Patent ID: 6700108
Filing Date: 2004-03-02
Classification: G01J

Abstract:
An optical system for receiving reflected radiation from an object; the optical system comprising:a collection optics system for collecting radiation reflected from an object and directing all of said reflected radiation to a first image plane; a digital mirror device disposed at said first image plane, said digital mirror device having a plurality of individually controllable pixel elements whose reflectivity is a function of a drive signal applied thereto; an imaging lens disposed adjacent to the first image plane for imaging all said radiation at a second image plane; an imaging device disposed at a second image plane, said imaging device including pixel elements; an automatic limit control system coupled to said individual pixel elements in said imaging device and said digital mirror device forming a closed feedback loop of said individual pixel elements; a mirror drive amplifier for adjusting the reflectivity of said individual pixel elements as a function of the value of said mirror drive signals.