Patent ID: 8208141

Claim:
A system for measuring a property of a blow-molded container, the system comprising: a plurality of emitters, wherein at least a first portion of the plurality of emitters is configured to emit light energy at a first wavelength band and at least a second portion of the plurality of emitters is configured to emit light energy at a second wavelength band as the container passes through an inspection area, wherein the plurality of emitters are configured such that emissions in the same wavelength band from spatially adjacent emitters are offset in time; a plurality of detectors, wherein each of the plurality of detectors is aligned to receive light energy emitted by at least one of the plurality of emitters and is sensitive to light energy in the first wavelength band and in the second wavelength band; and at least one processor in communication with the plurality of emitters and the plurality of detectors, wherein the at least one processor is programmed to: receive from the plurality of detectors a first signal indicating light energy in the first wavelength band received by at least one of the plurality of detectors through the blow-molded container; receive from the plurality of detectors a second signal indicating light energy in the second wavelength band received by at least one of the plurality of detectors through the blow-molded container; and determine a characteristic of the blow-molded container considering the first signal and the second signal.