Abstract: A vibration gyro sensor, including: a vibrating element; a pair of drive electrodes for driving the vibrating element; at least two detection electrodes for detecting Coriolis force applied to the vibrating element; a monitor circuit coupled with one of the pair of the drive electrodes, so as to output a monitor signal; a drive circuit for amplifying the monitor signal so as to output the amplified signal to the other of the pair of drive electrode; a differential amplifier circuit for differentially amplifying at least two signals obtained from the detection electrodes of the vibrating element, so as to output a differential amplified signal; a synchronous detection circuit for synchronously detecting the differential amplified signal with respect to the monitor signal, so as to output a detected signal; a filter circuit for outputting a filtered signal in which a noise of the detected signal is removed; and a ratiometric circuit which receives the filtered signal varied in proportion to a variation of a pow

Abstract: A pressure sensor includes: a housing; a pressure input orifice opened at a pipe sleeve of the housing; a diaphragm sealing the pressure input orifice, the diaphragm having a first surface serving as a pressure receiving surface; a pressure sensitive unit using a direction of detecting a force as a detecting axis. A first end of the pressure sensitive unit is connected to a central area of a second surface of the diaphragm. A second end of the pressure sensitive unit is connected to the housing. The detecting axis is approximately orthogonal to the pressure receiving surface. A circumference of a portion where the central area and the first end of the pressure sensitive unit are in contact with each other is located inside a circumference of the central area. A thickness of the central area is larger than a thickness of an area surrounding the central area.

Abstract: A vibrating element includes: a vibrating body having frequency temperature dependency; and a temperature characteristic correcting part provided on a surface of the vibrating body. The temperature characteristic correcting part has a temperature characteristic of at least one of a Young's modulus and a thermal expansion coefficient and is expressed by a temperature characteristic curve which has at least one of an inflection point and an extremal value. In the vibrating element, a temperature of at least one of the inflection point and the extremal value is within an operating temperature range of the vibrating body.

Abstract: A flexural resonator element includes a base body and a beam with a groove and a through-hole, the beam being extended in a Y direction from the base body and flexurally vibrating in an X direction orthogonal to the Y direction, the groove being formed on a surfaces of the beam perpendicular to a Z direction orthogonal to the X direction and the Y direction, and the through-hole having a smaller width in the X direction than a width of an opening of the groove in the X direction and penetrating from an inner surface of the groove formed on the surface of the beam to a surface of the beam opposite to the surface of the beam having the groove.

Abstract: A resonator element includes: three or more resonating arms, each of the resonating arms including; a lower electrode provided on a first surface of the resonating arm, a piezoelectric film formed on the lower electrode, an upper electrode formed on the piezoelectric film, a first wiring line coupled to the lower electrode, and a second wiring line coupled to the upper electrode; and a base to which the resonating arms are connected. In the resonator element, the resonating arm vibrates in a thickness direction of the resonating arm. The resonating arms adjacent to each other vibrate in opposite directions from each other. The first surface is opposed to a second surface in the thickness direction. The second wiring line is drawn out to the second surface through side surfaces of the resonating arm so as to surround the resonating arm.

Abstract: A quantum interference device includes: gaseous alkali metal atoms; and a light source for causing a resonant light pair having different frequencies that keep a frequency difference equivalent to an energy difference between two ground states of the alkali metal atoms, the quantum interference device causing the alkali metal atoms and the resonant light pair to interact each other to cause an electromagnetically induced transparency phenomenon (EIT), wherein there are a plurality of the resonant light pairs, and center frequencies of the respective resonant light pairs are different from one another.

Abstract: A pressure detection unit includes: a first piezoelectric resonator element having a vibrating portion and a pair of base portions connected to both ends of the vibrating portion; a second piezoelectric resonator element having a resonating arm and a base portion integrated with one end of the resonating arm; a diaphragm having a pair of supporting portions to which the base portions of the first piezoelectric resonator element are bonded; and a base disposed to be opposed to the diaphragm. In the pressure detection unit, the base portion of the second piezoelectric resonator element is joined to one of the base portions of the first piezoelectric resonator element in an identical plane.

