fixed voice coil where a moveable permanent magnet is operatively attached to said actuator; and d) wherein the magnetic flux from said permanent magnet interacts with said electromagnetic flux when activated in a first polar orientation so as to cause said moveable element to move said actuator so as to close said shutter blade, and which magnetic flux will interact with said electromagnetic flux when activated in a second polar orientation so as to cause said moveable element to move said actuator so as to open said shutter blade.