| 摘要 |
Apparatus for inspecting a container that includes a first light source for generating light energy of a first character and directing the light energy onto a predetermined portion of a container under inspection, and a second light source for generating light energy of a second character different from the first character and directing such light energy onto the same predetermined portion of the container under inspection. An area array light sensor is disposed to receive a two- dimensional image of the portion of the container illuminated by the first and second light sources. The first and second light sources are sequentially and alternately strobed, and first and second two-dimensional images of the container portion under inspection are downloaded from the sensor. Commercial variations that affect optical properties of the containers are identified by comparing the first and second two-dimensional images from the respective light sources scanned from the sensor. The sensor preferably includes facili ty for scanning two-dimensional images in sequential frames, and the first and seco nd images are obtained by scanning sequential frames from the sensor during which the first and second light sources are alternately strobed.
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