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    • 121. 发明授权
    • Wavelength and output power stabilizing apparatus for semiconductor laser
    • 用于半导体激光器的波长和输出功率稳定装置
    • US5042042A
    • 1991-08-20
    • US342788
    • 1989-04-25
    • Nobuo HoriFumio OhtomoTakumi Uchiyama
    • Nobuo HoriFumio OhtomoTakumi Uchiyama
    • H01S5/068H01S5/0683H01S5/0687
    • H01S5/0683H01S5/0687H01S5/06837
    • An output power and wavelength stabilizing apparatus of a semiconductor laser has an injection current supplying source adapted to supply injection current to a single-mode semiconductor laser, a first light receiving portion adapted to receive a part of the output power of the semiconductor laser through a first optical element with varying spectral characteristics in the wavelength area of the semiconductor laser and to output a first signal, a second light receiving portion adapted to receive a part of the output power of the semiconductor laser through a second optical element with varying spectral characteristics opposite to that of the first optical element and to output a second signal, a wavelength fluctuation detecting portion for producing a difference signal related to the first signal and the second signal and obtaining a fluctuation of the wavelength of the semiconductor laser based on the difference signal, an output fluctuation detecting portion for producing a signal related to the sum of the first and the second signals and obtaining the fluctuation of output power of the semiconductor laser based on the sum signal, and a temperature control portion for controlling the temperature of the semiconductor laser to a predetermined operating temperature based on the fluctuation of the output power of the semiconductor laser obtained by the output power fluctuation detecting portion so that the output power of the semiconductor laser can be maintained constant. The injection current supplying source is used to control the wavelength of the semiconductor laser based on the fluctuation of the wavelength of the semiconductor laser obtained by the wavelength fluctuation detecting portion such that the wavelength remains constant.
    • 半导体激光器的输出功率和波长稳定装置具有适于向单模半导体激光器提供注入电流的注入电流供给源,适于通过一个半导体激光器接收半导体激光器的一部分输出功率的第一光接收部分 第一光学元件,其在半导体激光器的波长区域中具有变化的光谱特性并输出第一信号;第二光接收部分,适于通过具有相反的光谱特性的第二光学元件接收半导体激光器的输出功率的一部分 并输出第二信号,波长波动检测部分,用于产生与第一信号和第二信号相关的差信号,并且基于差分信号获得半导体激光器的波长波动, 用于产生信号re的输出波动检测部分 相对于第一信号和第二信号的和,并且基于和信号获得半导体激光器的输出功率的波动;以及温度控制部分,用于基于波动控制半导体激光器的温度到预定的工作温度 由输出功率波动检测部分获得的半导体激光器的输出功率使半导体激光器的输出功率保持恒定。 注入电流供给源用于基于由波长起伏检测部分获得的半导体激光器的波长的波动使得波长保持恒定来控制半导体激光器的波长。
    • 122. 发明授权
    • Non-contact type tonometer
    • 非接触式眼压计
    • US4947849A
    • 1990-08-14
    • US75543
    • 1987-07-20
    • Susumu TakahashiFumio Ohtomo
    • Susumu TakahashiFumio Ohtomo
    • A61B3/16
    • A61B3/165
    • A non-contact type tonometer is disclosed. It has an arrangement for transfiguring a cornea to be tested by discharging a fluid to it. This first arrangement comprises a rotary solenoid, a cylinder, and a rotary solenoid driving circuit. It also has a second arrangement for detecting the physical quantity showing the transfiguration of the cornea. The second arrangement comprises a radiating optical system and a detecting optical system. It also has a circuit serving as a third arrangement for detecting the flow pressure of the fluid which has a correlation with an intraocular pressure. It has a fourth arrangement for establishing a correlation function curve between the physical quantity and the flow pressure of the fluid based on the information from the second and third arrangements, deducing a flow pressure value corresponding to the preset value of the physical quantity from the correlation function curve, and converting such deduced flow pressure value of the fluid to an intraocular pressure value.
