Abstract: The purpose of present inventions is to provide an optical control device having a single-mode waveguide in the optical control device having the ridge waveguide, and to stably manufacture and provide the optical control device having the single-mode waveguide with high precision even when the substrate is a thin plate with the thickness of 10 ?m or less. An optical control device having a substrate 1 formed with an optical waveguide, in which the substrate is a thin plate with a thickness of 10 ?m or less, at least a portion of the optical waveguide is configured as a ridge waveguide 21, a trench 20 having a width of 10 ?m or less is formed on both sides of at least portions of the ridge waveguide, and a taper waveguide section (area B) continuously changes a light propagation mode of the waveguide between a single-mode and a multi-mode by continuously changing the width or depth of the trench.

Abstract: It is an object of the invention to provide an optical modulator in which a connection substrate or a terminal substrate is disposed outside an optical modulation element and which can maintain at a proper voltage amplitude value a modulation signal applied to an optical modulation element. An optical modulator includes: a substrate having electro-optic effect; an optical waveguide formed on the substrate; an optical modulation element 1 having a modulation electrode (which includes a signal electrode 2) for modulating light passing through the optical waveguide; and a connection substrate 20 disposed outside the substrate to supply a modulation signal for driving the optical modulation element to the optical modulation element.

Abstract: A circulation conveyor for foods and drinks effectively controls internal temperature of a tunnel section covering an upper portion of a circulation-type conveyor path for foods and drinks. The conveyor has a tunnel section covering an upper portion of and in the longitudinal direction of the carrying path. A cooling and heating pipe 24 inside the tunnel section in its longitudinal direction controls internal temperature of the tunnel section. In the tunnel section, upper and lower ventilation openings 32 and 33, disposed above and below, respectively, of the cooling and heating pipe 24 are provided. The ventilation openings communicate via communication pipes 30a to 30c to circulate air, and an air blowing section 34 circulates air in the tunnel section by drawing air from one of the upper or lower ventilation openings, into the pipes, and discharges the air from the other opening.

Abstract: A multiple part pick for engaging strings of a stringed musical instrument has a first part with a first blade for engaging the strings, a second part having a second blade for engaging the strings, and means for slidable connection between the first part and the second part for relative movement between the two parts. The blades of the two parts are mounted for a relative sliding movement accomplished by relative movement of the musician's fingertips, so that a musician can selectively choose which blade to use to engage with the strings without interrupting a musical performance. Different playing qualities among the blades allow the musician to produce different sound qualities without interrupting performance. In additional embodiments, added optional features include a third blade, a holder part, or a peg and channel feature, to keep parts from disengaging with one another during performance, or a gripping portion to prevent slippage.

Abstract: An optical axis tilting device for laser optical system is configured to include a lens barrel in which a laser optical system is disposed; a tilt frame provided with a tilt sensor, a tilt mechanism including a drive motor, a threaded shaft, a movable member, and a position detector; a leveling mechanism; a ball joint mechanism including a ball support portion in the lens barrel, a ball portion made of a magnetic material and supported between the ball support portion and the tilt frame, a conical recess formed in one of the ball support portion and the tilt frame, and a permanent magnet provided in the one of the ball support portion and the tilt frame; and a computing portion.

Abstract: A time difference measuring device can accurately measure a time difference between two pulse signals generated with a predetermined time difference by measuring the two pulse signals by one measurement. The time difference measuring device measures a time difference between a start signal (M1) and a stop signal (M2). The device has a reference signal generation unit (41) for generating two reference signals (S1, S2) having a ?/2 phase difference. According to corresponding amplitude values (A11, A12) and (A21, A22) of the reference signals (S1, S2) at each generation timing of the start signal (M1) and the stop signal (M2), a phase difference detection unit (42) calculates a phase difference ?? (=?stop??start) between the generation timings of the pulse signals (M1, M2). According to the detected phase difference ?? and the cycle (Ts) of the reference signals (S1; S2), a time difference calculation unit (44) calculates the generation time difference ?t between the pulse signals (m1, M2).

Abstract: The present invention purposes to provide a THz-wave generator capable of generating a THz-wave stably and efficiently, and particularly, to provide the THz-wave generator which is stable against a frequency shift of a laser source and which can easily vary the frequency of the THz-wave. A THz-wave generator, for inputting a laser beam from a light source unit A including a laser source to a THz-wave generating element D, and generating a THz-wave (fT) from the THz-wave generating element, wherein a light circulating unit including an SSB optical modulator, and wavelength selecting means C are disposed between the laser source A and the THz-wave generating element D, the laser beam is guided into the light circulating unit, a specific wavelength lightwave is selected out of lightwaves having a plurality of wavelengths generated in the light circulating unit by the wavelength selecting means, and the specific wavelength (f0, fn) lightwave is input to the THz-wave generating element.

Abstract: In a THz wave generator for generating a THz wave from a THz wave generating element by inputting a plurality of laser beams having different wavelengths to the THz wave generating element, all of the plurality of laser beams are formed into a pulse beam by the pulse generator and the pulse beam is amplified by a single optical amplifier E to which the laser beams are inputted with polarization planes of the laser beams being controlled, and then the pulse beam is inputted to the THz wave generating element F. Preferably, the plurality of laser beams having different wavelengths are generated by inputting single wavelength beam to a multi wavelength generator from single mode laser light source and by inputting light waves having a plurality of wavelengths generated from the multi wavelength generator to wavelength selecting means.

Abstract: An apparatus for processing a chamfering of an eyeglass lens, including means for inputting a width of the chamfering and a range of the chamfering from a periphery of a lens shape at at least one position adjacent to a nose or far away from the nose, arithmetic control means for obtaining a trace for the chamfering on a refractive surface of the eyeglass lens and obtaining the position of the edge end of the eyeglass lens after the processing of the chamfering, and means for displaying the trace of the chamfering by overlapping the lens shape.

