Patent ID: 6512631
Filing Date: 2003-01-28
Classification: G02B,G03F

Abstract:
A combined catadioptric lensing and mirror optical inspection system for inspecting a specimen, comprising:a primary focusing lens arrangement; a primary field lens arrangement; a fold mirror; a Mangin mirror arrangement; a secondary field lens arrangement; and a secondary focusing lens arrangement; wherein said system is able to receive transmitted light energy and pass light energy to said primary focusing lens arrangement, said primary field lens arrangement, said fold mirror, said Mangin mirror arrangement, said secondary field lens arrangement, and secondary focusing lens arrangement, and to said specimen; and further wherein said combined catadioptric lensing and mirror optical inspection system has off-axis orientation whereby output rays provided by said Mangin mirror arrangement are physically displaced from output rays transmitted toward said Mangin mirror arrangement. and still further wherein light energy striking said specimen passes back to said secondary focusing lens arrangement, said secondary field lens arrangement, said Mangin mirror arrangement, said fold mirror, said primary field lens arrangement, and said primary focusing lens arrangement.