    • 公开了非接触型眼压计。 它具有通过向其中排出流体来变形待测试的角膜的装置。 该第一装置包括旋转螺线管,气缸和旋转螺线管驱动电路。 它还具有用于检测显示角膜变形的物理量的第二布置。 第二装置包括辐射光学系统和检测光学系统。 它还具有用作检测与眼内压相关的流体的流量压力的第三装置的电路。 它具有第四装置,用于根据来自第二和第三装置的信息建立流体的物理量和流量压力之间的相关函数曲线,从相关性推导出与物理量的预设值对应的流量压力值 功能曲线,并将流体的推导流量压力值转换为眼压值。
    • 125. 发明授权
    • Displacement measuring device utilizing an incremental code
    • 使用增量代码的位移测量装置
    • US4580046A
    • 1986-04-01
    • US696049
    • 1985-01-29
    • Tsuneo SasakiFumio OhtomoTakashi YokokuraFumitomo Kondo
    • Tsuneo SasakiFumio OhtomoTakashi YokokuraFumitomo Kondo
    • G01D5/36G01D3/028G01D5/244G01D5/245G01P3/481G01P3/489H03M1/00G01D5/38
    • G01D5/24404G01P3/489H03M1/305
    • A displacement measuring device, using an incremental code, which includes a coding member (22) resting on the object (21) to be measured and having a coding section for generating such signals that a sensing element can discriminate the signals as 0 or 1, sensing means (25A, 25B) disposed to sense the coding section of the coding member for producing sensed signals in response to the displacement of the coding member (22), and rectangular wave-converting circuits (27A, 27B) for receiving and converting the sensed signal into rectangular wave signals. A clock pulse generator (28) is provided in the device for generating a clock pulse with a higher repetition-frequency than the repetition-frequency of the sensed signal. An edge detector (29) receives the clock pulse from the clock pulse generator (28) and the rectangular wave-signal from the rectangular wave-converting circuits (27A, 27B) and then delivers, as an output pulse, the clock pulse substantially coincident with at least one of the leading edge and the trailing edge of the rectangular wave-signal. A counter (30) counts the output pulses from the edge detector and a display (31) indicates the counted value. With such an arrangement, an incremental displacement measurement can be made without a differentiating circuit and an averaging circuit.
    • PCT No.PCT / JP82 / 00119 Sec。 371日期1982年12月10日 102(e)1982年12月10日日期PCT提交1982年4月12日PCT公布。 公开号WO82 / 03682 日期:1982年10月28日。一种位移测量装置,使用增量代码,其包括搁置在要测量的物体(21)上的编码构件(22),并具有用于产生感测元件可以区分的信号的编码部分 信号为0或1,感测装置(25A,25B),用于感测编码部件的编码部分,以响应于编码部件(22)的位移产生感测信号;以及矩形波转换电路(27A, 27B),用于接收并将感测信号转换成矩形波信号。 时钟脉冲发生器(28)设置在该装置中,用于产生具有比所感测信号的重复频率更高的重复频率的时钟脉冲。 边缘检测器(29)从时钟脉冲发生器(28)接收时钟脉冲和来自矩形波转换电路(27A,27B)的矩形波信号,然后作为输出脉冲输出基本上一致的时钟脉冲 其中矩形波信号的前沿和后沿中的至少一个。 计数器(30)对来自边缘检测器的输出脉冲进行计数,显示器(31)表示计数值。 通过这样的布置,可以在没有微分电路和平均电路的情况下进行增量位移测量。
    • 126. 发明授权
    • Apparatus for measuring length or angle
    • 用于测量长度或角度的装置
    • US4484816A
    • 1984-11-27
    • US515454
    • 1983-07-20
    • Fumio OhtomoKazuaki Kimura
    • Fumio OhtomoKazuaki Kimura
    • G01D5/36G01B11/02G01B11/26G01D5/249G01D5/347G08C19/00G01B1/00G01B11/14
    • G01D5/2492
    • A light image of a scale, which bears length or angle information recorded in the form of a bright and dark bit pattern, is projected onto the light receiving surface of a storage effect type sensor, whereby a charge pattern data corresponding to the projected image is formed. Before the regular read-out of the charge pattern data thus formed from the sensor, the sensor is scanned at least once at a higher scanning frequency than the frequency for the regular data read-out. From the data thus read out, read-out data that obtained in the absence of illumination light is subtracted, and the resultant data which is free from error component is processed to obtain a final measurement of the length or angle.
    • 承载以明暗位图形式记录的长度或角度信息的刻度的光图像被投影到存储效果型传感器的光接收表面上,由此对应于投影图像的电荷图案数据是 形成。 在从传感器正常读出这样形成的电荷模式数据之前,传感器以比常规数据读出的频率更高的扫描频率扫描至少一次。 从这样读出的数据中,减去在没有照明光的情况下获得的读出数据,并且处理没有误差分量的结果数据,以获得长度或角度的最终测量值。