improved systems for optical inspection are provided . the improved systems use modified camera boxes to provide increased , and more uniform , illumination of the objects being inspected through the use of illuminator windows . the lens arrangement of the improved camera boxes is contained within a self - contained , sealed housing that is separate from the camera to prevent particle contamination of the lens arrangement and provide improved flexibility during installation of the camera boxes on the inspection systems . the self - contained housing also provides for a reduction in the space required for the camera boxes . the light receiver of the housing is provided with the capability for preventing particle contamination of the receiver itself .