Patent ID: 7671992

Claim:
A measuring device for photoelectrically measuring a measurement object on the basis of image elements, comprising: (a) a measuring unit that is adapted to simultaneously photoelectrically scan a plurality of image elements of a measurement object disposed in a line and generate associated measurement signals for every scanned image element, (b) a lighting system for applying illuminating light to the image element of the measurement object, (c) a wavelength range-selective photoelectric receiver unit, and (d) optical pick-up means which pick up the measurement light reflected by the illuminated image elements of the measurement object and direct it to the photoelectric receiver unit, wherein the photoelectric receiver unit converts the measurement light directed to it from the image elements of the measurement object into corresponding measurement signals for the image elements of the measurement object, wherein the lighting system has a plurality of parallel linear-shaped arrays of light-emitting diodes which apply illuminating light to the measurement object in a number of parallel illuminating strips, wherein the lighting system has means for limiting the angle of incidence range so that essentially every image element disposed in the illuminating strip and illuminated receives light at an angle of incidence range standardized for color measuring applications, wherein the photoelectric receiver unit has a number of parallel photoelectric line sensors disposed at a distance apart corresponding to the number of illuminating strips which are oriented parallel with the longitudinal extension of the illuminating strips and are sensitized to different wavelength ranges by color filters connected upstream, wherein the optical pick-up means has a number of linear optical arrays corresponding to the number of line sensors which are each oriented parallel with the illuminating strips and direct measurement light reflected from an image line within the illuminating strips onto one of the respective line sensors, and the linear optical arrays are configured so that the measurement light from essentially every image element of the image lines is picked up at only an angle of reflection range for standard color measuring applications, and wherein the illuminating strips with the associated linear optical arrays and line sensors are optically screened from one another so that measurement signals from image lines in adjacent illuminating strips do not mutually affect one another.