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

Claim 2:
3. The apparatus of claim 1, wherein:
the at least one light sensor comprises first and second spaced-apart light sensors;
the first light sensor is part of a first light sensor sub-assembly that comprises the first light sensor and a first filter;
the second light sensor is part of a second light sensor sub-assembly that comprises the second light sensor and a second filter;
the first and second 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;
the first filter of the first light sensor sub-assembly is for filtering out light energy outside of the absorption wavelength;
the second filter of the second light sensor sub-assembly is for filtering out light energy outside of the reference wavelength; and
the processor is in communication with the first and second light sensors, and wherein the processor is programmed to compute the wall thickness of the portion of the transparent hollow article based on the intensity of light energy sensed by the first and second light sensors.