| Patent application number | Description | Published |
|---|
| 20080224571 | PIEZOELECTRIC ELEMENT, LIQUID JET HEAD AND PRINTER - A piezoelectric element includes: a base substrate; a lower electrode formed above the base substrate; a piezoelectric layer that is formed above the lower electrode, and formed from a perovskite type oxide; and an upper electrode formed above the piezoelectric layer, wherein the piezoelectric layer is oriented to (100) crystal orientation in the pseudo-cubic crystal expression, and a crystal of the perovskite type oxide in a direction parallel to a lower surface of the piezoelectric layer has a lattice constant greater than a lattice constant of the crystal of the perovskite type oxide in a direction orthogonal to the lower surface of the piezoelectric layer. | 09-18-2008 |
| 20080308525 | POTASSIUM NIOBATE DEPOSITED BODY AND METHOD FOR MANUFACTURING THE SAME, PIEZOELECTRIC THIN FILM RESONATOR, FREQUENCY FILTER, OSCILLATOR, ELECTRONIC CIRCUIT, AND ELECTRONIC APPARATUS - A method for manufacturing a potassium niobate deposited body includes: forming a buffer layer above a substrate composed of an R-plane sapphire substrate; forming above the buffer layer a potassium niobate layer or a potassium niobate solid solution layer that epitaxially grows in a (100) orientation in a pseudo cubic system expression; and forming an electrode layer above the potassium niobate layer or the potassium niobate solid solution layer, wherein a (100) plane of the potassium niobate layer or the potassium niobate solid solution layer is formed to tilt with a [11-20] direction vector as a rotation axis with respect to an R-plane (1-102) of the R-plane sapphire substrate. | 12-18-2008 |
| 20090174489 | ATOMIC OSCILLATOR - An atomic oscillator that controls an oscillation frequency by using an optical absorption property derived from a quantum interference effect occurring when two kinds of resonance light are made incident as coherent light having different wavelengths from each other, includes an optical system that includes: a gas cell sealing metal atoms in a gas state therein; a coherent light source for supplying the resonance light to the metal atoms being in the gas cell; and a light detector for detecting light transmitted through the gas cell. In the atomic oscillator, a first refraction unit is formed at a light incident side, on which coherent light is made incident, of the gas cell. | 07-09-2009 |
| 20090315629 | ATOMIC OSCILLATOR - An atomic oscillator includes: a gas cell in which a gaseous metal atom is sealed; heating units heating the gas cell to a predetermined temperature and being a first heater and a second heater; a light source of exciting light exciting the metal atom in the gas cell; a light detecting unit detecting the exciting light which has passed through the gas cell; a substrate including at least a temperature controlling circuit for the heating units; a first heater wiring coupling the first heater and the substrate; a second heater wiring coupling the second heater and the substrate; and a third heater wiring coupling the first heater and the second heater. In the atomic oscillator, the gas cell includes a cylindrical portion; and windows which respectively seal openings at both ends of the cylindrical portion and constitute an incident surface and an emitting surface on an optical path of the exciting light. The first heater and the second heater are respectively formed on the windows at an incident surface side and an emitting surface side and made of transparent heating materials. | 12-24-2009 |
| 20100102893 | PHYSICAL SECTION OF ATOMIC OSCILLATOR - A physical section of an atomic oscillator includes at least: a gas cell including a cylindrical portion and first and second windows respectively hermetically-closing openings of both sides of the cylindrical portion to form a cavity in which gaseous metal atoms are sealed; a light reflection unit disposed on the first window; a first heating unit disposed to be closely attached to the second window and heating the gas cell at a predetermined temperature; a light source disposed so as to allow a light emitting part thereof to face the light reflecting unit, emitting excitation light exciting the metal atoms in the gas cell, and provided on a side, which is a reverse side to a side to which the gas cell is provided, of the first heating unit; a light detection unit detecting the excitation light reflected by the light reflection unit and provided also on a side, which is a reverse side to a side to which the gas cell is provided, of the first heating unit; and a Peltier element interposed between the light source and the first heating unit, and between the light detection unit and the first heating unit. | 04-29-2010 |
| 20100201452 | QUANTUM INTERFERENCE DEVICE, ATOMIC OSCILLATOR, AND MAGNETIC SENSOR - 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. | 08-12-2010 |
| 20110057737 | QUANTUM INTERFERENCE DEVICE, ATOMIC OSCILLATOR AND MAGNETIC SENSOR - A quantum interference device for causing an electromagnetically induced transparency phenomenon to occur in an alkali metal atom by a resonant light pair including a first resonant light and a second resonant light, includes: a light source to generate a plurality of the first resonant lights different from each other in frequency by Δω and a plurality of the second resonant lights different from each other in frequency by Δω; a magnetic field generation unit that applies a magnetic field to the alkali metal atom; a light detection unit that detects intensities of lights including the first resonant lights and the second resonant lights passing through the alkali metal atom; and a control unit that controls to cause a frequency difference between the specified first resonant light and the specified second resonant light to become equal to a frequency difference corresponding to an energy difference between two ground levels of the alkali metal atom based on a detection result of the light detection unit, wherein the control unit controls at least one of the frequency Δω and intensity of the magnetic field generated by the magnetic field generation unit to satisfy at least one of 2×δ×n=Δω and Δω×n=2×δ (n is a positive integer) with respect to a frequency δ corresponding to an energy difference between two Zeeman split levels different from each other in magnetic quantum number by one among a plurality of Zeeman split levels generated in each of the two ground levels of the alkali metal atom by energy splitting due to the magnetic field. | 03-10-2011 |
| 20110063037 | ATOMIC OSCILLATOR AND CONTROL METHOD OF ATOMIC OSCILLATOR - An atomic oscillator includes: a gaseous alkali metal atom; a light source to generate a resonant light pair for generating an electromagnetically induced transparency phenomenon in the alkali metal atom; a high frequency generation unit that supplies a high frequency signal to the light source and generates the resonant light pair; a center frequency variable unit that supplies a direct current signal to the light source and varies a center frequency of the resonant light pair; a light detection unit that detects the resonant light pair transmitted through the alkali metal atom and outputs a detection signal corresponding to intensity of the transmitted resonant light pair; an absorption detection unit that detects a minimum value of the detection signal when the center frequency of the resonant light pair is varied; and a signal processing unit that controls supply or stop of the high frequency signal outputted from the high frequency generation unit, wherein the signal processing unit compares the minimum value detected by the absorption detection unit with the detection signal in a state where output of the high frequency signal is stopped, controls the center frequency variable unit to cause the detection signal to become larger than the minimum value by a specified value, and sets the center frequency of the resonant light pair, and the set center frequency is set to be lower than the center frequency of the resonant light pair corresponding to the minimum value. | 03-17-2011 |
| 20110148992 | PIEZOELECTRIC ELEMENT, LIQUID JET HEAD AND PRINTER - A piezoelectric element includes: a base substrate; a lower electrode formed above the base substrate; a piezoelectric layer that is formed above the lower electrode, and formed from a perovskite type oxide; and an upper electrode formed above the piezoelectric layer, wherein the piezoelectric layer is oriented to (100) crystal orientation in the pseudo-cubic crystal expression, and a crystal of the perovskite type oxide in a direction parallel to a lower surface of the piezoelectric layer has a lattice constant greater than a lattice constant of the crystal of the perovskite type oxide in a direction orthogonal to the lower surface of the piezoelectric layer. | 06-23-2011 |
