A cover for a biological sample well tray, comprising a cap for sealing a sample well. The cap comprises a well lens for focusing light into the sample well and collecting light from the sample. In another aspect, the cap comprises an elongate portion configured to permit incoming light to pass into...http://www.google.com/patents/US20080194014?utm_source=gb-gplus-sharePatent US20080194014 - Caps for Sample Wells and Microcards for Biological Materials
