摘要:
The present invention relates to a laserinterferometric process, in particular, for use in etching thin layers, whereby a layer to be examined is radiated with a laser passing over a surface of the layer and the intensity of the reflected laser beam, which is composed of a beam reflected from the surface of the layer to be examined and one reflected from its lower interface is ascertained and evaluated by a data processing system from which the information concerning the layer to be examined is read out. The present invention also relates to an imaging laserinterferometer comprising a modulator, which deflects the laser beam, a detector for the reflected laser beam and a data processing systen, which analyzes the detector signals.
摘要:
Disclosed is a wheelchair, particularly an electric wheelchair, comprising a frame (20), at least one steerable wheel (3), two non-steerable wheels (5) which are connected to the frame (20) at a wheelbase (R), and a seat (10) that is fastened to the frame (20) and is provided with a back rest (8). The inventive wheelchair is characterized by the fact that the wheelbase (R) is adjustable.
摘要:
Disclosed is a wheelchair, particularly an electric wheelchair, comprising a frame (20), at least one steerable wheel (3), two non-steerable wheels (5) which are connected to the frame (20) at a wheelbase (R), and a seat (10) that is fastened to the frame (20) and is provided with a back rest (8). The inventive wheelchair is characterized by the fact that the wheelbase (R) is adjustable.