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US 5,347,114 AGranted
Bar code symbol reading apparatus
AssigneeOlympus Optical Co., Ltd.
InventorHisakatsu Tanaka
Life of this patent
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Abstract
The imaging result obtained by an imaging device for imaging light reflected by a bar code symbol and incident on it via a first mirror is decoded by a decoder and stored in a first symbol label memory. The bar code symbol label is again imaged by the imaging device via a second mirror, and the imaging result is decoded and stored in a second symbol label memory. A comparator compares the contents of the two symbol label memories and synthesizes them in accordance with the comparison result. The result of synthesis is stored in the first symbol label memory.
Claims19
A bar code symbol reading apparatus, comprising:
- condition-changing means for changing an imaging condition under which a bar code symbol will be imaged;
- imaging means for imaging same components of the bar code symbol at least twice by changing the imaging condition at least twice by said condition-changing means, thereby imaging the same components of the bar code symbol under at least two different imaging conditions, and producing at least two respective imaging results;
- decoding means for decoding said at least two imaging results of said imaging means to obtain at least two respective decoding results;
- at least two storing means for storing said at least two decoding results of said decoding means;
- and
- synthesizing means for synthesizing said at least two image results stored in said at least two storing means to produce a signal corresponding to the imaged bar code symbol.
3 more elements
Dependencies are inferred from the claim text.