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Ishimasa

Mitsunori Ishimasa, Toyama-Ken JP

Patent application numberDescriptionPublished
20090015108PIEZOELECTRIC ELECTROACOUSTIC TRANSDUCER - A piezoelectric electroacoustic transducer includes a substantially rectangular piezoelectric diaphragm, a case having supports to support the four corners of the bottom surface of the piezoelectric diaphragm, terminals fixed to the case, each including an inner connection portion exposed near the supports, a first elastic adhesive disposed between the periphery of the piezoelectric diaphragm and the terminals, a conductive adhesive disposed between electrodes of the piezoelectric diaphragm and the terminals across the top surface of the first elastic adhesive, a second elastic adhesive filling and sealing a gap between the periphery of the piezoelectric diaphragm and an inner portion of the case, and an overamplitude-preventing receiver provided on a bottom wall of the case to limit the amplitude of vibration of the piezoelectric diaphragm to a predetermined range. The overamplitude-preventing receiver is disposed closer to the center of the piezoelectric diaphragm than the supports.01-15-2009

Toru Ishimasa, Kawasaki-Shi JP

Patent application numberDescriptionPublished
20100054101Lens driving apparatus - A lens driving apparatus installed into an optical unit, includes a lead screw rotated by a rotation of a motor, a lens holder moved reciprocally along a rotation axis line of the lead screw by a rotation of the lead screw, a guide shaft extended in parallel with the rotation axis line, and passing through the lens holder to guide, and a lens held at a free end of the lens holder in a cantilever state.03-04-2010
20100165488LENS BARREL AND IMAGING APPARATUS - When the lens barrel is in the storage state, a part of a lens group and a group cylinder are inserted into an aperture of a diaphragm unit and a shutter blade of a shutter unit is closed for light shielding. With this arrangement, the cylinder length in the storage state is shortened, and the performance degradation of an image sensor and optical components provided on a front side of an image sensor can be prevented as well.07-01-2010
20100322609LENS BARREL THAT CHANGES FOCAL LENGTH AND IMAGE PICKUP APPARATUS EQUIPPED WITH LENS BARREL - A lens barrel that is capable of decreasing a barrel length under a retracted condition by simplifying a configuration. The lens barrel changes a focal length by moving first and second lens groups in an optical axis direction. A light-amount adjusting member is located between the first and second lens groups. First, second, third holding frames hold the first lens group, the second lens group, and the light-amount adjusting member, respectively. A cam mechanism moves the first, second, and third holding frames in the optical axis direction so that a part of the second lens group is inserted into the aperture of the light-amount adjusting member and concave and convex surfaces of the first and second lens groups are overlapped in the optical axis direction under a retracted condition. The aperture diameter of the light-amount adjusting member is enlarged when shifting to the retracted condition from a shooting condition.12-23-2010
20110037874IMAGE PICK-UP APPARATUS TO PICK UP STATIC IMAGE - An image pick-up apparatus that is capable of correcting shading due to a closing travel operation of a shutter by a simple process. An image pick-up device picks up the image formed. A shutter unit opens and closes a substantially rectangular aperture corresponding to image pick-up area of the image pick-up device by means of a plurality of rotating shutter blades. The shutter blades travel in mutually opposite directions perpendicular to a long side of the aperture while keeping edges of the shutter blades facing the aperture are parallel to the long side so that edge portions that cover a center area of the aperture start shading the aperture before edge portions that cover four corner areas of the aperture start shading the aperture.02-17-2011

Toru Ishimasa, Kanagawa JP

Patent application numberDescriptionPublished
20100039717LENS DRIVING DEVICE - A lens drive apparatus comprises a base 02-18-2010

Yukio Ishimasa, Tokyo JP

Patent application numberDescriptionPublished
20120100785METHOD FOR CHAMFERING WAFER - In a conventional wafer chamfering process, the chamfered shape (cross-sectional shape) of the wafer circumference is uniform. However, in the chamfering step in wafer manufacture, the uniform chamfered shape varies with respective circumferential positions. Therefore, a wafer chamfering method that takes into account deformation in the chamfering step in the wafer manufacture is to be provided. The wafer chamfering method is for chamfering a wafer by bringing a grooveless grindstone into contact with the edge (circumferential end) of a wafer. By this wafer chamfering method, a movement trajectory formed by moving the wafer and the grindstone in a relative manner in the Z-axis and Y-axis directions and forming the same cross-sectional shape on the entire wafer circumference is set as a reference. So as to perform a processing operation in which the relative positions of the wafer and the grindstone are changed from positions on the reference trajectory at least in one of the Z-axis and Y-axis directions depending on wafer rotation angle positions, different cross-sectional shapes are formed depending on the wafer rotation angle positions with the use of a piezoelectric actuator.04-26-2012