A miniature microscope objective for a miniature microscope array (MMA) includes preferably at least three or four lenses including from object to image a first positive lens, a second positive lens and a third negative lens. The objective has a numerical aperture (NA) that provides diffraction limited...http://www.google.de/patents/US7023622?utm_source=gb-gplus-sharePatent US7023622 - Miniature microscope objective lens
