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

Claim 20:
21. 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:
emitting light energy, by at least one light source of the inspection system, at a portion of the transparent hollow article as the transparent hollow article moves along a travel path past the at least one light source, wherein the light energy emitted by the at least one light source comprises:
light energy at a first, absorption wavelength that is primarily absorbed by the portion of the transparent hollow article; and
light energy at a second, reference wavelength that is not primarily absorbed by the portion of the transparent hollow article;

sensing, by both first and second, spaced-apart, light sensor sub-assemblies of the inspection system, light energy emitted by the at least one light source that is reflected by the portion of the transparent hollow article to the light sensor assembly, wherein:
the first and second, spaced-apart, light sensor sub-assemblies are on the same side of the travel path of the transparent hollow article as the at least one light source; and
each light sensor sub-assembly comprises:
a light sensor for sensing the light energy emitted by the at least one light source that is reflected by the portion of the transparent hollow article to the light sensor assembly and a filter, wherein sensing the light energy comprises:
 filtering out, by the filter of the first light sensor sub-assembly, light energy outside of the absorption wavelength; and
 filtering out, by the second light sensor sub-assembly, light energy outside of the reference wavelength; and

computing, by a processor of the inspection system that is in communication with the first and second, spaced-apart, light sensor sub-assemblies, a wall thickness of the portion of the transparent hollow article based on an intensity of light energy sensed by both the first and second, spaced-apart, light sensor sub-assemblies.