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1. 发明授权

US06466594B1 Laser modulating device 失效
标题翻译：激光调制装置
公开(公告)号：US06466594B1
公开(公告)日：2002-10-15
申请号：US09669766
申请日：2000-09-26
申请人： Shoji Iwazaki
发明人： Shoji Iwazaki
IPC分类号： H01S313
CPC分类号： H01S5/06835 , G06K15/1214 , H01S5/0427
摘要： A laser modulating device is provided with a monitoring system that outputs a detection voltage signal corresponding to the output power, a minimum output level setting system that outputs a minimum level voltage signal, a modulating voltage signal generating system, a first adder that outputs a reference voltage signal corresponding to a sum of the minimum level voltage signal and the modulating voltage signal, a comparing system that outputs a driving voltage signal corresponding to a difference between the reference voltage signal and the detection voltage signal, a first V/I converting system that converts the driving voltage signal to a first driving current, the first driving current being supplied to the laser diode, a second V/I converting system, and a circuit that directly supplies the modulating voltage signal from the modulating voltage signal generating system to the second voltage to current converting system, the second voltage to current converting system converting the modulating voltage signal into a second driving signal, the second driving signal being supplied to the laser diode.
摘要翻译：激光调制装置具备输出与输出功率对应的检测电压信号的监视系统，输出最低电平电压信号的最小输出电平设定系统，调制电压信号生成系统，输出基准电压信号的第一加法器对应于最小电平电压信号和调制电压信号之和的电压信号;输出对应于参考电压信号和检测电压信号之差的驱动电压信号的比较系统;第一V / I转换系统，将驱动电压信号转换为第一驱动电流，将第一驱动电流提供给激光二极管，第二V / I转换系统和将调制电压信号从调制电压信号生成系统直接供给到第二驱动电压的电路电压到电流转换系统，第二电压到电流转换系统转换将电压信号调制成第二驱动信号，将第二驱动信号提供给激光二极管。

2. 发明授权

US06445401B2 Light power modulating system 失效
标题翻译：光功率调节系统
公开(公告)号：US06445401B2
公开(公告)日：2002-09-03
申请号：US09747968
申请日：2000-12-27
申请人： Shoji Iwazaki
发明人： Shoji Iwazaki
IPC分类号： G03G1504
CPC分类号： H01S5/06832 , G06K7/10584
摘要： In a light power modulating system for modulating output power of a laser diode, an output power of the laser diode is monitored and a voltage signal corresponding to the detected output power is output. An image signal output system is provided to form an image signal representative of a thickness density of an image to be formed, and a modifying system modifies the image signal such that a changing rate of the image signal between a lower value and a higher value is lowered. A differential amplifier outputs an amplified difference between the modified image signal and the voltage signal, and a driving current to be supplied to the laser diode is generated based on the amplified difference output by the differential amplifier.
摘要翻译：在用于调制激光二极管的输出功率的光功率调制系统中，监视激光二极管的输出功率，并输出与所检测的输出功率对应的电压信号。提供图像信号输出系统以形成表示要形成的图像的厚度密度的图像信号，并且修改系统修改图像信号，使得图像信号在较低值和较高值之间的变化率为降低差分放大器输出经修正的图像信号和电压信号之间的放大的差值，并且基于由差分放大器输出的放大差产生提供给激光二极管的驱动电流。

3. 发明授权

US06844892B2 Multi-beam scanning device 失效
标题翻译：多光束扫描装置
公开(公告)号：US06844892B2
公开(公告)日：2005-01-18
申请号：US10459432
申请日：2003-06-12
申请人： Mitsunori Iima , Toshimitsu Saito , Tadashi Minakuchi , Shoji Iwazaki
发明人： Mitsunori Iima , Toshimitsu Saito , Tadashi Minakuchi , Shoji Iwazaki
IPC分类号： B41J2/47 , G02B26/08 , G02B26/10
CPC分类号： B41J2/473
摘要： A multi-beam scanning device includes a light source for emitting a plurality of laser beams, a polygon mirror for deflecting the laser beams so that the laser beams scan across an object surface in a main scanning direction, an fθ lens disposed between the polygon mirror and the object surface, and a cylindrical lens that converges each laser beam in a vicinity of the polygon mirror in the auxiliary direction. A mirror is disposed between the light source and the cylindrical lens which deflects the laser beams in the auxiliary scanning direction. The mirror is rotatably supported by a mirror holder such that the traveling direction of the laser beams deflected by the mirror can be adjusted.
摘要翻译：多光束扫描装置包括用于发射多个激光束的光源，用于使激光束偏转的多面镜，使得激光束沿主扫描方向扫描物体表面，设置在多面体镜之间的焦距透镜和物体表面，以及在辅助方向上将多个反射镜附近的每个激光束会聚的柱面透镜。在光源和沿辅助扫描方向偏转激光束的柱面透镜之间设置一个反射镜。反射镜由反射镜保持器可旋转地支撑，使得可以调节由反射镜偏转的激光束的行进方向。

