公开(公告)号：US20120007933A1

公开(公告)日：2012-01-12

申请号：US13163973

申请日：2011-06-20

Applicant: Hidetoshi YAMASHITA

Inventor： Hidetoshi YAMASHITA

IPC: B41J2/385 ,  H01S3/13

CPC classification number: G03G15/04072 ,  G03G15/043

Abstract: An optical device includes: a light source including a plurality of light emitting spots that output laser beams, respectively; a separating unit that separates each of the laser beams output from the plurality of light emitting spots into a monitor beam and a scanning beam; a light-quantity measuring unit that measures a light quantity of the monitor beam; a storage unit in which respective drive currents with which the plurality of light emitting spots of the light source output a prescribed light quantity of laser beams are stored in advance; a light-source control unit that drives the light source with the drive currents stored in the storage unit and causes the plurality of light emitting spots to output the laser beams; and a determining unit that determines whether the light source operates properly on the basis of the light quantity measured by the light-quantity measuring unit.

Abstract translation: 光学装置包括：分别输出激光束的多个发光点的光源; 分离单元，将从多个发光点输出的每个激光束分离成监视光束和扫描光束; 测量监视光束的光量的光量测量单元; 存储单元，其中预先存储光源的多个发光点输出预定光量的激光束的各个驱动电流; 光源控制单元，其利用存储在存储单元中的驱动电流来驱动光源，并使多个发光点输出激光束; 以及确定单元，其基于由所述光量测量单元测量的光量来确定所述光源是否正常工作。

公开(公告)号：US20110032323A1

公开(公告)日：2011-02-10

申请号：US12845368

申请日：2010-07-28

Applicant: Hidetoshi YAMASHITA ,  Norihiro Yamamoto

Inventor： Hidetoshi YAMASHITA ,  Norihiro Yamamoto

IPC: B41J2/435

CPC classification number: H04N1/1135 ,  H04N1/06 ,  H04N1/40056 ,  H04N2201/0471 ,  H04N2201/04729 ,  H04N2201/04732 ,  H04N2201/04744

Abstract: An image forming apparatus includes a light source that emits light beam; an illumination-current generating unit that generates an illumination current that causes the light source to emit the light beam; a deflecting optical unit, thereby forming a light spot and scanning the scanned surface; a detecting unit that detects a scanning position of the light spot on the scanned surface; a control unit that calculates a relation between a value of the illumination current and an intensity of light based on a plurality of intensities of emitted light, each intensity of the plurality of intensities being close to or equal to a prescribed light intensity, and causes the illumination-current generating unit to generate the illumination current based on the relation.

Abstract translation: 图像形成装置包括发射光束的光源; 照明电流产生单元，其产生使光源发光的照明电流; 偏转光学单元，从而形成光点并扫描扫描表面; 检测单元，其检测所述扫描面上的所述光点的扫描位置; 控制单元，其基于多个发光强度来计算照明电流的值与光强度之间的关系，所述多个强度的每个强度接近或等于规定的光强度，并且使得 照明电流产生单元，用于基于该关系产生照明电流。

公开(公告)号：US20110001788A1

公开(公告)日：2011-01-06

申请号：US12828703

申请日：2010-07-01

Applicant: Norihiro YAMAMOTO ,  Hidetoshi YAMASHITA

Inventor： Norihiro YAMAMOTO ,  Hidetoshi YAMASHITA

IPC: B41J2/435

CPC classification number: G03G15/043 ,  G03G15/0435 ,  G03G15/326

Abstract: An image forming apparatus includes a light source that outputs a plurality of laser beams and a control unit that adjusts the light intensity of each of the laser beams. The control unit calculates a correction value so that, when the laser beam is driven by a control value calculated by correcting a common control value using the correction value and adding a threshold to the corrected control value, the light intensity of the laser beam is equal to a target light intensity. The threshold is calculated so that, when the laser beam is driven by a control value calculated by multiplying the corrected control value by a predetermined factor, and adding the threshold to the multiplied control value, the light intensity of the laser beam is equal to the target light intensity multiplied by the predetermined factor.

