| abstract |
The invention relates to an apparatus (1) for non-incremental position and form measurement of moving solid bodies (7), containing a laser Doppler distance sensor (10) The measurement head is configured as a miniature measurement head (30), which splits the bichromatic laser light bundle (37) emitted from the transmitting fibre (24) in each case into two partial beam bundles (27, 28) using a beam-splitting grating (26), which partial beam bundles (27, 28) are made to superimpose in a location area by two deflection elements (29, 40) connected downstream. A lens (32) is arranged upstream of the beam-splitting grating (26) such that the beam waist (33) for one wavelength (λ 1 ) is located upstream of the measurement volume (31) and the beam waist (34) for the other wavelength (λ 2 ) is located downstream of the measurement volume (31). |