6
Window Material and Color
Wavelengths of illumination and aiming beams should be taken into consideration when choosing window
material and color, to achieve the possible highest spectral transmission, lowest haze level and
homogeneous refractive index. It is suggested to use PMMA or optical glass with spectral transmittance
over 90% and haze less than 1%. Whether to use an anti-reflection coating or not depends on the
material and application needs.
Scratch Resistance and Coating
Scratch on the window can greatly reduce the performance of the EM2039. It is suggested to use
abrasion resistant window material or coating.
Window Size
The window must not block the field of view and should be sized to accommodate the aiming and
illumination envelopes shown below.
Summary of Contents for EM2039 Series
Page 1: ...EM2039 Series OEM Scan Engine Integration Guide ...
Page 3: ...Revision History Version Description Date V1 0 0 Initial release May 21 2013 ...
Page 6: ......
Page 13: ...7 Illumination Aiming Fig 2 3 Fig 2 4 ...
Page 16: ...10 Bottom View Fig 2 8 Top View Fig 2 9 ...
Page 17: ...11 Imager Discrete Type unit mm Front View Fig 2 10 Bottom View Fig 2 11 Top View Fig 2 12 ...
Page 18: ...12 Right View Fig 2 13 Decoder Board Discrete Type unit mm Front View Fig 2 14 ...