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3.
Instrument Components and Specifications
Requirements for bar code printing
Bar code scanners
20
The quality and readability of printed bar codes will depend on several fac-
tors that include:
• Texture and quality of the printable surface of the cassettes.
• Color of the selected cassette or slide
• Barcode style (2D).
• The number and types of characters required in the barcode.
• The quality and resolution capabilities of the bar code reader
As always, using Leica recommended print media will produce the highest
quality print. However, it is highly recommended that any bar code solution
be tested prior to implementation. Please check with your local represen-
tative for details on achieving the maximum number of characters with
2 D bar codes.
The scanning results obtained not only depend on the correct bar code
creation and on the quality of the cassettes but also on the features of the
bar code scanner used.
Features to bear in mind are:
• Reading tolerance:
difference between actual bar width and nominal module size.
• Light color:
the light color of the bar code scanner should be opposite (highly
contrasting) to the color of the cassettes being used.
• Optical resolution:
must be better than the module size.
Depending on the application, the following features should also be
considered:
• Maximum readable distance
• Maximum inclination angle
Leica has successfully tested the following readers:
Symbol DS 6707 Bar code Scanner
Instructions for Use V 1.9 RevH – 03/2017
Fig. 10
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