Original Publication Date: 1979-Jun-01
Included in the Prior Art Database: 2005-Feb-20
A triplet lens 1 provides a short, focal length, light collecting system useful in collecting light from wide angle, large area sources and delivering a focused bundle of light energy. Lens 1 has a condenser lens element 2 air spaced from plano-concave negative lens elements 3 and 4, the various lens elements 2-4 being supported in a mounting ring 5. Light is transmitted into lens 1 from a fiber-optic bundle 6, and lens 1 is operative to form an image of the end of the fiber-optic bundle in a focal plane 7.