Patent ID: 11872743
Assignee: AGR INTERNATIONAL, INC.
Field: Measurement (Instruments)
Classification: CPC B  G | IPC B  G

Claim 21:
22. A method of manufacturing a transparent hollow article, the method comprising:
forming the transparent hollow article with an article-forming apparatus; and
after forming the transparent hollow article, inspecting the transparent hollow article with an inspection system, wherein inspecting the transparent hollow article comprises:
sequentially emitting light energy, by first and second light sources, at a portion of the transparent hollow article as the transparent hollow article moves along a travel path past the first light source, wherein:
the first light source emits light energy at a first, absorption wavelength that is primarily absorbed by the portion of the transparent hollow article; and
the second source emits light energy at a second, reference wavelength that is not primarily absorbed by the portion of the transparent hollow article;

sensing, by a light sensor, light energy emitted by the first and second light sources that is reflected by the portion of the transparent hollow article to the light sensor, wherein the light sensor is on the same side of the travel path of the transparent hollow article as the first and second light sources; and
computing, by a processor of the inspection system that is in communication with the light sensor, a wall thickness of the portion of the transparent hollow article based on an intensity of light energy sensed by light sensor.