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  4. Vorrichtung zum Fokussieren eines Lichtstrahles in mehreren Fokuspunkten
 
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Patent
Title

Vorrichtung zum Fokussieren eines Lichtstrahles in mehreren Fokuspunkten

Other Title
Device for focussing a light beam in at least two focal points
Abstract
The description refers to a device for focussing a light beam in at least two focal points, comprising a mirror element, which splits the light beam in a number of partial beams corresponding to the number of focal points. The invention is characterized by the following features: - The mirror element has a number of mirror surfaces corresponding at least to the number of focal points, said mirror surfaces contacting a longitudinal line and whose surface normals along said line subtending an angle greater than or less than 0<degrees>, - the mirror element is movable to vary the beam intensity in each of the focal points and vary the distance of each focal point relative to the impinging light beam.
Inventor(s)
Behler, K.
Beyer, E.
Schmidt, H.
Link to Espacenet
http://worldwide.espacenet.com/publicationDetails/biblio?DB=worldwide.espacenet.com&locale=en_EP&FT=D&CC=DE&NR=4024299A
Patent Number
1990-4024299
Publication Date
1993
Language
German
Fraunhofer-Institut für Lasertechnik ILT  
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