1. An optical sensor device, comprising: a) a plurality of sensor regions; b) a plurality of objectives that are arranged such that each objective generates a primary image of one of the sensor regions, wherein at least one of the objectives has a numerical aperture larger than 0.1 and comprises several lenses; c) a light detector with an array of detector pixels; d) intermediate optics that maps primary images of the objectives onto the detector plane, wherein at least one primary image is mapped onto the whole detector plane; and e) a light source for generating an input light beam (L) that is directed towards the sensor regions.