Motorola MSXX07 ユーザーズマニュアル

2 - 12 Symbol MiniScan MSXX07 Series Integration Guide

Use the following guidelines for applications that require a window in front of the MiniScan.

Many window materials that look perfectly clear can contain stresses and distortions that can reduce scanner 
performance. For this reason, Motorola highly recommends only optical glass or cell-cast acrylic with an 
anti-reflection coating. Following is a description of acrylic, and CR-39, another popular window material. 

 outlines the suggested window properties.

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.

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.

Glass is a hard material which provides excellent scratch and abrasion resistance. However, unannealed glass is 
brittle. Increasing flexibility strength with minimal optical distortion requires chemical tempering. Glass cannot be 
ultrasonically welded and is difficult to cut into odd shapes.

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.

Consult an opto-mechanical engineer to recommend an appropriate window material and to 
determine if coatings are appropriate for the specific application.

Do not use polycarbonate material.