An assembly for collecting light from indicia includes a chassis having a port through which the light from the indicia passes, and walls bounding an interior compartment. A self-retaining frame constituted of an optical material is non-adhesively mounted within the compartment in an assembled position....http://www.google.com/patents/US7854382?utm_source=gb-gplus-sharePatent US7854382 - Light collection assembly with self-retaining lens in electro-optical reader
