2
Illumination
The EM2039 has two red LEDs (wavelength: 625±10 nm) for supplementary lighting, making it possible
to scan barcodes even in complete darkness. The illumination can be programmed On or Off.
Since red light is used as illumination and the engine
’s lens imaging system is coated with AR film which
has obvious anti-reflection effect against red light, the engine shows better reading performance on
barcodes printed in non-red colors. For applications involving red barcodes, it is advised to use non-red
supplementary lighting. The user can conduct some tests to determine the proper wavelengths to be
used.
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 ...
