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US5581069A Louvered light collection arrangement in electro-optical reading systems 失效
电光阅读系统中的路灯采集布置

Louvered light collection arrangement in electro-optical reading systems
摘要:
A louver is mounted adjacent a sensor in a housing of a laser scanning head of a system for electro-optically reading bar code symbols. The louver includes a plurality of mutually parallel, permanently-open slots. The slats are inclined to allow more light from far-out symbols to reach the sensor as compared to close-in symbols.
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