All optical extended depth-of field imaging system

摘要

The instant invention is an optical imaging system that produces images of acceptable quality of objects which are located at a wide variety of distances from the optical imaging system. A preferred embodiment of the optical imaging system includes an object ( 10 ), an auxiliary lens ( 12 ), a composite phase marsk ( 14 ) and a detector ( 18 ) arranged along an optical axis ( 20 ). Light from the object ( 10 ) is focused by the auxiliary lens ( 12 ) in tandem with the composite phase mark ( 14 ), producing an image ( 16 ) which is incident th detector ( 18 ).