Patent ID: 8736828

Claim:
A method for inspecting a contact lens for defects when the contact lens is disposed in a cavity between a male mold and a female mold, the method comprising: illuminating the contact lens using direct light rays and angular light rays; capturing light rays emerging from the contact lens by a two-channel imaging optical system; configuring a first channel of the two-channel imaging optical system to capture the light rays emerging from a center zone of the contact lens; configuring a second channel of the two-channel imaging optical system to have an entrance pupil in a different position than an entrance pupil of the first channel of the two-channel imaging optical system, to capture the light rays emerging from a peripheral zone of the contact lens; capturing individual images using light rays entering each of the two channels of the two-channel imaging optical system, or capturing a single composite image from the two-channel imaging optical system; and processing the two images or the single composite image to detect defects in the contact lens.