A compact retro-reflective module for use in electro-optical bar code readers includes components arranged to fold outgoing and incoming light along crossed optical paths. The module is convertible between generating one-dimensional and two-dimensional scan patterns to read bar code symbols....http://www.google.fr/patents/US6715685?utm_source=gb-gplus-shareBrevet US6715685 - Optical path design for scanning assembly in compact bar code readers
Optical path design for scanning assembly in compact bar code readers
