Abstract: An optoelectronic device for acquisition of images, such as images of bar codes, includes a case which contains an electronic scanning sensor, an illumination source and optics including a diaphragm that permit the formation of images on the sensor. The optics include at least two diopters disposed between the diaphragm and the sensor. For example, the diopters may take the form of a revolved symmetrical lens, the useful part of which is convex, and a cylindrical lens which does not create any deflection in a plane parallel to the optical plane, and is convergent in a plane perpendicular to the parallel plane.

Abstract: The invention concerns an oplo-electronic device for acquisition of images of codes in one and two dimensions, comprising an electronic sensor constituted by a high-resolution photosensitive matrix, an analog/digital converter to convert the data emitted from the electronic sensor, and an image acquisition and processing module, comprising a preprocessing module and two processing modules, forming a pipe-line type architecture. The preprocessing module, acts in synchronous mode on the flow of digital data and implements simple image-processing operations. A number of cabled processing units can form the preprocessing modules. The processing modules, are constituted by programmable modules acting in asynchronous mode on the data emitted from the preceding module and stored in alternative manner in two memory blocks.

Abstract: The invention relates to a device and a process for acquiring bichromatic bar codes, with a two-dimensional sensor with electronic scanning. The height Hy of the scanned portion is modified between at least two successive scanning operations. Thus, the device is or may be adapted to the type and/or to characteristics not known in advance of the code to be read.

Abstract: A barcode label reader comprises a read window having a longer dimension parallel to an X axis and a lens system with an optical axis Y substantially normal to the window at its center which projects a conjugate image of a read line of the label onto a CCD type strip which is scanned sequentially to form a signal representing the barcode carried by the label. A strip of light-emitting diodes is disposed outside the X-Y plane to illuminate the label through the read window. A prismlike lens in the form of two refractors separated by a slot in the X-Y plane deflects the beam emitted by this strip so that it is substantially parallel to the X-Y plane. Thus, the depth of field of the reader is limited only by the aperture of the lens system.