发明名称 |
Optical position detection device and distance measurement device |
摘要 |
A signal current I1 that is output from output terminal of semiconductor position detection element is converted to a signal voltage V1 by a current/voltage conversion unit and a signal current I2 that is output from output terminal is converted to a signal voltage V2 by a current/voltage conversion unit. Signal voltages V1 and V2 are compared in magnitude by a comparison circuit and a comparison signal is output so that maximum signal Vmax and minimum signal Vmin are selected. In A/D conversion circuit, the A/D conversion range is set using maximum signal Vmax, and minimum signal Vmin is converted to a digital signal and output. The position of beam incidence on semiconductor position detection element is found by incidence position calculating unit using the comparison signal and digital signal.
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申请公布号 |
US2002074530(A1) |
申请公布日期 |
2002.06.20 |
申请号 |
US20010005844 |
申请日期 |
2001.12.07 |
申请人 |
MIZUNO SEIICHIRO;KURAHASHI AKIRA;ADACHI IZUMI;KURAHASHI TAKAKO |
发明人 |
MIZUNO SEIICHIRO;KURAHASHI AKIRA;ADACHI IZUMI;KURAHASHI TAKAKO |
分类号 |
H01L31/16;G01C3/06;G01S3/781;G01S7/48;G01S17/08;G01S17/46;(IPC1-7):G01V8/00;G01N21/86 |
主分类号 |
H01L31/16 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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