Illumination system for ophthalmic lens inspection

Details Illumination system for ophthalmic lens inspection Illumination system for ophthalmic lens inspection

G - Physics

01

M

G01M 11/02 (2006.01)

Patent

CA 2111811

A system for providing diffuse illumination in the inspection of ophthalmic lenses for use in conjunction with a computer-based lens inspection apparatus. Below a package containing an ophthalmic lens in deionized water is an optical diffuser made of flashed opal and below that a light source such as a strobe light. The strobe lamp firing is initiated by the image processing system which is in turn triggered by a signal generated by the arrival of a package containing a lens to be inspected. In the preferrerd embodiment, an arc tube is employed wherein light output diminishes by darkening only in one end of the tube, that end placed outside the reflector.

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