Abstract: An ASK communication device has a carrier signal generator which is connected to a bus line which outputs carrier signals. One of ECUs, which attempts to transmit data, attenuates carrier signals superimposed on the bus line with predetermined timing by use of a transmission switch and a signal attenuator thereby to cause ASK modulation of the carrier signals. Other ECUs receive the ASK-modulated data superimposed on the bus line by use of a receiver, and obtain data by demodulating the ASK-modulated data.

Abstract: A master station includes a main clock generator using a high precision oscillator such as a crystal oscillator or a ceramic oscillator, and generates a carrier signal used for ASK modulation of a transmission signal in response to the clock signal outputted from the main clock generator. A slave station uses sampling means to sample the carrier signal sent from the master station, and generates a carrier signal used for ASK modulation of a transmission signal based on the sampling data.

Abstract: An ASK communication device includes a master station and slave stations connected to the master station through a bus line. The master station includes a transmission unit for ASK-modulating a carrier signal outputted from an oscillation circuit owned thereby and outputting, to a bus line, ID signals of the respective stations and data transmitted to the respective slave stations in a case of transmitting the data from the master station, and outputting the ID signal of the slave station as a transmission source and the carrier signal to the bus line in a case of transmitting the data from the slave station, and a master-side reception unit for receiving, through the bus line, the data transmitted from the slave station. The at least one slave station includes a slave-side reception unit for receiving the data transmitted from the master station and other slave stations, and an attenuation unit for attenuating and ASK-modulating the carrier signal outputted from the master station to the bus line.

Abstract: An ECU monitoring device includes a monitoring ECU connected to a power line for supplying power from a main battery to an immobilizer ECU. The monitoring ECU includes a high-frequency signal generating circuit for superimposing a high-frequency signal on the power line, a high-frequency signal detecting circuit for detecting the high-frequency signal superimposed on the power line and a CPU for judging a connection between the power line and the immobilizer ECU or between the power line and a false instrument. With the constitution, the ECU monitoring device can detect a situation that the immobilizer ECU is detached from a vehicle with high accuracy, preventing the vehicle from being stolen by theft.

Abstract: A semiconductor laser diode optically coupled to an optical fiber, is mounted on a stem. A cap having a light transmissive hole between the optical fiber and the semiconductor laser diode is fixed to the stem. A ball lens is fixed in the light transmissive hole. The ball lens has a refractive index of 1.9 or more and a diameter between 1.5 mm and 2.5 mm.

Abstract: Disclosed are guide apparatus for guiding an advancing continuous fiber bundle, a winding machine having the guide apparatus installed therein, a method for making a bobbin of a continuous fiber bundle, particularly that of carbon fibers, and a carbon fiber bobbin made by using the winding machine; and the guide apparatus comprises: a pair of a first and a second guides disposed on the passage of the fiber bundle, axis lines of which guides are in a relation twisted away from each other in a space, and a parallel guide disposed at the downstream side of the pair of the guides, axis line of which parallel guide is parallel to that of the bobbin, the first guide being a flat or a conical guide, and the second guide being a conical guide.

Abstract: An optical system includes three optical systems. The first has a coupling lens. The second includes a lens having a positive power in a vertical scanning direction and forms the light flux into a line image extending in the horizontal scanning direction on a deflector. The third includes a first lens having a positive power in the horizontal scanning direction, and a second lens having a positive power in the vertical scanning direction. Lateral magnification in the horizontal scanning direction is set larger than that in the vertical scanning direction. Temperature near the first lens is maintained higher than that near the second lens.

Abstract: An optical system includes three optical systems. The first has a coupling lens. The second includes a lens having a positive power in a vertical scanning direction and forms the light flux into a line image extending in the horizontal scanning direction on a deflector. The third includes a first lens having a positive power in the horizontal scanning direction, and a second lens having a positive power in the vertical scanning direction. Lateral magnification in the horizontal scanning direction is set larger than that in the vertical scanning direction. Temperature near the first lens is maintained higher than that near the second lens.

Abstract: An object of a production device and production method for carbon fibers of the present invention is to certainly obtain a connecting portion having a high process passing property with a simple mechanism so as to achieve a continuous operation and improve a firing process operability for achieving a low cost.

Abstract: An optical system includes three optical systems. The first has a coupling lens. The second includes a lens having a positive power in a vertical scanning direction and forms the light flux into a line image extending in the horizontal scanning direction on a deflector. The third includes a first lens having a positive power in the horizontal scanning direction, and a second lens having a positive power in the vertical scanning direction. Lateral magnification in the horizontal scanning direction is set larger than that in the vertical scanning direction. Temperature near the first lens is maintained higher than that near the second lens.

Abstract: An imaging optical system images a one-dimensional image on an image surface by regarding as an object a light modulator element which has light modulator parts arranged one-dimensionally in a first direction, and regarding a bundle of rays from the light modulator element as an object light. The imaging optical system includes at least two anamorphic surfaces each having radii of curvature which are different on an object surface in the first direction and a second direction which is perpendicular to the first direction, so that imaging surfaces in the first and second directions match.

