Motorola MS4404 用户手册
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Symbol MS4404/MS4407 Integration Guide
Location and Positioning
The location and positioning guidelines provided do not consider unique application characteristics. It is
recommended that an opto-mechanical engineer perform an opto-mechanical analysis prior to integration.
recommended that an opto-mechanical engineer perform an opto-mechanical analysis prior to integration.
Embedded Applications Requiring a Window
Use the following guidelines for applications that require a window in front of the MiniScan.
Window Material
Many window materials that look perfectly clear can contain stresses and distortions that can reduce imager
performance. For this reason, optical glass or cell-cast acrylic with an anti-reflection coating is highly
recommended. Following is a description of acrylic, and CR-39, another popular window material.
performance. For this reason, optical glass or cell-cast acrylic with an anti-reflection coating is highly
recommended. Following is a description of acrylic, and CR-39, another popular window material.
outlines the suggested window properties.
Acrylic
When fabricated by cell-casting, acrylic has very good optical quality and low initial cost. However, protect the
surface from the environment as acrylic is susceptible to attack by chemicals, mechanical stresses, and UV light.
Acrylic has reasonably good impact resistance and can be ultrasonically welded.
surface from the environment as acrylic is susceptible to attack by chemicals, mechanical stresses, and UV light.
Acrylic has reasonably good impact resistance and can be ultrasonically welded.
CR-39
CR-39 is a thermal-setting plastic produced by the cell-casting process, and is commonly used in plastic eye glasses
lenses. CR-39 has excellent chemical and environmental resistance, including good surface hardness. Typically it
does not require hard-coating, but can be hard coated for severe environments. CR-39 has reasonably good impact
resistance and cannot be ultrasonically welded.
lenses. CR-39 has excellent chemical and environmental resistance, including good surface hardness. Typically it
does not require hard-coating, but can be hard coated for severe environments. CR-39 has reasonably good impact
resistance and cannot be ultrasonically welded.
NOTE
Integrate the imager in an environment no more extreme than the product’s specification, where the
imager will not exceed its temperature range. For instance, do not mount the imager onto or next to a large
heat source. When placing the imager with another device, ensure there is proper convection or venting
for heat. Follow these suggestions to ensure product longevity, warranty, and overall satisfaction with the
imager.
imager will not exceed its temperature range. For instance, do not mount the imager onto or next to a large
heat source. When placing the imager with another device, ensure there is proper convection or venting
for heat. Follow these suggestions to ensure product longevity, warranty, and overall satisfaction with the
imager.
NOTE
Motorola does not recommend placing an exit window in front of the MiniScan; however, the following
information is provided for applications that require such a window.
information is provided for applications that require such a window.
NOTE
The window placement and material recommendations that follow should be considered if the Symbol
MS440X is mounted within a product with its own window.
MS440X is mounted within a product with its own window.
CAUTION
Consult an opto-mechanical engineer to recommend an appropriate window material and to
determine if coatings are appropriate for the specific application.
determine if coatings are appropriate for the specific application.
NOTE
Do not use polycarbonate material.