Abstract: An integrated X-ray and visual inspection system having an inspection subsystem with a holder holding an object to be inspected, an X-ray source, a camera receiving an X-ray image of an object to be inspected and a camera receiving a visible image of an object to be inspected, the X-ray source and camera receiving the X-ray image being positioned on opposite sides of the holder. A display may also be provided for displaying the images. The system is well suited to the inspection of printed circuit boards having electronic components mounted thereon, in which case the holder may be a conveyor for the printed circuit boards. Independent positioning of the X-ray source and camera receiving the X-ray image allows offset images of the printed circuit board topside and bottomside features of the board. Various other features of the system and methods are disclosed.

Abstract: Engraving apparatus with particular reference to a plate to be engraved having a photosensitive surface in which a write laser beam exposes anid surface by scanning the same in conjunction with a read optical path associated with a copy board positioned proximate the plate. Means, for example, such as a read laser beam scans the copy board, the reflection therefrom being noted and used to control the intensity of the write beam. The optical scanning elements of both the read optical path and the write beam are common to each so that positional error due to vibrations in the optical components is eliminated. Provision is made for read-right conversion to read-wrong during preparation of a plate, both by use of memory circuits and by geometrical arrangement. Independent width and length magnification, other than unity, are also provided.

Abstract: An electrophotographic apparatus for producing printing masters utilizing modulated laser light as the exposure source and a continuous process for producing such printing masters involving the steps of plate conveyance, synchronous charging and exposure, and electrostatic development and fusing of electrophotographic printing masters suitable for use in offset or lithographic printing processes. The apparatus comprises a transport system for sequentially conveying printing masters to the exposure platen which retains the masters in a fixed plane for synchronous charging and exposure, utilizing as a light source, a modulated laser beam. The optical and deflecting components of the exposure system are mounted in a moveable carriage member adapted to traverse a plane substantially parallel to the plane of the exposure platen such that the exposure laser will raster scan the platen area.

Abstract: Disclosed is a facsimile system having a transmitter for optically scanning input copy to produce modulated electrical signals to be transmitted to a receiver. The receiver responsively controls output optical scanning to form output copy as a reproduction of the input copy. Signal processing in both the transmitter and receiver employs spatial coding. In the transmitter scanner, a spatially coded reference signal, generated by the scanning beam and a spatial mask, is employed. In the receiver scanner, a spatially coded reference signal, generated by the scanning beam and an identical spatial mask is employed also. Therefore, the transmitter and receiver scanners are spatially synchronized without the need for real-time synchronization.