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OPC Code Scanner Algorithm

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Basic Info

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Product description

Barcode Scanning

Optical Product Code (OPC) is a variant of Interleaved 2 of 5. It has also been known as Vision Council of America (VCA) barcode. This symbology is used to mark optical retail products, such as eyeglasses, to identify the product and its manufacturer.

OPC is defined in The Optical Product Code (OPC) Guide for Lenses document that is maintained by The Vision Council.

Symbol Structure

The symbol comprises the following elements:

Leading quiet zone
Five digits that identify the manufacturer, as assigned by The Vision Council
Four digits that identify the product, as assigned by the manufacturer
One mandatory check digit
Trailing quiet zone

Character Set

This symbology supports all numeric digits (0-9).

Check Digit

OPC uses a check digit that is based on the modulo 10 (mod 10) algorithm.

Symbol Dimensions

The recommended minimum symbol height is 0.25 inch or 15 percent of the symbol width (excluding quiet zones), whichever is greater. The X dimension range is from .0075 inch minimum to .015 inch maximum. The quiet zones must be at least 11X wide, where "X" is the current X dimension.

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