Abstract: Inspection equipment for detection of foreign matter particles in the bottom area of containers with transparent bottoms, such as glass bottles. The equipment has a driven rotor the front face of which lies in the image plane of a projection optic with the illuminated bottle bottom serving as the object plane. The rotor has a first optical element in the form of a radially extending mirror which focuses the incident radiation on a fixed position photoelectric element. The output signal of the photoelectric element feeds an evaluator which responds to a certain decrease of the incident light intensity. The rotor is provided with a second optical element which is responsive to radiation from the center of the container bottom and which signals a second photoelectric cell, which feeds a second evaluator.Both evaluators signal container reject mechanism.

Abstract: Inspection apparatus for detecting defects in the rim of bottles or containers includes a light sensing head made up of a mosaic of thirty to forty light sensors in the form of circular ring sectors supported on a platen and arranged around a central aperture. The sensing head is located above the bottles and inspects the bottles as they are conveyed through the inspection zone. A light source provides a beam through the central aperture which floods the mouth of the bottle with the light being reflected upwardly from the bottle rim to the various sensors which simultaneously sense light reflected from the entire bottle rim. The light sensor outputs are individually monitored and circuitry is provided to activate a bottle sorting device when an amplified output signal from any of the cells varies a predetermined amount from a normal signal value.