Panasonic Corporation

Matsushita Electric Industrial Co., Ltd.

Panasonic Intellectual Property Management Co., Ltd.

Shigeo Furukawa

Shinsuke Nakazono

Soichiro Hiraoka

Kazuki Komaki

Jirou Terada

Yuta Yamamoto

Masaki Tada

Toshiaki Horie

Masahiro Hiraka

Suzushi Kimura

Naoki Tatehata

Kazunari Nishihara

Tsuyoshi Himori

Toshinari Noda

Tsutomu Inuzuka

Mitsuhiro Fujita

Shigeki Yamada

Satoshi Tomioka

Takaaki Furumochi

Kiyomi Furukawa

Yoshiki Higashiyama

Kiyomi Furukawa, Legal Representative

An optical reflecting device includes a fixed frame, a pair of first oscillation parts, a movable frame, a pair of second oscillation parts, and a mirror part. One-side ends of the first oscillation parts are connected to the inside of the fixed frame. The movable frame is connected to and held by the other-side ends of the pair of first oscillation parts to be pivotable. One-side ends of the pair of second oscillation parts are connected to the inside of the movable frame and the pair of second oscillation parts are disposed to be substantially perpendicular to the pair of first oscillation parts. The mirror part is connected to and held by the other-side ends of the pair of second oscillation parts to be pivotable. The first oscillation parts have a meandering shape in which a plurality of straight portions and a plurality of folded portions are formed, and a stepped structure portion is provided in part of the folded portion.

Optical reflecting device

An optical reflection element according to the present invention includes a fixed frame, a pair of first oscillation parts, a movable frame, a pair of second oscillation parts, and a mirror part. One-side ends of the first oscillation parts are connected to the inside of the fixed frame. The movable frame is connected to and held by the other-side ends of the pair of first oscillation parts to be pivotable. One-side ends of the pair of second oscillation parts are connected to the inside of the movable frame and the pair of second oscillation parts are disposed to be substantially perpendicular to the pair of first oscillation parts. The mirror part is connected to and held by the other-side ends of the pair of second oscillation parts to be pivotable. The second oscillation parts have a meandering shape in which a plurality of straight portions and a plurality of folded portions are formed, and a stepped structure portion is provided in part of the folded portion.

Optical reflection element

An optical reflection element includes a frame, a meandrous vibrating part having an outer end connected with an inside of the frame, and a mirror part supported by an inner end of the meandrous vibrating part. The meandrous vibrating part has a meandrous shape that includes curved portions and vibrating beams alternately connected with the curved portions. A curvature of respective one of the curved portions is smaller than a curvature of at least one of the curved portions which is located closer to the inner end than the respective one of the curved portions. This optical reflection element has a large deflection angle of the mirror part.

An optical reflection element has a frame, a pair of meandering-shaped vibration elements, a mirror having a reflection surface, and a pair of protective beams. The vibration elements have their respective outer ends supported by confronting portions of an inside of the frame. The vibration elements support the mirror with respective inner ends thereof. The protective beams extend from the respective confronting portions of the inside of the frame toward the mirror with a predetermined space from the vibration elements and in parallel with a vibration axis of the vibration elements.

A meandering oscillator includes a plurality of oscillating plates bent and coupled in predetermined directions and piezoelectric actuators each including a lower electrode, a piezoelectric body, and an upper electrode stacked on the oscillating plate in this order, and wherein the piezoelectric actuators are alternately arranged on the oscillating plates. Thus, even when an element is made smaller, electrodes can be easily arranged. As a result, the productivity can be improved.

Meandering oscillator, optical reflecting element using meandering oscillator, and image projection device using meandering oscillator

An optical reflection element has a frame-shaped supporting body, a first oscillator and a second oscillator each having a meander shape, and a mirror portion. A line segment connecting a joining position between the mirror portion and the first oscillator to a joining position between the supporting body and the first oscillator, and a line segment connecting a joining position of the mirror portion and the second oscillator to a joining position of the supporting body and the second oscillator cross a mirror portion central axis. As one illustrative condition to be satisfied, an outer circumference of at least any one of turn portions of the first oscillator and the second oscillator is deviated from a first end portion axis that is parallel to the mirror portion central axis and extends along a first side of the mirror portion.

An optical reflection element includes a mirror portion and an oscillator coupled to the mirror portion. The oscillator includes a base, an insulating layer, a drive element, and a monitor element. The insulating layer is formed on the base. The drive element and the monitor element are formed on the insulating layer, and are separated from each other by a separation groove. Each of the drive element and the monitor element includes a lower electrode layer, a piezoelectric layer, and an upper electrode layer formed in that order on the insulating layer. The monitor element has high detection accuracy, allowing the optical reflection element to perform self-excited driving with high accuracy.

