发明名称 |
Optical information reading apparatus having means for judging laser deterioration |
摘要 |
An optical information reading apparatus comprises: a semiconductor laser (30); an optical scanning mechanism (50) for scanning bar code (90) using a laser beam emitted from the semiconductor laser (30); a photodetector (70) receiving a returning laser beam reflected at the bar code (90); information reading device (130, 140) for reading out information from the bar code on the basis of the returning laser beam received by the photodetector (70); sweep angle regulating mechanism (150, 180) for restricting a sweep angle of the laser beam used in a scanning operation of the optical scanning device (50) within a predetermined angle so as to scan only one bar code; an operational current detecting circuit (120) for detecting an operational current value of the semiconductor laser (30); and a deterioration judging device for making a judgement as to whether the semiconductor laser (30) is deteriorated or not on the basis of the operational current detected by the operational current value detecting circuit (120).
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申请公布号 |
US5552590(A) |
申请公布日期 |
1996.09.03 |
申请号 |
US19930117441 |
申请日期 |
1993.09.07 |
申请人 |
NIPPONDENSO CO., LTD. |
发明人 |
OBATA, KENZO;GOTO, KATSUNORI |
分类号 |
G06K7/10;(IPC1-7):G06K7/10 |
主分类号 |
G06K7/10 |
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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