United States Patent 6,373,969 Adler April 16, 2002 Corrective optical component Abstract An optical imaging device such as a fingerprint imager is disclosed that has an optical modification to reduce perspective distortion in a read image. The optical modification is a contoured lens, a contoured platen recess, a contoured output port, or a contoured reflective surface that compensates for perspective distortion. The optical modification is provided by a complex optical surface and is distinct for a uniformly planar, spherical or cylindrical lens. In addition, a method for determining a perspective distortion correction is disclosed. Inventors: Adler; Andrew (Ottawa, CA) Assignee: Activcard Ireland, Limited (Dublin, IE) Appl. No.: 267615 Filed: March 15, 1999