©2005 Nordic ID Oy
Nordic ID PL3000 user manual, v. 2.4, March 2006
23
4.1.8 Imager (optional)
Imager consists of three parts - sighter, optics and optical reader.
The sighter is used for aiming the reader at the barcode to be read. There are two types of sighters
available:
•
LED-sighter shows green rectangle and blinking red light. The reading area is inside the green
rectangle.
•
Laser-sighter shows red corners of a rectangle and red dots in the middle of the rectangle. The
reading area is in between of the corners.
There are two alternatives for the imager optics.
•
High density optics (HD) is used for reading small codes from short distance.
•
Standard density optics (SR) is used for reading codes from 5 cm to 50 cm depending the size and
density of the code.
There are three alternative decoders for the imager:
•
1D decoder is used for reading barcodes and PDF matrixes.
•
Limited decoder is used for reading 1D and 2D codes.
•
Full decoder is used for taking photos.
Lightning conditions
The imager is designed to be used under lighting conditions ranging from complete darkness to 100,000
lux. Below 540 lux the reading distance may be reduced. Typical indoor light varies from 1000 to 2000 lux
and bright sunlight is 30,000 lux. The imager may not work under conditions of specular reflection.
Reading distance and viewing area
The reading distance varies on the ambient conditions and barcode types. At 23°C temperature and
ambient light from 540 to 10,’000 the reading distances for various barcodes may vary from 2 cm to 50
cm. Detailed information of reading distances for different barcodes are in Appendix B.
With a nominal operating distance, the reading angle is 40 degrees. The PL3000 can be rotated 180
degrees, e.g. the imager can read codes upside down. The angle may effect on reading.