Abstract: A light beam scanning apparatus is provided having a light source for emitting light beams, a first optical unit for optically coupling the light beams, a second optical unit for converging the light beams into an approximately line image elongated along the horizontal scanning direction, a light beam deflector for deflecting the light beams by interaction with reflecting planes, and a third optical unit for converging the light beams deflected by the light beam deflector into a spot of light formed on the surface to be scanned, in which the third optical unit includes first and second anamorphic optical elements, each having a positive power along the horizontal and vertical scanning directions, respectively, and the magnification of the third optical unit is approximately constant and the power of the first anamorphic optical element L1 is also approximately constant irrespective of deflection angle for the light beam scanning.

Abstract: An optical scanning apparatus includes mechanisms for light modulation, light imaging, light deflecting, and light scanning. The light modulation mechanism includes at least one light modulation device including light modulation elements, and is configured to emit modulated light. The light modulation elements are arranged in a single-dimension formation in a first direction orthogonal to a light axis of the modulated light. The light imaging mechanism transfers the modulated light as light of an object to form an image of the object on an image screen. The light deflecting mechanism deflects the light of the object in a direction orthogonal to the first direction and the axis of the light. The light scanning mechanism is disposed on a passage of the deflected light to scan that light.

Abstract: An optical system includes three optical systems. The first has a coupling lens. The second includes a lens having a positive power in a vertical scanning direction and forms the light flux into a line image extending in the horizontal scanning direction on a deflector. The third includes a first lens having a positive power in the horizontal scanning direction, and a second lens having a positive power in the vertical scanning direction. Lateral magnification in the horizontal scanning direction is set larger than that in the vertical scanning direction. Temperature near the first lens is maintained higher than that near the second lens.

Abstract: A light beam scanning apparatus is provided having a light source for emitting light beams, a first optical unit for optically coupling the light beams, a second optical unit for converging the light beams into an approximately line image elongated along the horizontal scanning direction, a light beam deflector for deflecting the light beams by interaction with reflecting planes, and a third optical unit for converging the light beams deflected by the light beam deflector into a spot of light formed on the surface to be scanned, in which the third optical unit includes first and second anamorphic optical elements, each having a positive power along the horizontal and vertical scanning directions, respectively, and the magnification of the third optical unit is approximately constant and the power of the first anamorphic optical element L1 is also approximately constant irrespective of deflection angle for the light beam scanning.

Abstract: An aperture shapes a beam from a light source, a light deflector deflects the beam, and a scanning imaging optical system condenses the deflected beam toward a surface to be scanned so as to form a beam spot on the surface to be scanned. A wavelength &lgr; of the beam emitted by the light source satisfies: 350 (nm)≦&lgr;≦600 (nm), and, a desired diameter &phgr; of the beam spot and the wavelength &lgr; satisfy: 0.5 (mm)≦&phgr;2/&lgr;≦6 (mm).

Abstract: An optical scanning device includes a scanning optical system scans an image surface in a main scanning direction by focusing a deflected light beam onto the image surface as a beam spot, the scanning optical system providing an amount of linearity at an outer peripheral end of the image surface. An optical writing unit controls ON/OFF state of a light source in accordance with an image signal. A frequency dividing unit generates a secondary frequency of a pixel clock, which is equal to an initial frequency of the pixel clock divided by an integer. An electrical correction unit adjusts the secondary frequency of the pixel clock with respect to each of respective pixels included in the image signal, when the beam spot is located near the outer peripheral end of the image surface, so as to obtain uniform-velocity characteristics.

Abstract: A multi-beam scanning apparatus performs image scanning by emitting multiple beams from a plurality of light sources, which beams are deflected by a common deflector at equiangular velocity. The beams are then condensed by a common scanning image forming lens so as to form optical spots on a scanning surface. As a result, the plurality of lines are simultaneously scanned by the beams on the scanning surface at a substantially constant velocity. Characteristics of the light sources, such as the wavelength thereof, and other factors such as writing density and desired writing width of a writing line, are arranged to eliminate differences in a written vertical line in a sub scanning direction caused by a magnification difference, regardless of the cause of such differences. In addition, the modulation frequency of the plurality of light sources is made different from each other so that writing widths of the dots written by the plurality of light sources become the same.

Abstract: An aperture shapes a beam from a light source, a light deflector deflects the beam, and a scanning imaging optical system condenses the deflected beam toward a surface to be scanned so as to form a beam spot on the surface to be scanned. A wavelength &lgr; of the beam emitted by the light source satisfies: 350 (nm)≦&lgr;≦600 (nm), and, a desired diameter &phgr; of the beam spot and the wavelength &lgr; satisfy: 0.5 (mm)≦&phgr;2/&lgr;≦6 (mm).

Abstract: A multi-beam scanning device includes a plurality of light sources which emit multiple beams. A plurality of coupling lenses couple the multiple beams from the light sources. A converging lens device converts the coupled beams into converging beams, the converging beams being elongated in a direction corresponding to a main scanning direction and converging only in a direction corresponding to a sub-scanning direction, at least two of the converging beams forming a difference angle therebetween. A rotary deflector has a reflection surface rotated about a fixed rotation axis. The reflection surface deflects the converging beams while the reflection surface is rotated. A scanning lens device scans an image surface in the main scanning direction at a substantially uniform velocity by focusing each deflected beam into a beam spot on the image surface.