Patent ID: 7123354

Claim:
An optical position measuring arrangement, comprising: an incremental measuring graduation; a scanning unit, which can be moved in relation to said incremental measuring graduation along a measuring direction and by which position-dependent incremental signals are generated from scanning said measuring graduation, and wherein said scanning unit comprises: a transparent support substrate; at least two incremental signal scanning arrangements arranged in said measuring direction, each of said at least two incremental scanning arrangements comprises a light source and several incremental signal detector elements arranged distributed around said light source, by which partial incremental signals are generated from scanning of said incremental measuring graduation, wherein said at least two incremental signal scanning arrangements are arranged on a side of said support substrate facing away from said incremental measuring graduation; and several fields with scanning gratings, each of said several fields is spatially assigned to corresponding ones of said incremental signal detector elements and is arranged between said at least two incremental signal scanning arrangements and said support substrate, wherein said scanning gratings are arranged in such a way that partial incremental signals with predetermined phase relations are generated from said incremental signal detector elements.