4. 发明授权

US06504857B1 Laser diode deterioration detecting device 失效
标题翻译：激光二极管劣化检测装置
公开(公告)号：US06504857B1
公开(公告)日：2003-01-07
申请号：US09612503
申请日：2000-07-07
申请人： Shoji Iwazaki
发明人： Shoji Iwazaki
IPC分类号： H01S300
CPC分类号： H01S5/0021 , H01S5/042 , H01S5/06825
摘要： A laser beam emitting device includes a laser diode, a drive current supply circuit, a laser power detection circuit, a first differential amplifier that outputs a first differential signal corresponding to a difference between the laser power detection signal and a reference value. A laser diode deterioration detection circuit includes a biasing circuit that modifies the laser power detection signal or the reference value upon issuance of deterioration detection command. A sample-hold circuit samples and holds the first differential signal just before the deterioration detection command is issued. A second differential amplifier outputs a second differential signal corresponding to a difference between the first differential signal after the deterioration detection command is issued and the signal held by said sample-hold circuit. A deterioration determining circuit compares the second differential signal and a deterioration detection reference value, and determines whether the laser diode is deteriorated based on the comparison result.
摘要翻译：激光束发射装置包括激光二极管，驱动电流供应电路，激光功率检测电路，输出与激光功率检测信号和参考值之间的差对应的第一差分信号的第一差分放大器。激光二极管劣化检测电路包括在发出劣化检测指令时修改激光功率检测信号或参考值的偏置电路。采样保持电路在发出劣化检测命令之前采样并保持第一差分信号。第二差分放大器输出与发出劣化检测命令之后的第一差分信号与由所述采样保持电路保持的信号之间的差相对应的第二差分信号。劣化判定电路比较第二差分信号和劣化检测基准值，并根据比较结果判断激光二极管是否劣化。

5. 发明授权

US06657844B2 Electromagnetic drive control device 失效
公开(公告)号：US06657844B2
公开(公告)日：2003-12-02
申请号：US10011413
申请日：2001-12-11
申请人： Shoji Iwazaki
发明人： Shoji Iwazaki
IPC分类号： H01H4700
CPC分类号： H01F7/18
摘要： A drive control circuit for an electromagnetic driving device includes a magnet and a drive coil, which moves due to an electromagnetic force when an electrical current flows therethrough. The drive control circuit may include (1) a drive circuit that feeds an electrical current to the drive coil, the drive circuit including at least one voltage source, and (2) a short-circuit system that short-circuits the drive coil. The short-circuit system releases the short-circuited condition of the drive coil in accordance with an output voltage of the at least one voltage source.

6. 发明授权

US06563848B1 Semiconductor laser drive device 失效
标题翻译：半导体激光驱动装置
公开(公告)号：US06563848B1
公开(公告)日：2003-05-13
申请号：US09632623
申请日：2000-08-04
申请人： Shoji Iwazaki
发明人： Shoji Iwazaki
IPC分类号： H01S300
CPC分类号： H01S5/042 , H01S5/0683
摘要： A semiconductor laser device comprises a semiconductor laser, a photo-diode, a first input terminal and a second input terminal. A sample hold circuit, having a first switch and a capacitor, is provided between the first input terminal and the semiconductor laser. A second switch is provided between the second input terminal and the semiconductor laser. A drive current is supplied to the semiconductor laser based on a light radiation level command signal input to the first input terminal. A constant current is generated based on a signal input through the second input terminal. In a sampling mode, the first and second switches are turned ON, and thus, a control current, which is obtained by subtracting the constant current from the drive current, is sampled by the sample hold circuit. In a holding mode, one of a bias current, obtained based on the control current and the constant current, or the drive current are supplied to the semiconductor laser, in accordance with ON/OFF of the second switch.
摘要翻译：半导体激光器件包括半导体激光器，光电二极管，第一输入端子和第二输入端子。具有第一开关和电容器的采样保持电路设置在第一输入端子和半导体激光器之间。在第二输入端子和半导体激光器之间提供第二开关。基于输入到第一输入端子的光辐射电平指令信号，向半导体激光器提供驱动电流。基于通过第二输入端子输入的信号产生恒定电流。在采样模式中，第一和第二开关导通，因此通过从驱动电流中减去恒定电流而获得的控制电流被采样保持电路采样。在保持模式中，根据第二开关的导通/截止，将基于控制电流和恒定电流获得的偏置电流或驱动电流中的一个提供给半导体激光器。

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