Abstract: A rangefinder apparatus with an optoelectronic arrangement for determining a height profile of an object. The apparatus has a transmitter that emits light rays, a deflection unit that deflects the transmitted light rays and guides them over the surface of an object to be measured, and a receiver that receives light rays reflected from the object. The deflection unit includes a transmitting optic arranged downstream of the transmitter and an actuator which moves the transmitting optic to periodically deflect the transmitted light. A receiving optic is arranged in front of the receiver at a distance from the transmitting optic so that the beam axis of the transmitting light rays penetrates the transmitting optic and the beam axis of the received light rays that penetrate the receiving optic extend at a distance to each other.

Abstract: An optoelectronic device for identifying a mark having a defined contrast pattern includes a transmitting element for emitting a beam of transmitted light. A deflector unit periodically guides the transmitted light beam over the mark. A receiving element receives the transmitted light beam after being reflected by the mark and produces an analog received signal which exhibits an amplitude modulation impressed by the contrast pattern of the mark and is dependent on the spatial intensity distribution of the transmitted light beam. An n-bit analog-digital converter has a word width greater than 1 for converting the analog received signal into a digital received signal. A digital filter includes an input for receiving the digital received signal.

Abstract: An optoelectronic device for recognizing marks provided with defined contrast patterns includes a transmitting element that transmits a light beam and a receiving element. The beam of transmitted light is guided across the marks, and the received beam of light reflected from a mark exhibits an amplitude modulation which is impressed by the contrast of the mark and is dependent on the spatial course of intensity of the transmitted light beam. The received light in the receiving element is converted into an analog received signal. The analog received signal is converted, in an n-bit analog/digital converter, into a digital received signal which is supplied to a digital filter whose transmission characteristic is essentially equivalent to the inverse of the frequency spectrum of the spatial distribution of intensity of the transmitted light beam at the location of the mark.

Abstract: An optoelectronic apparatus is provided for identifying marks comprised of defined contrast patterns, particularly barcode symbols. The device includes a transmitting element which emits transmitted light and a receiving element. The transmitted light is guided across the marks, and the received light reflected by the marks has an amplitude modulation imposed by the contrast of the marks, with the received light being converted into a voltage signal that forms the received signal in the receiving element. The voltage signal is converted into a binary signal and filtered by an arrangement of digital filters for compensation component stipulated distortions prior to being fed to a threshold-value unit for evaluation of the contrast pattern.