Lens assembly for an optical encoder

摘要

Sampling unit for a position measurement arrangement for optical sampling of a measurement body has a light source for emission of light towards the body, a detector for receipt of light that is modified by the measurement body and an arrangement of lenses prior to the detector that generates an image at the detector of the sampled area of the measurement body. The lateral amplification of the lens arrangement (3, 4) is greater than zero and less than or equal to two. The invention also relates to a corresponding position measuring arrangement with a measurement body that has at least one track (21, 22) that can be optically sampled and an inventive sampling unit.