摘要:
A disk drive includes a storage disk, a data transducer, an actuator assembly and a positioner. The actuator assembly supports the data transducer over the storage disk. The actuator assembly includes a rotatable actuator hub and a longitudinal axis. The positioner moves the actuator assembly to position the data transducer relative to the storage disk. During movement of the actuator assembly, the actuator hub is subject to a resultant force that causes track misregistration of the data transducer. The positioner includes a magnet assembly that generates a magnetic field, a first conductor region and a second conductor region. In one embodiment, the conductor regions cooperate with the magnet assembly to generate a first force and a second force that are each directed at an angle having an absolute value that is greater than zero degrees and less than approximately 45 degrees relative to the longitudinal axis of the actuator assembly. In another embodiment, the conductor regions are each positioned at an angle having an absolute value of greater than approximately 45 degrees and less than 90 degrees relative to the longitudinal axis of the actuator assembly.
摘要:
A micro-electro-mechanical system (MEMS) mirror device includes a mirror coupled to an actuator by a first torsional hinge along a rotational axis. The actuator has a body and a group of rotational teeth extending from the body. An anchor is coupled another end of the actuator by a second torsional hinge along the rotational axis.
摘要:
A micro-electro-mechanical system (MEMS) device includes a mirror having a top surface with trenches, a beam connected to the mirror, rotational comb teeth connected to the beam, and one or more springs connecting the beam to a bonding pad. The mirror can have a bottom surface for reflecting light. Stationary comb teeth can be interdigitated with the rotational comb teeth either in-plane or out-of-plane. Steady or oscillating voltage difference between the rotational and the stationary comb teeth can be used to oscillate or tune the mirror. The comb teeth can have a tapered shape.
摘要:
A Micro-Electro-Mechanical Systems (MEMS) actuator employs electrostatic comb electrodes to position optical elements along multiple axes. In one embodiment, an actuator assembly includes an actuator support, typically a silicon wafer, supporting a fixed comb with a plurality of teeth. A frame flexibly connected to the actuator support includes a complementary set of movable comb electrodes, the teeth of which are arranged interdigitally with the teeth of the fixed combs. The frame can be tilted with respect to the actuator support along a first fulcrum axis by applying a potential difference between the fixed and movable combs. Each actuator assembly also includes an actuated member, a mirror mount in one embodiment, flexibly connected to the frame. The actuated member and the frame include electrical isolated, interdigitated, combs. The actuated member can be moved relative to the frame along a second fulcrum axis by applying a potential between these interdigitated combs. A bonding process for fabrication of an array of actuators is described.
摘要:
Variable optical attenuators that use a blade in a gap between two fibers to control the optical attenuation without having coupling optics in the gap, where the blade has at least one blade surface at an angle with respect to an end facet of one fiber.
摘要:
A touch panel system includes a panel, first and second scanning mirrors located about first and second panel corners, a photodetector array along a first panel edge between the first and the second panel corners, and a stationary plane mirror along a second panel edge adjacent to the first panel edge. The first scanning mirror sweeps a light beam across the panel. The second mirror sweeps another light beam across the panel, a part of which reflects from the stationary plane mirror to back into the panel to sweep the panel from a different angle. The light beams, including the reflected part from the stationary plane mirror, strike objects on the panel and reflect towards the photodetector array. Angular positions of the first and the second scanning mirrors at the times the photodetector array detects the reflected light are correlated to object locations.
摘要:
A micro-electromechanical (MEMS) switch includes a substrate, stationary actuator comb teeth extending from a stationary actuator pad supported above the substrate, stationary contact comb teeth extending from a stationary contact pad supported above the substrate, and a body suspended over the substrate for rotation about an axis perpendicular to the substrate. The body includes movable actuator comb teeth interdigitated in-plane with the stationary actuator comb teeth where the shortest distance between adjacent movable and stationary actuator comb teeth has a first value. The body further includes movable contact comb teeth interdigitated in-plane with the stationary contact comb teeth where the shortest distance between adjacent movable and stationary contact comb teeth has a second value smaller than the first value.
摘要:
In one embodiment of the invention, a MEMS structure includes a first electrode, a second electrode, and a mobile element. The first electrode is coupled to a first voltage source. The second electrode is coupled to a second voltage source. The mobile element includes a third electrode coupled to a third voltage source. A steady voltage difference between the first electrode and the third electrode is used to tune the natural frequency of the structure to a scanning frequency of an application. An oscillating voltage difference between the second electrode and the third electrode at the scanning frequency of the application is used to oscillate the mobile element. In one embodiment, the mobile unit is a mirror.
摘要:
A micro-electro-mechanical system (MEMS) device includes a mirror having a top surface with trenches, a beam connected to the mirror, rotational comb teeth connected to the beam, and one or more springs connecting the beam to a bonding pad. The mirror can have a bottom surface for reflecting light. The mirror can include a top flange and a bottom flange joined by a web, wherein the top and the bottom flanges form the top and the bottom surfaces, respectively. The rotational comb teeth can have a tapered shape. Stationary comb teeth can be interdigitated with the rotational comb teeth either in-plane or out-of-plane. Steady or oscillating voltage difference between the rotational and the stationary comb teeth can be used to oscillate or tune the mirror.
摘要:
A micro-electro-mechanical system (MEMS) mirror device includes (1) a mirror, (2) a first group of spring elements coupled to one half of the mirror, (3) a first beam coupled to the first group of spring elements, (4) a first spring coupled to the first beam, and (5) a first stationary pad coupled to the first spring. The device further includes (6) a second group of spring elements coupled in parallel to another half of the mirror, (7) a second beam coupled to the second group of spring elements, (8) a second spring coupled to the second beam, (9) and a second stationary pad coupled to the second spring. The device further includes a third beam that rigidly interconnects the first and the second beams so they rotate the mirror in unison.