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    • 21. 发明授权
    • Optical device, control method of optical device, and image forming apparatus
    • 光学装置,光学装置的控制方法和成像装置
    • US08665302B2
    • 2014-03-04
    • US13230072
    • 2011-09-12
    • Hidetoshi YamashitaNaoto Watanabe
    • Hidetoshi YamashitaNaoto Watanabe
    • B41J2/435
    • B41J2/473G02B26/127G03G15/04072G03G15/0435G06K15/1214G06K15/129
    • An optical device includes: an irradiation unit that irradiates a part of laser beams output from a light source as a scan beam onto an irradiation target and outputs the remaining part of the laser beams as a monitor beam used to monitor a light amount of the laser beams; a measurement unit that measures a light amount of the monitor beam; a storage unit that stores a plurality of measurement results obtained by the measurement unit when the laser beams are output in a plurality of different light amounts, and the plurality of the different light amounts associated with each other; and a prediction unit that predicts the light amount of the monitor beam relative to a reference light amount of the laser beam using a plurality of the light amounts stored in the storage unit and the measurement results corresponding to the plurality of the light amounts.
    • 光学装置包括:照射单元,其将从光源输出的一部分激光束作为扫描光束照射到照射目标上,并将其余部分的激光束作为用于监测激光的光量的监视光束 梁; 测量单元,其测量监视光束的光量; 存储单元,其存储当以多种不同的光量输出所述激光束时由所述测量单元获得的多个测量结果,以及所述多个不同的光量彼此相关联; 以及预测单元,其使用存储在存储单元中的多个光量和与多个光量相对应的测量结果,相对于激光束的参考光量来预测监视光束的光量。
    • 27. 发明授权
    • Optical device, image forming apparatus, and method for controlling optical device
    • 光学装置,图像形成装置以及光学装置的控制方法
    • US08654170B2
    • 2014-02-18
    • US13448592
    • 2012-04-17
    • Hidetoshi Yamashita
    • Hidetoshi Yamashita
    • B41J2/435B41J2/385
    • G03G15/043G03G15/5037G03G21/0094H01S5/0683
    • An optical device includes a drive unit configured to drive a light source that outputs a laser beam; a detecting unit configured to detect the laser beam output from the light source; a converting unit configured to convert an output of the detecting unit into a value within a predetermined range; and a control unit configured to control the drive unit to switch a light quantity of the laser beam output from the light source from a first light quantity within an imaging light quantity range for forming an image to a second light quantity outside the imaging light quantity range, or vice versa. The converting unit converts an upper limit light quantity in the imaging light quantity range into a maximum value in the predetermined range, and converts a lower limit light quantity in the imaging light quantity range into a minimum value in the predetermined range.
    • 光学装置包括被配置为驱动输出激光束的光源的驱动单元; 检测单元,被配置为检测从所述光源输出的激光束; 转换单元,被配置为将检测单元的输出转换成预定范围内的值; 以及控制单元,被配置为控制所述驱动单元将从所述光源输出的所述激光束的光量从用于形成图像的成像光量范围内的第一光量切换到所述成像光量范围外的第二光量 , 或相反亦然。 转换单元将成像光量范围中的上限光量转换为预定范围内的最大值,并将成像光量范围中的下限光量转换为预定范围内的最小值。
    • 29. 发明授权
    • Optical writing device and optical writing method
    • 光学写入设备和光学写入方法
    • US08294745B2
    • 2012-10-23
    • US12859859
    • 2010-08-20
    • Hidetoshi Yamashita
    • Hidetoshi Yamashita
    • B41J2/385B41J2/435H01S3/13
    • B41J2/473
    • An optical writing device includes a light source that emits multiple laser beams; a separating unit that separates each of the multiple laser beams into a monitor beam and a scanning beam; a photoelectric converting element 218 that outputs a monitor voltage depending on a quantity of the monitor beam; a memory that stores an initial correction value for correcting a set common current; and a microcontroller that calculates a reference current, which is produced by correcting the common current updated on the basis of the monitor voltages with the initial correction values, obtains corrected currents by correcting the common current with the calculated correction values, controls each quantity of the laser beam on the basis of the corrected currents, and determines that the light source is degraded if a ratio of the corrected current to the reference current is larger than a predetermined threshold value.
    • 光学写入装置包括发射多个激光束的光源; 分离单元,其将所述多个激光束中的每一个分离成监视光束和扫描光束; 光电转换元件218,其根据监视光束的量输出监视电压; 存储器,用于存储用于校正设定的公共电流的初始校正值; 以及计算通过校正基于具有初始校正值的监视电压而更新的公共电流产生的参考电流的微控制器,通过用所计算的校正值校正公共电流来获得校正电流,控制每个量的 基于校正电流的激光束,并且如果校正电流与参考电流的比率大于预定阈值,则确定光源劣化。
    • 30. 发明授权
    • Method and apparatus for forming image
    • 用于形成图像的方法和装置
    • US08094178B2
    • 2012-01-10
    • US12125447
    • 2008-05-22
    • Hidetoshi Yamashita
    • Hidetoshi Yamashita
    • B41J2/435B41J2/385G03G13/04
    • G03G15/043G02B26/127G03G15/0435G03G2215/0404
    • In an image forming apparatus, a separating unit separates each laser beam into a first laser beam used for measuring light intensity and a second laser beam used for scanning a photosensitive element, a photoelectric converting unit measures a light intensity of each of the first laser beams and outputs a voltage indicative of the light intensity. A control unit controls a light intensity of each of the laser beams based on a common drive current and a corresponding one of a current correction value, which is set by each of the laser beams to correct a light intensity of a corresponding one of the laser beams based on a corresponding one of the voltages output by the photoelectric converting unit.
    • 在图像形成装置中,分离单元将每个激光束分离成用于测量光强度的第一激光束和用于扫描光敏元件的第二激光束,光电转换单元测量每个第一激光束的光强度 并输出表示光强度的电压。 控制单元基于公共驱动电流和由每个激光束设置的当前校正值中的相应一个来控制每个激光束的光强度,以校正相应激光束中的相应激光束的光强度 基于由光电转换单元输出的电压中的相应一个的光束。