Abstract translation: 图像形成装置包括输出多个激光束的光源和调整每个激光束的光强度的控制单元。 控制单元计算校正值，使得当通过使用校正值校正公共控制值而计算的控制值来驱动激光束并且将校正控制值加上阈值时，激光束的光强度相等 达到目标光强度。 计算阈值，使得当激光束被通过将校正的控制值乘以预定因子而计算的控制值驱动并且将相加的控制值相加时，激光束的光强度等于 目标光强乘以预定因子。

公开(公告)号：US20110043594A1

公开(公告)日：2011-02-24

申请号：US12859859

申请日：2010-08-20

Applicant: Hidetoshi YAMASHITA

Inventor： Hidetoshi YAMASHITA

IPC: B41J2/435

CPC classification number: B41J2/473

Abstract: 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.

Abstract translation: 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。

公开(公告)号：US20100150591A1

公开(公告)日：2010-06-17

申请号：US12561748

申请日：2009-09-17

Applicant: Hidetoshi YAMASHITA

Inventor： Hidetoshi YAMASHITA

IPC: G03G15/043 ,  G02B27/10

CPC classification number: B41J2/473 ,  G02B26/123 ,  G03G15/0435 ,  G03G15/326 ,  H04N1/40037 ,  H04N1/4005

Abstract: A first beam splitter splits each laser beam into a first beam and a second beam. A deflecting unit deflects a direction of the second beam. A second beam splitter splits the second beam into multiple split beams. A first photoelectric converting unit measures intensity of the first beam and outputs first voltage. A second photoelectric converting unit measures intensity of each split beam and outputs second voltage. A control unit updates a driving-current correction value using the first voltage and the second voltage, corrects a driving current, and controls intensity of the laser beam based on corrected driving current.

Abstract translation: 第一分束器将每个激光束分成第一光束和第二光束。 偏转单元偏转第二光束的方向。 第二分束器将第二光束分成多个分束。 第一光电转换单元测量第一光束的强度并输出第一电压。 第二光电转换单元测量每个分束的强度并输出第二电压。 控制单元使用第一电压和第二电压来更新驱动电流校正值，校正驱动电流，并且基于校正的驱动电流来控制激光束的强度。

公开(公告)号：US20120069128A1

公开(公告)日：2012-03-22

申请号：US13230072

申请日：2011-09-12

Applicant: Hidetoshi YAMASHITA ,  Naoto Watanabe

Inventor： Hidetoshi YAMASHITA ,  Naoto Watanabe

IPC: B41J2/435 ,  H05B37/02

CPC classification number: B41J2/473 ,  G02B26/127 ,  G03G15/04072 ,  G03G15/0435 ,  G06K15/1214 ,  G06K15/129

Abstract: 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.

Abstract translation: 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，并将剩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相应于多个光量的测量结果来预测监视光束的光量相对于激光束的参考光量。

公开(公告)号：US20120275476A1

公开(公告)日：2012-11-01

申请号：US13448592

申请日：2012-04-17

Applicant: Hidetoshi YAMASHITA

Inventor： Hidetoshi YAMASHITA

IPC: H01S3/10

CPC classification number: G03G15/043 ,  G03G15/5037 ,  G03G21/0094 ,  H01S5/0683

Abstract: 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.

Abstract translation: 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。

公开(公告)号：US20120269213A1

公开(公告)日：2012-10-25

申请号：US13444309

申请日：2012-04-11

Applicant: Hidetoshi YAMASHITA

Inventor： Hidetoshi YAMASHITA

IPC: H01S3/10

CPC classification number: H01S5/0683 ,  G06K15/1214 ,  H01S5/0617

Abstract: An optical device includes: a light source that emits laser beams; a detecting unit that detects the laser beams and converts light amounts of the detected laser beams into voltage values; a first storage unit that stores in advance a light amount to be output for each of the laser beams and the voltage value; a second storage unit that stores in advance a value indicating light use efficiency of an optical system that guides the laser beams to a surface to be scanned for scanning; a calculating unit that calculates a target voltage value for each of the laser beams based on the light amount and the voltage value and also on the value indicating the light use efficiency; and a control unit that controls emission power for each of the laser beams so that the voltage value output from the detecting unit approaches the target voltage value.