Abstract: A method for processing a chamfering of an eyeglass lens, including the steps of inputting a width of the chamfering and a range of the chamfering from a periphery of a lens shape at a position adjacent to a nose and/or a position far away form the nose, obtaining a trace of the chamfering on a refractive surface of the eyeglass lens and displaying the trace of the chamfering by overlapping the lens shape.

Abstract: An optical axis tilting device of a laser optical system, includes a lens barrel inside of which provided with a laser optical system; a tilt frame supported at the lens barrel; a tilt sensor which is provided at the tilt frame and is configured to detect a preset reference position of the tilt frame; a fixed frame fixed to the lens barrel and provided with a tilting mechanism which tilts the tilt frame relative to a horizontal plane; a leveling mechanism which supports the lens barrel tiltably, and tilts the lens barrel so as to detect the reference position by the tilt sensor and then levels the tilt frame; a feed screw which is rotatably driven by a driving motor; a feed piece which is reciprocated by the feed screw and engages with the tilt frame and tilts the tilt frame relative to the reference position; a piece position detection device configured to detect a position of the feed piece; and a computing device configured to calculate a tilting angle based on the position of the feed piece detected by th

Abstract: A jig mounting apparatus has a detection optical system that detects reference marker of an eyeglass lens, is configured so as to determine an mounting point based on the reference marker detected by the detection optical system and position the mounting center of jig, which is used in processing the eyeglass lens, on the mounting point to mount the jig on the surface of the eyeglass lens, in which the detection optical system includes: a focusing optical system that focuses a light-emitting optical flux from a light source on the surface of the eyeglass lens, where hidden marks are formed, via an aperture stop; a reflection plate that reflects an optical flux focused by the focusing optical system and passed through the eyeglass lens; and an imaging device that is provided on a position optically approximately conjugate with the aperture stop and configured to focus on a space portion along an optical axis direction from the surface of the eyeglass lens.

Abstract: Disclosed is equipment for measuring a silicon concentration in a phosphoric acid solution under use as an etching solution during operation of a semiconductor substrate processing system. The equipment is provided with at least a reaction tank and a concentration-measuring tank. The reaction tank includes a reaction unit for adding hydrofluoric acid to a predetermined constant amount of the phosphoric acid solution drawn out of the semiconductor substrate processing system to form a silicon fluoride compound and then causing the silicon fluoride compound to evaporate. The concentration-measuring tank comprises a hydrolysis unit for bubbling the silicon fluoride compound, which has evaporated from the reaction tank, through deionized water to hydrolyze the silicon fluoride compound and a measurement unit for determining a change rate of silicon concentration in the deionized water subsequent to the bubbling.

Abstract: A nested modulator is provided where the circuit arrangement of modifying electrodes including signal electrodes is simplified, and at the same time, the drive voltage can be lowered.

Abstract: In a cutting machine (1) with cutting heads or rollers (7) rotationally mounted on a pivotable cutting arm (6), including a loading ramp or a conveyor (9) extending in the direction to the mine face for receiving and removing the cut material, wherein the cutting arm (6) is mounted on a carriage (4) displaceable on guides extending in the longitudinal direction of the machine, the carriage (4) carries guide rods (12) extending in the longitudinal direction of the machine and engaging in tubular guides (13) of the machine frame (3) carrying a chassis (2).

Abstract: A light emitting diode includes a substrate tilted toward first and second directions simultaneously, a first cladding layer formed with a semiconductor material of a first conductive type on the substrate, an active layer formed on the first cladding layer, and a second cladding layer formed with a semiconductor material of a second conductive type on the active layer, wherein concavo-convexes are formed on the interfaces of the first cladding layer, the second cladding layer, and the active layer, and the (100) substrate is a III-V or a IV-IV group semiconductor substrate, and has a crystal orientation such that a (100) plane of the (100) substrate is inclined 2 to 20° toward the [0-1-1] direction and 1 to 8° toward the [0-11] direction.

Abstract: In a device for oxidizing, reducing, calcining, sintering or melting dusts such as, e.g., furnace or steel dusts, marl and lime dust mixtures, shredder light fractions, mineral dusts such as, e.g., glass dusts, cement kiln bypass dusts, dry sewage sludge, paper slurries or oil-containing grinding dust suspensions, using a dosing cyclone into which the dusts are charged and to which a tangential connector for feeding carrier gases is connected, and a combustion chamber following the dosing cyclone in the axial direction, wherein fuel and optionally additional carrier gas are injected into the combustion chamber coaxially with the discharge opening of the cyclone, a lance is arranged in the interior of the dosing cyclone, coaxially with the discharge opening of the dosing cyclone, for the introduction of liquid substances, substances dissolved in liquids or suspended in gases, or gaseous oxidizable substances and, in particular, fuels.

Abstract: A device for locking end positions of switch parts, having two parts, relatively axially displaceable and positively coupled in at least one direction, including a tube and a rod guided within the tube, at least partially arranged in an outer tube. Locking members cooperate with the parts and outer tube and are displaceable into a locking position in the outer tube's recess. Locking members include ring segments chamfered on insides forming first abutment surfaces converging obliquely toward rod axis. First abutment surfaces cooperate with oblique counter abutment surfaces in a rod recess for holding the rod and the tube coupled during the rod's first displacement path and for urging segments outwardly to emerge from rod recess, and to slide onto the rod's outer surface adjacent rod recess and to immerse into locking position in the outer tube's recess upon rod movement relative to the tube over a second displacement path.