Abstract: A piezoelectric resonator includes a piezoelectric resonator element having a base portion and a resonating arm extending from the base portion, a package including a bottom to which the piezoelectric resonator element is fixed and a frame wall that surrounds the bottom and having an opening above the bottom, and a lid for closing the opening of the package. In this piezoelectric resonator, the lid includes a main body having a through-hole formed therein, a flange formed to surround a periphery of the main body and to be thinner than the main body, and an optically transparent member located in the through-hole. The flange has a joining portion with an upper end surface of the frame wall, and the main body projects in a direction from the flange to the bottom in a thickness direction. Also, the through-hole is at a position displaced in a first direction approaching a first end of the main body from a center of the main body.

Abstract: [Problem] To obtain a means for forming a laminated half-wave plate for a triple-wavelength compatible optical pickup device. [Solving Means] A first and a second wave plates using quartz crystal having birefringence are laminated together in such a manner that their optical axes intersect to form a laminated wave plate functioning as a half-wave plate as a whole. Phase differences of the first and the second wave plates relative to an ordinary ray and an extraordinary ray with respect to a predetermined wavelength ? are set to be ?1 and ?2, an order of a high-mode order is set to be a natural number n, whereby the high-order mode laminated half-wave plate is formed so as to satisfy: ?1=180°+360°×n; and ?2=180°+360°×n.

Abstract: A piezoelectric resonator storage case, includes a piezoelectric resonator stored therein, and a resonator container for storing a metal case. Here, the piezoelectric resonator includes: a piezoelectric resonator body having the metal case and a piezoelectric resonator element which is sealed in the metal case in an air tight manner; and two lead terminals protruding from a bottom of the piezoelectric resonator body.

Abstract: A tuning fork type piezoelectric resonator element includes: a base including a pair of cuts provided opposite from each other and a constricted part located between the pair of cuts, a pair of resonator arms extending from the base, and an excitation electrode provided to each of the pair of resonator arms. When the pair of resonator arms vibrate at an inherent resonance frequency fcom of a common mode at which the pair of resonator arms swing in a same direction, a node of the vibration of the common mode is located at the constricted part.

Abstract: A temperature-sensor circuit includes: a transistor having an emitter that is grounded, a collector, and a base; a first resistor having a first end and a second end, the first end being coupled with the collector; and a second resistor having a third end and a fourth end, the third end being coupled with the second end of the first resistor. A junction joining the first resistor and the second resistor is coupled with the base.

Abstract: A flexural vibration element includes: a vibration element body composed of a plurality of vibrating arms provided in parallel, a connecting part connecting the vibrating arms, and one central supporting arm extending between the vibrating arms from the connecting part in parallel with the vibrating arms at equal distance from the arms; and a frame body disposed outside the vibration element body. In the flexural vibration element, the vibration element body is supported by the frame body at an end part, which is opposite to the connecting part, of the central supporting arm.

Abstract: [Problem] In a SAW device using a quartz crystal substrate, prevent the deterioration of Q factor due to the difference in the peak frequency between the radiation conductance of an IDT and the reflection coefficient of a reflector. [Means to Solve the Problem] A surface acoustic wave (SAW) device includes a piezoelectric substrate made of a quartz crystal flat plate where a cut angle of a rotated Y-cut quartz substrate is set in ?64.0°<?<?49.3° with a crystalline Z axis and a propagation direction of the surface acoustic wave is set at 90°±5° with a crystalline X axis, an interdigital transducer (IDT) formed on the piezoelectric substrate and reflectors disposed at both sides of the IDT, wherein an exciting wave is SH wave, an electrode film thickness “H/?” normalized by a wavelength of the IDT is 0.05?H/??0.07 where “?” is a wavelength of the exciting SAW, and a ratio of an electrode pitch between the IDT and the reflector “Lt/Lr” is set to satisfy the following formula: 31.50×(H/?)2?4.

