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    • 62. 发明申请
    • Beam irradiation device
    • 光束照射装置
    • US20060219875A1
    • 2006-10-05
    • US11393669
    • 2006-03-31
    • Masato Yamada
    • Masato Yamada
    • G06M7/00
    • G01S17/936G01S7/4811G01S7/4817G01S17/42G01S17/48G02B26/0875G02B26/10
    • A DSP control circuit monitors a scan position of laser beams on the target region based on a signal from a PSD. Further, the DSP control circuit measures an amount of laser beams reflected from the target region for each scan position based on a signal from a beam receiving portion. The DSP control circuit compares an amount of reflected beams P0 at a scan position (reference position) on the target region with an amount of reflected beams Pk at a scan position adjacent to the scan position. If Pk/P0 is equal to or smaller than a threshold value Rs, it is determined that the scan position corresponding to the amount of reflected beams Pk is nonuniform in irradiation intensity of the laser beams. The DSP control circuit increases emission intensity plurality of times for the position that is determined to be nonuniform in irradiation intensity of the laser beams. With this, it is possible to make irradiation intensityies of the laser beams uniform over the target region.
    • DSP控制电路基于来自PSD的信号来监视目标区域上的激光束的扫描位置。 此外,DSP控制电路基于来自光束接收部分的信号测量从每个扫描位置的目标区域反射的激光束的量。 DSP控制电路将目标区域上的扫描位置(基准位置)处的反射光束P 0的量与扫描位置相邻的扫描位置处的反射光束Pk的量进行比较。 如果Pk / P 0等于或小于阈值Rs,则确定与激光束的照射强度对应的反射光束Pk的扫描位置不均匀。 DSP控制电路增加激光束的照射强度被确定为不均匀的位置的发射强度多次。 由此,能够使激光的照射强度在目标区域上均匀。
    • 65. 发明授权
    • Light emitting device with double heterostructure
    • 具有双异质结构的发光器件
    • US5323027A
    • 1994-06-21
    • US889372
    • 1992-05-29
    • Masato YamadaTakao Takenaka
    • Masato YamadaTakao Takenaka
    • H01L33/00H01L33/30
    • H01L33/305H01L33/0025
    • In a light emitting device comprising a first clad layer composed of a mixed crystal compound semiconductor of first type conductivity, an active layer composed of a mixed crystal compound semiconductor of first type conductivity which has the mixed crystal ratio required to emit the prescribed wavelength, and a second clad layer composed of a mixed crystal compound semiconductor of second type conductivity which has a mixed crystal ratio equivalent to that of the first clad layer, the active layer is sandwiched by the first and second clad layers and forms the double hetero structure with the first and second clad layers, and the carrier concentration in the first clad layer near the junction with the active layer was made to be 5.times.10.sup.16 cm.sup.-3 or less. The carrier concentration in the active layer is preferably 1.times.10.sup.17 cm.sup.-3 or less, and the carrier concentration in the second clad layer is preferably 5.times.10.sup.16 cm.sup.-3 or more.
    • 在包括由第一类型的导电性的混合晶体化合物半导体构成的第一覆盖层的发光器件中,由具有发射规定波长的混合晶体比的第一导电类型的混晶化合物半导体构成的有源层,以及 由第二导电率的混晶化合物半导体构成的第二覆层,其具有与第一覆层相当的混晶比,有源层由第一和第二覆层夹在第二覆层中,并形成双异质结构 第一和第二包层,并且与有源层的接合点附近的第一包层中的载流子浓度为5×1016 cm -3以下。 活性层中的载流子浓度优选为1×10 17 cm -3以下,第二覆盖层中的载流子浓度优选为5×1016cm-3以上。
    • 68. 发明授权
    • Xerographic printing machine with an improved transfer unit
    • 具有改进转印单元的印刷机
    • US5182605A
    • 1993-01-26
    • US800090
    • 1991-11-29
    • Masato YamadaJunji ShirakawaKazuo Uno
    • Masato YamadaJunji ShirakawaKazuo Uno
    • B65H5/02G03G15/00G03G15/16
    • G03G15/1655
    • A xerographic printing machine with at least two rollers disposed so that their axes are arranged parallel to each other. An endless belt, supported by the rollers, has a volume resistance within the range of 10.sup.9 to 10.sup.14 .OMEGA.cm. A photoreceptor is disposed adjacent to the endless belt. An endless belt charging device is disposed opposed to the photoreceptor in such a way that the endless belt is located between the endless belt charging device and the photoreceptor. An electrostatically charged toner supported on the surface of the photoreceptor is transferred to a print media. A guide member is disposed between the photoreceptor and the roller located upstream of the endless belt as viewed in the advancing direction of the endless belt. The guide device guides the advancing print media to bring the print media into contact with the endless belt.
    • 一种具有至少两个辊子的静电印刷机器,其布置成使得它们的轴线彼此平行地布置。 由辊支撑的环形带的体积电阻在109至1014欧姆厘米的范围内。 感光体邻近环形带设置。 环形带充电装置设置成与感光体相对,使得环形带位于环形带充电装置和感光体之间。 负载在感光体表面上的带静电的调色剂转印到印刷媒体上。 在环形带的前进方向观察时,引导构件设置在感光体和位于环形带上游的辊之间。 引导装置引导前进的打印介质以使打印介质与环形带接触。