Patent ID: 6046801
Filing Date: 2000-04-04
Classification: G01N

Abstract:
An optical inspection system for detecting surface imperfections in an optical disk, comprising:a light source;a rotatable reflective member having a substantially planar reflective surface for directing a source beam from said light source towards said disk and for guiding a reflected beam being reflected from said disk;an actuator device coupled to said reflective member for rotating said reflective member about an axis of rotation, the planar reflective surface of said reflective member being precisely aligned with the axis of rotation of said actuator device;at least one optical lens positioned between said reflective member and said disks for directing focusing said source beam at the surface of said disk and for guiding said reflected beam back to said reflective member; anda photodetector for registering said reflective beam, wherein said reflected beam is indicative of a surface condition of said disk.