摘要:
Disclosed is a piezoelectric actuator driving apparatus in which a piezoelectric element used to operate as an electro-mechanical transducer is suitably charged and discharged so that the piezoelectric element can make a predetermined amount of mechanical displacement. In the apparatus, the energy of electric charge causing expansion of the piezoelectric element is controlled by a plurality of pulse signals. Each of these pulse signals acts to store electric charge having a predetermined amount of energy in a capacitor, so that the amount of electric charge stored in the capacitor increases with the increase in the number of the pulse signals. After the total amount of the energy of the electric charge stored in the capacitor attains a predetermined value sufficient to cause expansion of the piezoelectric element, the electric charge stored in the capacitor is supplied to the piezoelectric element. Thus, even when a high speed response and high energy are demanded for controlling the amount of expansion of the piezoelectric element, this demand can be readily dealt with. On the other hand, when the electric charge stored in the piezoelectric element is discharged, voltages applied to the piezoelectric element and the primary and secondary windings of a transformer are controlled so as to prevent deterioration of the piezoelectric element.
摘要:
An imaging device includes: a filter formed of four different filter regions with four different spectral transmittances that three different spectral transmittances having characteristics of a color matching function and a spectral transmittance for extracting metallic black have been linearly transformed thereinto by a linear transformation matrix; and an imaging unit that takes an image of light which has come out from a subject, and has been collected by an optical system, and then has passed through the filter.
摘要:
A laser processing apparatus includes a laser source (11), a spatial phase modulator (13) configured to modulate a phase of a laser beam emitted from the laser source, a synthetic data generator (17) configured to generate synthetic data by combining hologram image data representing a pattern image to be processed with position displacement hologram data for shifting the pattern image to a prescribed position, the synthetic data being input to the spatial phase modulator for the phase modulation of the laser beams, and a focusing optical unit (14) configured to guide the phase-modulated laser beam onto a surface to be processed to reproduce the pattern image on the processed surface.
摘要:
A mark forming method for a moving body is disclosed. The method includes the steps of forming a second material layer, which scatters second wavelength light by being dispersed a first material that has a light absorbing property for first wavelength light therein, on a moving body; irradiating the first wavelength light on a part of the second material layer, making the first material at the part absorb the first wavelength light, and changing a scattering property of the part of the second material layer; and forming a mark whose scattering property for the second wavelength light is different in the part.
摘要:
A drive recorder stores information regarding a dangerous location where a vehicle collision or a dangerous driving situation occurred in the past. When it is determined that the vehicle approaches the dangerous location based on a position signal from a GPS receiver for detecting the present position of the vehicle, a warning is provided to the vehicle driver. According to the warning, the vehicle driver can recognize that the vehicle is approaching the dangerous location where the vehicle collision or the dangerous driving situation occurred in the past.
摘要:
A mark forming method for a moving body is disclosed. The method includes the steps of forming a second material layer, which scatters second wavelength light by being dispersed a first material that has a light absorbing property for first wavelength light therein, on a moving body; irradiating the first wavelength light on a part of the second material layer, making the first material at the part absorb the first wavelength light, and changing a scattering property of the part of the second material layer; and forming a mark whose scattering property for the second wavelength light is different in the part.
摘要:
A moving member includes a first layer that blocks a light having a first wavelength and absorbs or allows transmission of a light having a second wavelength different from the first wavelength. A second layer is provided to absorb the light having the first wavelength and reflect the light having the second wavelength. A third layer is provided to allow transmission of the lights having the first and second wavelengths. The first to third layers are laminated on the moving member in this order.
摘要:
An optical multiplexing/demultiplexing apparatus in which a plurality of optical multiplexing/demultiplexing units operating in different wavelength bands are connected hierarchically. Each of the plurality of optical multiplexing/demultiplexing units includes an input waveguide for receiving wavelength multiplexed optical waves, a filter for separating the wavelength multiplexed optical wave from the input waveguide into a first optical wave in a corresponding operating wavelength band and a second optical wave in the other wavelength bands. Each of the multiplexing/demultiplexing units also includes an AWG optical multiplexer/demultiplexer for separating the first optical wave from the filter into individual optical waves each of a single wavelength, and a branch waveguide for directing the second optical waves from the filter to an input waveguide of a succeeding optical multiplexing/demultiplexing unit.
摘要:
A packaging platform for optically coupling one or more optical waveguides of one or more optical components having the optical waveguide to one or more optical fibers is provided with a reference structure portion for the horizontal and vertical positioning of the optical component. The platform is further provided with one or more fiber positioning portions for inserting and holding the optical fiber and positioning the optical fiber at a position where the optical fiber is optically connected to the optical waveguide. The provided packaging platform and an optical module using the platform can simplify all alignment steps for optical coupling, electrical connection and sealing in the coupling of the optical component and the optical fiber.
摘要:
An opto-electronic hybrid integrated circuit of the present invention satisfy a low-loss optical waveguide function, an optical bench function and a high-frequency electrical wiring function. The circuit includes a substrate such as a silicon substrate, a dielectric optical waveguide part arranged in a recess of the substrate, and an optical device mounting part formed on a protrusion of the substrate. An electrical wiring part is disposed on the dielectric layer. The optical device is mounted on the substrate. An optical sub-module includes the optical device which is possible to mount on the substrate.