Patent ID: 6097551
Filing Date: 2000-08-01
Classification: G02B

Abstract:
A lens system for forming an image of an object, said system having a focal length f.sub.0 and consisting in order from its object side to its image side of:(a) a first lens element having a focal length f.sub.1 and a thickness t.sub.1 ; and(b) a second lens element having a focal length f.sub.2, said second lens element being spaced from the first lens element by a distance d.sub.12 ;wherein:f.sub.1 <0;.vertline.f.sub.1 .vertline./f.sub.0 >1.0;t.sub.1 /f.sub.0 >0.5;f.sub.2 >0; andd.sub.12 /f.sub.0 >0.25.