Optical Device : (ICT) 'Optical' means light. So an 'optical device' makes use of light in order to work. For example, a DVD reader is an optical device because a laser beam is used to read the data from the disk
Teach-ICT.com (Information and Communications Technology), Browse by alphabet, USA 2015. http://www.teach-ict.com/glossary/E/ergonomics.htm , (Info and Commun Tech - Amer) {736}