Lens triplets (two achromats and a apochromat) are disclosed that are well-corrected for chromatic aberration and for spherochromatism. Each triplet comprises two identical acrylic lens elements and a liquid lens element....http://www.google.es/patents/US4950041?utm_source=gb-gplus-sharePatente US4950041 - Lens systems comprising plastic and liquid lens elements
Lens systems comprising plastic and liquid lens elements
