The last conferences:

Lightmetry'02
14-16 May 2002, Warsaw, Poland
Organizers: SPIE-PL Chapter and INOS. see for details

Light and Optics in Biomedicine LOB'02
23-24 October 2002, Warsaw, Poland
Organizers: SPIE-PL Chapter and INOS. see for details

Systems of Optical Security - SOS' 03
11-12 December 2003, Warsaw, Poland

Organizers: INOS and SPIE-PL Chapter. see for details