Patent ID: 8638445
Filing Date: 2014-01-28
Classification: G01B

Abstract:
1. An imaging apparatus comprising: a light source for emitting a projection beam; a first beam splitter for reflecting said projection beam; an objective lens unit having an interferometer and objective lens, said objective lens unit being adjustable between a plurality of configurations and disposed above an object to be scanned, including a reflection reference surface capable of splitting said projection beam into a measurement beam and a reference beam, said measurement beam projecting onto an outer surface of the object to be scanned so as to generate a first reflection beam, said reference beam reflected from said reflection reference surface as a second reflection beam, which mixes with said first reflection beam to pass through said first beam splitter, thereby forming an operating beam; a second beam splitter disposed above said first beam splitter for modulating said operating beam into a first sub-beam and a second sub-beam; a monochrome image detection device disposed transversely to an optical path of said first sub-beam for obtaining an interferometric image containing an interference fringe from a first interference region responsive to said objective lens unit being in at least a first configuration, said first interference region being formed due to interference caused between said first reflection beam and said second reflection beam; an image detection device disposed in an optical path of said second sub-beam for obtaining a non-interferometric image free from any interference fringe from the outer surface of a second interference region responsive to said objective lens unit being in at least a second configuration, said second interference region being formed due to interference caused between said first reflection beam and said second reflection beam.