Bar code reader coping with highly reflective surfaces - uses blocking circuit to process signals obtained from polarised beam scanning unit

Polarised light (8) is directed onto a stationary mirror (16) that provides a 90 deg. deflection onto an oscillating mirror (18) that causes the surface of the object contg. the bar code to be scanned (2). The reflected signal is directed (14) onto a blocking unit (3) that suppresses surface reflect...

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1. Verfasser:	CHRISHOLM, THOMAS J., MILTON, MASS., US
Format:	Patent
Sprache:	eng ; ger
Schlagworte:	CALCULATING COMPUTING COUNTING HANDLING RECORD CARRIERS PHYSICS PRESENTATION OF DATA RECOGNITION OF DATA RECORD CARRIERS
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creator	CHRISHOLM, THOMAS J., MILTON, MASS., US
description	Polarised light (8) is directed onto a stationary mirror (16) that provides a 90 deg. deflection onto an oscillating mirror (18) that causes the surface of the object contg. the bar code to be scanned (2). The reflected signal is directed (14) onto a blocking unit (3) that suppresses surface reflection effects. - The transmitted component is passed to an opto-electrical detector that contains an A-D converter stage. The digital signal is received by a bar code width logic unit (5) coupled to a decoder (6) to provide the data.
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The reflected signal is directed (14) onto a blocking unit (3) that suppresses surface reflection effects. - The transmitted component is passed to an opto-electrical detector that contains an A-D converter stage. The digital signal is received by a bar code width logic unit (5) coupled to a decoder (6) to provide the data.</abstract><oa>free_for_read</oa></addata></record>
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language	eng ; ger
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subjects	CALCULATING COMPUTING COUNTING HANDLING RECORD CARRIERS PHYSICS PRESENTATION OF DATA RECOGNITION OF DATA RECORD CARRIERS
title	Bar code reader coping with highly reflective surfaces - uses blocking circuit to process signals obtained from polarised beam scanning unit
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