Abstract:
PROBLEM TO BE SOLVED: To provide an optical reflection element capable of projecting clear images by reducing undesirable vibration induced on actuators for scanning a light beam along two axes.SOLUTION: An optical reflection element of the present invention includes: a first frame member 22; a pair of first vibrating members 23, each having one end supported at an opposing point on the inner side of the first frame member 22; a second frame member 25 which is supported at the other ends of the first vibrating members 23 using connectors 24; a pair of second vibrating members 26, each having one end supported at an opposing point on the inner side of the second frame member 25 in a direction substantially perpendicular to a vibration axis of the first vibration members 23; and a mirror member supported by the other ends of the second vibrating members 26. The connectors 24 have resin layers.
Abstract:
PROBLEM TO BE SOLVED: To provide a highly reliable actuator with respect to repetitive stress.SOLUTION: The actuator includes: a movable part 9 with wiring 14; and a driving part 12 for driving the movable part 9 by torsional motion or bending motion, or both of these motions. The wiring 14 is formed of conducting organic polymer. Thus, a lower electrode, an upper electrode, and wiring disposed in the movable part 9 subjected to repetitive stress are formed of the conducting organic polymer instead of metal. This eliminates the probability of migration, and also enhances the flexibility of the movable part, thereby providing a highly reliable actuator.
Abstract:
PROBLEM TO BE SOLVED: To suppress damage of an optical reflection element. SOLUTION: The optical reflection element includes: a mirror part 1, a movable frame 3 that is connected to a mirror part 1 via a first beam 2 and surrounds the outer periphery of the first beam 2 and the mirror part 1; a support body 5 connected to the movable frame 3 via a second beam 4; a driving means for repetitively rotating and vibrating the mirror part 1 around each of the center axes of the first beam 2 and the second beam 4; and a suppressing means for suppressing vibration of at least one of the X-axis direction and Y-axis direction of the movable frame 3. Thus, excessive amplitude of the movable frame 3 can be suppressed, and the damage of the optical reflection element can be suppressed. COPYRIGHT: (C)2010,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a piezoelectric actuator in which occurrence of disconnection in metal wiring due to stress migration is reduced.SOLUTION: A piezoelectric actuator includes a vibration plate formed of a silicon substrate 15 and a piezoelectric layer 17 at the upper part of the vibration plate. The piezoelectric layer 17 comprises a lower electrode film 19, a piezoelectric film 20 provided at the upper part of the lower electrode film 19, and an upper electrode film 21 provided at the upper part of the piezoelectric film 20. The intrinsic stress of at least one of the electrode films of the upper electrode film 21 or the lower electrode film 19 is made to compressive stress.
Abstract:
PROBLEM TO BE SOLVED: To improve the drive efficiency of a meander type oscillator. SOLUTION: Drive elements 15 are provided respectively on a plurality of oscillation plates 11. The drive elements 15 are arranged closer to one end side opposite to the drive elements 15 provided on an adjoining oscillation plate 11, while being on one end side of the oscillation plate 11. Thee meander type oscillator is driven in switchback manner as a whole, resulting in a natural operation mode with less energy loss than before. As a result, a high driving efficiency is realized. COPYRIGHT: (C)2010,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide an optical reflection element capable of improving a resonance frequency of an operation mode which vibrates to a normal line direction of a movable plate without causing a reduction in amplitude in the rotation operation of the movable plate.SOLUTION: There is provided an optical reflection element which comprises: a first side 11a parallel to a first axis 18; a square external frame having a second side 11b parallel to a second axis 19 which is almost orthogonal to the first axis 18; a first drive part having a meander shape which extends from the inside of one first side 11a of the external frame and is provided with at least one or more piezoelectric actuators; a strip-shaped support beam extending from an approximately middle point of the inside of one first side 11a of the external frame to a direction of the second axis 19; and a movable plate 15 which is connected to the support beam 12 and the drive part and has a reflection surface at the central part.
Abstract:
PROBLEM TO BE SOLVED: To enlarge swing angle of a mirror part in an optical reflection element using a meandering oscillation part.SOLUTION: The optical reflection element 1 comprises a fixed frame 2, a pair of low-speed meandering oscillation parts 3 with their outer ends supported by portions facing with each other on the inside of the fixed frame 2, a movable frame 4 supported by each inner end of the low-speed meandering oscillation parts 3, a pair of high-speed meandering oscillation parts 5 with their inner ends supported by portions of the movable frame 4 on the inside orthogonal to the oscillation shaft of the low-speed meandering oscillation parts 3, and a mirror part 6 supporting inner ends of the high-speed meandering oscillation parts 5 so that the curvature of a curved part 7 of the high-speed meandering oscillation parts 5 is made smaller from the inner end side toward the outer end side.