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1. 发明授权

US5155721A Optical data storage accessing apparatus 失效
标题翻译： CAL数据存储访问设备
公开(公告)号：US5155721A
公开(公告)日：1992-10-13
申请号：US830463
申请日：1992-02-06
申请人： Shigeru Yoda , Kazuo Tsuboi
发明人： Shigeru Yoda , Kazuo Tsuboi
IPC分类号： G11B7/135 , G11B7/12
CPC分类号： G11B7/12
摘要： An optical data storage accessing apparatus which includes a first light projecting unit including a laser diode for projecting data recording light onto a data storage medium, a second light projecting unit for projecting data recording light onto the data storage medium, and a light receiving unit. The light receiving unit receives the data reading light after it is reflected by the data storage medium to read data recorded on the data storage medium. An optical unit joins the data recording light and the data reading light and separates data reading light reflected from the data storage medium from the data recording light.
摘要翻译：一种光学数据存储访问装置，包括：第一光投射单元，包括用于将数据记录光投射到数据存储介质上的激光二极管;第二光投射单元，用于将数据记录光投影到数据存储介质上;以及光接收单元。光接收单元在由数据存储介质反射之后接收数据读取光，以读取记录在数据存储介质上的数据。光学单元连接数据记录光和数据读取光，并从数据记录光分离从数据存储介质反射的数据读取光。

2. 发明授权

US5027339A Optical card analyzing apparatus 失效
标题翻译：光卡分析仪
公开(公告)号：US5027339A
公开(公告)日：1991-06-25
申请号：US227336
申请日：1988-08-02
申请人： Shigeru Yoda , Kouji Nitto
发明人： Shigeru Yoda , Kouji Nitto
IPC分类号： G11B7/0033 , G11B19/04 , G11B20/18 , G11B27/36
CPC分类号： G11B27/36 , G11B19/04 , G11B20/1803 , G11B7/0033
摘要： There is provided an optical card information recording/playing back apparatus comprising: an optical system for irradiating a light beam for reproducing recorded information onto information recording tracks of the optical card on which pit trains indicative of recording information are formed; a photo detector for receiving the reflected light from the optical card and outputting a photo sensing signal; a pit correspondence signal producing circuit for detecting a peak of the photo sensing signal and producing a pit correspondence signal which changes in correspondence to a pit position on the basis of the result of the peak detection; a frequency/voltage converter for converting a frequency of the pit correspondence signal to a voltage; and a discrimination signal producing circuit for comparing a voltage output of the frequency/voltage converter with a reference value and producing an information presence/absence discrimination signal.
摘要翻译：提供了一种光卡信息记录/重放装置，包括：光学系统，用于将记录信息再现的光束照射到其上形成指示记录信息的凹坑列的光卡的信息记录轨道上; 光检测器，用于接收来自光卡的反射光并输出感光信号; 凹坑对应信号产生电路，用于检测光感测信号的峰值，并产生与峰值检测结果相对应的凹坑位置改变的凹坑对应信号; 用于将所述凹坑对应信号的频率转换为电压的频率/电压转换器; 以及鉴别信号产生电路，用于将频率/电压转换器的电压输出与参考值进行比较，并产生信息存在/不存在鉴别信号。

3. 发明授权

US5276667A Optical recording and reproducing apparatus for synchronizing recording on subsequent unrecorded sectors 失效
标题翻译：用于在后续未记录扇区上同步记录的光学记录和再现装置
公开(公告)号：US5276667A
公开(公告)日：1994-01-04
申请号：US944740
申请日：1992-09-14
申请人： Keiichi Tsutsui , Shigeru Yoda , Kouji Sogou
发明人： Keiichi Tsutsui , Shigeru Yoda , Kouji Sogou
IPC分类号： G11B7/004 , G11B7/007 , G11B7/013 , G11B20/10 , G11B27/30 , H04N5/76 , G11B5/09
CPC分类号： G11B7/24085 , G11B20/10 , G11B27/3027 , G11B7/004 , G11B7/00745
摘要： Disclosed is an optical recording and reproducing apparatus capable of recording in a position which is properly synchronous with the position of the last pit in a sector on which a recording was made, the first pit in a sector on which a recording is to be subsequently made. This apparatus is characterized by a recording circuit having a data demodulating circuit which includes a synchronizing signal separating circuit. The synchronizing signal separating circuit outputs a synchronizing signal on the basis of a pit detection signal generated in response to the detection of pits formed on a track of a recording medium and representing data to be recorded. An end pattern detecting circuit is employed for outputting an end pattern detection signal when an end pattern of a sector is detected in a data signal outputted from the data demodulating circuit an initial pulse leading edge timing generating circuit is also included which consist of a counter responsive to the signal of the data demodulating circuit for starting the counting of high-frequency clock pulses, an initial pulse time setting circuit in which the time for defining the leading edge of an initial pulse is set, and a comparing circuit (73) for outputting the initial pulse when a count number in the counter coincides with the time set in the initial pulse time setting circuit.
摘要翻译：公开了一种光学记录和再现装置，能够在与记录的扇区中的最后一个凹坑的位置适当同步的位置记录在其后记录的扇区中的第一个凹坑。该装置的特征在于具有包括同步信号分离电路的数据解调电路的记录电路。同步信号分离电路基于响应于形成在记录介质的轨道上的凹坑的检测而产生的表示要记录的数据而生成的凹坑检测信号，输出同步信号。当在从数据解调电路输出的数据信号中检测到扇区的结束模式时，结束模式检测电路用于输出结束模式检测信号，还包括初始脉冲前沿定时产生电路，其包括响应于计数器将用于开始高频时钟脉冲的计数的数据解调电路的信号设置在其中设定用于定义初始脉冲的前沿的时间的初始脉冲时间设定电路和用于输出初始脉冲的比较电路（73）当计数器中的计数值与初始脉冲时间设置电路中设置的时间一致时的初始脉冲。

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