Abstract: Using marks of known dimensions and size, and spacing, a zoom lens may be calibrated in either or both the X and Y spatial directions. A system comprising an image capture device, positioning means, position encoder means, operator interface, and processing unit permits this method to be advantageously applied to a wide variety of web inspection/control functions, including but not limited to initial web registration, multiple color ink registration, lateral web positioning, repeat length calculations, image capture synchronization, thermal/mechanical differential compensation, and accurate registration of objects within an image to other objects within an image or to a mechanical reference on a machine.

Abstract: A system and method of backlighting a display is disclosed in which one or more light sources may be used to provide substantially appropriate uniform backlighting of a display medium and simultaneously provide a visually pleasing light source for a decorative display frame. The disclosed system and method provide for one or more light sources, a lightbox for the light sources, a light mask to provide uniform distribution of the illumination provided by the light sources, a display media container to secure and protect the visual media to be backlit, an optional decorative frame, and an offsetting structure to separate the decorative frame and/or lightbox from the display media container.The disclosed invention increases the visual appeal of photographs and other visual media while providing a compact and safe means for media display that eliminates the nonuniform illumination and heat buildup problems present in the prior art.