The new polariser and diffuser optical filter accessories for Microscan’s MicroHawk barcode readers are suitable in applications where barcodes placed on highly reflective surfaces impede decoding.
They replace the standard front window, blocking out unwanted light and passing only the light needed for inspection while enhancing contrast and resolution.
The diffuser accessory softens and flattens the background light to minimise noise and reflections. It is useful when the reader needs to be mounted in 90 deg, where direct specular reflection is most likely.
Conversely, the polariser accessory eliminates ‘hot spots’ by allowing one linear light polarisation to be used for the outgoing scanning beam, while the other perpendicular light polarisation will return to the scanner, pass through the polariser and be detected.