Optical reflection element with drive and monitor elements separated by a separation groove

A first oscillating portion is provided with a first piezoelectric element having a first drive electrode. A second oscillating portion has a central axis different from that of the first oscillating portion and is provided with a second piezoelectric element having a second drive electrode. The first drive electrode and the second drive electrode are connected together.

Piezoelectric actuator, optical reflection element using the same and piezoelectric driver

An optical reflection device includes a mirror having a reflection surface configured to reflect light, a first support beam connected to the mirror, a tuning fork vibrator connected to the first support beam, a second support beam connected to the tuning fork vibrator, and a supporter connected to the second support beam. The first support beam has a first end connected to the mirror and a second end located on an opposite side to the first end, and extends along a center axis. The tuning fork vibrator includes a joining portion connected to the second end of the first support beam, a first arm extending from the first joining portion while separated from the first center axis, and a second arm extending from the first joining portion symmetrically to the first arm about the first center axis. The second support beam has a third end connected to the joining portion of the tuning fork vibrator and a fourth end located on an opposite side to the third end, and extends along the first center axis.

An optical reflecting element includes a mirror, and a pair of high-frequency vibrators and a pair of low-frequency vibrators for vibrating the mirror. The high-frequency vibrators include a substrate, a bottom electrode layer formed on the substrate, a piezoelectric layer, and a drive electrode and a first monitor electrode as the top electrode layer. One end of the low-frequency vibrator has the substrate shared with the high-frequency vibrator, a bottom electrode layer, a piezoelectric layer, a drive electrode, and a second monitor electrode as the top electrode layer. The other end of the low-frequency vibrator has the substrate shared with the high-frequency vibrator, a bottom electrode layer, a piezoelectric layer, a drive electrode, a first monitor electrode, and an insulator layer as a dead zone for preventing a piezoelectric effect due to the piezoelectric layer from reaching the first monitor electrode. The first monitor electrode provided on the low-frequency vibrator is connected from the top of the vibrator to an extraction electrode.

A lens unit includes a first lens () and a second lens () housed in a holder () which may improve aberration. The first lens () is cylindrical having a top that functions as a lens (), and the second lens () is pressed into the cylindrical portion () of the first lens () having a top in such a manner that the inner periphery of the cylindrical portion () of the first lens () is pressed by the outer periphery of the second lens ().

Lens unit and electronic apparatus using same

The apparatus for producing glass beads of the present invention comprises a melting potfor heating and melting glass, a nozzleA for dripping molten glassin the melting pot, which is disposed at the bottom of the melting pot, and a liquid glass droplet receiverfilled with cooling solutionfor cooling the liquid glass dropletdripped from the nozzleA, which is disposed under the nozzleA, wherein the cooling solutionis made from a material that forms a bubble layer around the liquid glass dropletas the cooling solutionis vaporized due to the heat of the liquid glass dropletduring a period when the liquid glass dropletis cooled down to a temperature lower than the glass transfer temperature in the cooling solution

Process for producing spherical glass

Glass can have a high thermal expansion coefficient when it is made up of SiO, BO, NaO, KO, MgO and AlO; contains a partial crystal; and has a mean linear expansion coefficient not lower than of 125&#xd7;10Kin a temperature range of 50&#xb0; C. to 150&#xb0; C. Using this glass as a substrate for a multilayer film filter can fully reduce temperature fluctuations in the filter properties.

Glass for multilayer film filter and method for manufacturing the glass

An optical waveguide comprising claddingand core segmentburied in claddingand serving as a waveguide, wherein a combination of glass material constituting the core segmentand another glass material constituting the claddingis so selected that an absolute value of difference in coefficient of thermal expansion between these materials (&#x3b1;1-&#x3b1;2) is within a range of 0 and 9&#xd7;10&#xb0; C., where &#x3b1;1 denotes a coefficient of thermal expansion of the former material and &#x3b1;2 denotes that of the latter material. Since this makes possible to bond directly the glass materials having different refraction factors and different coefficients of thermal expansion, and to produce the optical waveguide at even a lower temperature as compared to the prior art method as an upper cladding layer is formed with the sputtering method, it realizes reduction in number of processes and time of manufacture, thereby providing the optical waveguide of low transmission loss at low cost, as well as a method of manufacturing the same.

Optical waveguide and method for fabricating the same

A mold lens glass including B O , SiO , La O , ZnO, BaO, and CaO, wherein the components in the composition are present in a weight ratio: of B O (25% to 35% by weight), SiO (1% to 7% by weight), wherein the total amount of B O and SiO is 30% to 40% by weight. La O is present in an amount of 12% to 20% by weight, and the total amount of ZnO, BaO and CaO is 40% to 55% by weight. By using the mold lens glass of the present invention, it is possible to obtain a mold lens glass having a high refractive index, excellent water resistance, and a stable glassy state.

Growing community of inventors

Osaka, Japan

Shigeo Furukawa