Abstract: An apparatus for reproducing a digitized image from a semiconductor memory onto a light sensitive material using a plurality of movable equally spaced light sources. The sources direct light beams through apertures in a mask, movable with the sources, onto a sheet of the material disposed on a drum. The light sources emit beams of variable intensity responsive to image data recorded in memory devices. As the drum rotates, the mask and light sources move in unison longitudinally at a rate of one pixel width per drum revolution. One embodiment of a recording module comprises only light sources and mask, while another embodiment also includes a pair of lens arrays that image the beam onto the sheet. There are an integral number of pixel widths between adjacent beams. A plurality of parallel lines on the mask and a scanner fixed relative to the drum sense the relative position between the mask an the drum for providing corrective feedback information to a motor moving the mask and light sources.

Abstract: An apparatus for digitizing an image on a film material using a plurality of movable equally spaced light detectors. Light sources direct light through a sheet of the material disposed on a transparent drum. The light which is transmitted is imaged onto light detectors through apertures in a mask. As the drum rotates, the mask and light detectors move in unison longitudinally at a rate of one pixel width per drum revolution. One embodiment of a scanning module comprises only light detectors and mask, while another embodiment also includes a pair of lens arrays that image the sheet onto the detectors. There are an integral number of pixel widths between adjacent detectors. A plurality of parallel lines on the mask and a scanner fixed relative to the drum sense the relative position between the mask and the drum for providing corrective feedback information to a motor moving the mask and light detectors.

Abstract: A method for reading deformation images recorded on electrophotographic media involving scanning of an image surface and measuring microscopic surface tilt in a reflected beam. In one embodiment, the deformation image is scanned telecentrically and in another embodiment the surface is scanned with a beam at angles to the surface. By intercepting the retroflected beam and measuring the deviation of the reflected beam from the scanning center, a number of proportional-to-surface tilt is found. By then electrically integrating over neighboring regions, an electrical or optical pattern, reimaging the deformation image, may be constructed.

Abstract: A servo system for a braked accelerative transport in which a signal representing velocity of a carriage within the transport is compared to a first reference signal representing desired carriage velocity. The comparison yields an error signal which is used to adjust the brake of the transport. A hydraulic valve having an adjustable needle is used as the brake. A second selectable reference signal is provided so that the first reference signal can be bypassed when the carriage is reset at high velocity or is at reset. The valve is also bypassed on reset so that the adjusted brake mechanism is left intact on reset.