Dr. Ing. Rudolf Hell Gmbh

Linotype-hell Ag

Ulrich Parl

Holger Suhr

Ralf Balzeit

Lutz Rebetge

Manfred Deisler

Helmut Lange

Horst Lachenmann

Klaus Andree

The system deflects an optical beam and is composed of at least one prism. The prism is provided with at least one reflection face and is rotationally seated with respect to a rotational axis. In order to achieve high speeds, at least regions of the prism are provided with an outside contour designed essentially rounded.

Light beam deflection means

A light transmission device for transmitting light from a stationary light source to a movable recording element of an electronic reproduction device composed of at least one fiber optical light waveguide and one guide element for the fiber optical waveguide. Due to the motion of a fiber optical waveguide, inhomogeneous light distributions arise at its exit face, this leading to disturbing streaked exposures of the recording medium. In the present invention to avoid such streak-like exposures, it is proposed that the guide element be a metal band which is mounted in a U-shape with the fiber optical waveguide being connected to one side of the metal band. Thus, as the recording element shifts, the curvature of the fiber optical waveguide remains constant to prevent shifting of the light distribution exiting the fiber optical waveguide.

Device for light transmission

An opto-electronic scanning head for drum and flat bed scanning apparatus for point-by-point and line-by-line scanning of opaque and transparent originals which are illuminated point-by-point. The housing of the scanning head 7 has a front panel 9 which is displaceable along the optical axis 12 of the scanning objective lens 11 and has a housing part which is stationary with respect to the optical axis 12. The scanning objective 11 is mounted in the front panel 9, but the diaphragm 13 and the opto-electronic transducer 14 are mounted in the housing portion 8. The scanning objective 11 can be displaced over a broad range with a sensitive adjustment mechanism for the front panel 9 so that the focus range can always be placed into the image plane of the originals and thus optimum image sharpness can be achieved for originals having all different thicknesses. In the scanning head 7 for opaque scanning, the illumination system 27, 28, 29, and 31 is used for the point to point illumination of the originals and the illumination system is arranged in the displaceable front panel 9 such that the optical axis 30 extends through the focus range of the scanning objective 11 and as a result the illumination system 27, 28 and 29 always generates a focus illumination point on the original regardless of the position of the front panel 9 or of the scanning objective 11 so that optimum illumination of the originals is always achieved for all thicknesses of originals and also the optimum image is maintained sharp.

Opto-electronic scan head which has a housing portion and a housing

Growing community of inventors

Raisdorf, Germany

Ulrich Parl