10
C005383_10 CR80XX Integration Guide
3.1 – Window Requirements
3 - Optical Considerations
When integrating the CR8000 into your device or application, it may be
necessary to install a window in front of the optics of the Scan Engine.
Although many different types of materials can be considered, Code makes
the following recommendations.
Placement:
Contact to 0.5 mm away from the face of the Scan Engine,
parallel to engine face
Material:
Optically clear acrylic
Thickness:
1 mm or less
If your design constraints prevent the window from being mounted within
0.5 mm of the face of the engine, Code recommends an anti-reflective
(AR) coating be applied to both window surfaces (front and back). The AR
coating must have less than 3% reflectance from 400nm to 1000nm.
The window must be wide and tall enough so the surrounding enclosure
does not block any of the illumination from the LEDs. The following diagram
illustrates the field of illumination that must be unobstructed
by the edges of the window aperture.
CR8000 Field of Illumination Diagram
Distance to
Window (D)
Illumination
Width (W)*
Illumination
Height (H)*
1 mm
19.58 mm
11.40 mm
2 mm
20.51 mm
12.33 mm
3 mm
21.44 mm
13.26 mm
4 mm
22.37 mm
14.20 mm
5 mm
23.31 mm
15.13 mm
*Window must exceed this width/height
25.00˚
25.00˚
8.69 (CENTER-TO-CENTER LED SPACING)
D
H
D
16.87 (CENTER-TO-CENTER LED SPACING)
WINDOW SIZE MUST
EXCEED WIDTH
AND HEIGHT OF
ILLUMINATION ANGLE
W
25.00˚
25.00˚