Linotype-hell Ag

Thomas J Harig

Manfred Maul

In an optical positioning system for at least two picture elements, a wavelength-dispersive, first light-deflecting element is used which deflects light beams in a first deflection direction according to their wavelength. In order to enhance the positioning speed, the optical system comprises a narrow-band light source with a controllable wavelength for every picture element. The first light-deflecting element is arranged in the beam path of a second light-deflecting element with which an additional, essentially wavelength-independent deflection can be implemented. The range of deflection of the first light-deflecting element is thereby noticeably smaller than that of the second light-deflecting element. The ray beams of the said light sources charge or impinge upon the wavelength-dispersive element in common. By setting the wavelength of its light source, each of the picture elements simultaneously receives a desired image position in the range of deflection of the second light-deflecting element around the basic position prescribed by it.

Optical positioning system for at least one picture element

An apparatus for deflecting an optical beam is designed as a prism and has an entry face as well as two reflection faces and two exit faces. The prism is essentially symmetrically constructed with reference to a rotational axis. The entry face is oriented essentially perpendicularly relative to the rotational axis. Those sides of the prism facing away from the entry face are designed as reflection faces having an inclination relative to the rotational axis, these reflection faces adjoining one another in the region of the rotational axis. Those sides of the prism facing away from the rotational axis are designed as exit faces which adjoin the entry face and the respective reflection face and, proceeding from the entry face, extend with increasing distance from the rotational axis.

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Eppstein, Germany

Thomas J Harig