| abstract |
A detector for optical detection of at least one object includes: at least one longitudinal optical sensor including at least one sensor region, and configured to generate at least one longitudinal sensor signal dependent on an illumination of the sensor region by a light beam, wherein the longitudinal sensor signal, given same total power of the illumination, is dependent on a beam cross-section of the light beam in the sensor region, wherein the sensor region includes at least one thermoelectric unit configured, upon illumination of the sensor region or a part thereof by the light beam, to generate the longitudinal sensor signal resulting from at least one of a spatial variation or a temporal variation of a temperature in the thermoelectric unit; and at least one evaluation device configured to generate at least one item of information on a longitudinal position of the object by evaluating the longitudinal sensor signal. |