Abstract translation: 光学装置包括：发射激光束的光源; 检测单元，其检测激光束并将检测到的激光束的光量转换为电压值; 第一存储单元，预先存储针对每个激光束输出的光量和电压值; 第二存储单元，其预先存储指示将激光束引导到要扫描的表面进行扫描的光学系统的光使用效率的值; 计算单元，其基于光量和电压值计算每个激光束的目标电压值，并且还基于表示光使用效率的值; 以及控制单元，其控制每个激光束的发射功率，使得从检测单元输出的电压值接近目标电压值。

公开(公告)号：US20100066799A1

公开(公告)日：2010-03-18

申请号：US12404477

申请日：2009-03-16

Applicant: Hidetoshi YAMASHITA

Inventor： Hidetoshi YAMASHITA

IPC: B41J2/47

CPC classification number: G03G15/043 ,  B41J2/473 ,  G02B26/123 ,  G03G15/0435 ,  G03G2215/0404

Abstract: An image forming apparatus includes a light source; a separating unit that separates a laser beam emitted from the light source into a first laser beam and a second laser beam; a first photoelectric converting unit that measures a light intensity of the first laser beam and outputs a first voltage depending on the light intensity of the first laser beam; a second photoelectric converting unit that measures a light intensity of the second laser beam, and outputs a second voltage depending on the light intensity of the second laser beam; and a control unit that executes a first light-intensity correction for correcting the light intensity of the second laser beam based on a current correction value and a drive current. The current correction value being a value used for correcting a light intensity of the laser beam based on the first voltage and the second voltage, and the drive current being a current preliminarily-set with respect to the laser beam to cause the light source to emit the laser beam.

Abstract translation: 图像形成装置包括光源; 分离单元，其将从所述光源发射的激光束分离成第一激光束和第二激光束; 第一光电转换单元，其测量第一激光束的光强度并输出取决于第一激光束的光强度的第一电压; 第二光电转换单元，其测量第二激光束的光强度，并且输出取决于第二激光束的光强度的第二电压; 以及控制单元，其基于当前校正值和驱动电流执行用于校正第二激光束的光强度的第一光强度校正。 当前校正值是用于基于第一电压和第二电压来校正激光束的光强度的值，并且驱动电流是关于激光束预先设定的电流，以使光源发射 激光束。

公开(公告)号：US20090190943A1

公开(公告)日：2009-07-30

申请号：US12358665

申请日：2009-01-23

Applicant: Hidetoshi YAMASHITA

Inventor： Hidetoshi YAMASHITA

IPC: G03G15/043

CPC classification number: G03G15/043 ,  G03G15/0435 ,  G03G15/326

Abstract: An image forming apparatus includes a light source that emits a laser beam; a separating unit that separates the laser beam emitted from the light source into a first laser beam for measuring a light intensity and a second laser beam for scanning a photosensitive element to form image data; a first photoelectric converting unit that measures a light intensity of the first laser beam, and outputs a first voltage depending on the light intensity of the first laser beam; a second photoelectric converting unit that measures a light intensity of the second laser beam, and outputs a second voltage depending on the light intensity of the second laser beam; and a control unit that executes a first light-intensity correction for correcting the light intensity of the second laser beam per scan by each scanning line and a second light-intensity correction for adjusting a performance in forming the image data based on a current correction value for correcting a light intensity of the laser beam based on the first voltage and the second voltage and a drive current preliminarily-set with respect to the laser beam to cause the light source to emit the laser beam.

Abstract translation: 图像形成装置包括发射激光束的光源; 分离单元，将从光源发射的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以形成图像数据的第二激光束; 第一光电转换单元，其测量第一激光束的光强度，并且输出取决于第一激光束的光强度的第一电压; 第二光电转换单元，其测量第二激光束的光强度，并且输出取决于第二激光束的光强度的第二电压; 以及控制单元，其执行用于校正每个扫描线的每次扫描的第二激光束的光强度的第一光强度校正和用于基于当前校正值来调整形成图像数据的性能的第二光强度校正 用于基于第一电压和第二电压校正激光束的光强度，以及相对于激光束预先设定的驱动电流，以使光源发射激光束。