Patent ID: 11932445
Assignee: CORNING INCORPORATED
Field: Machine tools (Mechanical engineering)
Classification: CPC B  A  C  G  Y | IPC A  B  C  G

Claim 7:
8. A method of detecting an anti-counterfeit marking on a pharmaceutical package comprising:
directing a light source toward a surface containing the anti-counterfeit marking at a projection angle of from about 0° to about 45°, the projection angle being an angular spread of a light beam emitted by the light source as measured by a divergence of the light beam from a central axis of the light beam; and
projecting the anti-counterfeit marking onto an image plane for detection;
wherein the anti-counterfeit marking is not detectable through direct inspection or by direct illumination with the light source, and
wherein the light source comprises a wavelength and a phase that match a wavelength and a phase of an original light source used to create the anti-counterfeit marking.