Abstract: A flexural vibration element includes: a plurality of vibrating arms provided in parallel with each other; a connecting part connecting the vibrating arms; and one central supporting arm extending between the vibrating arms from the connecting part in parallel with the vibrating arms at equal distance from the arms. In the flexural vibration element, the connecting part has a groove formed on each of front and rear surfaces thereof, and the groove is provided in an area of the connecting part in which compressive stress and tensile stress due to flexural vibration of the vibrating arms alternately occur at a vibrating arm side and an opposite side of the vibrating arm side, in a width direction of the vibrating arms.

Abstract: A sensor device includes: a sensor component including a package, connection terminals having first terminals on a terminal forming surface of the package, and a sensor element that has a detection axis and is housed in the package; a resin part covering the sensor component; and mounting leads, each of the mounting leads including, a one-end part formed by being folded so as to be coupled to one of the first connection terminals in the resin part so that a main surface of the one-end part and a main surface of the one of the first connection terminals face each other, an intermediate part extending toward a mounting surface of the sensor device from the one-end part, and an other-end part formed by being folded so as to be externally exposed from the resin part.

Abstract: A piezoelectric device includes: a lower substrate; an upper substrate; an intermediate substrate sandwiched between the lower substrate and the upper substrate, the intermediate substrate including: a piezoelectric vibrating portion; a frame surrounding a periphery of the piezoelectric vibrating portion; a connecting portion coupling the piezoelectric vibrating portion and the frame; a first exciting electrode disposed on an upper surface of the piezoelectric vibrating portion; a second exciting electrode disposed on a lower surface of the piezoelectric vibrating portion; a first wiring line electrically coupled to the first exciting electrode; and a second wiring line electrically coupled to the second exciting electrode; and an inside surface coupling an upper surface and a lower surface of the frame and having a slanted surface having an interior angle with respect to one of the upper surface and the lower surface, the angle being 90 degrees or more.

Abstract: An optical element that has a flat plate shape and includes a light entering surface and a light exiting surface substantially parallel with the light entering surface, the element includes a plurality of translucent members, a plurality of optical multilayer films, a plurality of phase plates, and a plurality of plasma polymerized films. The translucent members, the optical multilayer films, the phase plates, and the plasma polymerized films are provided along the light entering surface and the light exiting surface. The translucent members include a plurality of oblique surfaces oblique to the light entering surface and the light exiting surface. Each of the optical multilayer films is formed on some of the oblique surfaces. The optical multilayer film is either one of a polarization separating film and a reflecting film.

Abstract: A voltage control type temperature compensation piezoelectric oscillator, includes: a voltage control type oscillation circuit; an automatic frequency control (AFC) circuit outputting a control voltage for controlling an oscillation frequency of the voltage control type oscillation circuit based on an external control voltage; a temperature compensation voltage generating circuit generating a temperature compensation voltage; and a gain variable circuit varying a gain of the temperature compensation voltage. In the oscillator, the gain variable circuit is controlled by the control voltage outputted from the AFC circuit, and the oscillation frequency of the voltage control type oscillation circuit is controlled by an output voltage of the gain variable circuit.

Abstract: A variable capacitance unit that configures a voltage controlled piezoelectric oscillator including a first variable capacitance diode, a first condenser connected in parallel with the first variable capacitance diode, the second variable capacitance diode, a second condenser inserted and connected between a cathode of the first variable capacitance diode and an anode of the second variable capacitance diode, a third condenser inserted and connected between an anode of the first variable capacitance diode and a cathode of the second variable capacitance diode. The external control voltage is applied to the first variable capacitance diode and the second variable capacitance diode so that respective polarities thereof are reversed.