Jenoptik Optical Systems Gmbh

Joerg Wunderlich

Jan Werschnik

Ullrich Krueger

Juergen Weise

Tim Baldsiefen

Birgit Massino

The invention relates to a device () for optical beam expansion of an optical system having a guide tube (), a first guide cylinder () having a first lens (), wherein the first guide cylinder () is arranged within the guide tube () so as to be displaceable along the longitudinal axis of the guide tube (), and a second guide cylinder () having a second lens (), wherein the second guide cylinder () is arranged within the guide tube () so as to be displaceable along the longitudinal axis of the guide tube (). A first displacement device is provided to displace the first guide cylinder () along the longitudinal axis () of the guide tube (), and a second displacement device is provided to displace the second guide cylinder () along the longitudinal axis of the guide tube ().

Device for optical beam expansion, optical system, and method for setting a spacing of two lenses of a device for optical beam expansion

An F-theta objective is provided that has five individual lenses with a first individual lens as biconcave lens with a focal length, a second individual lens as meniscus with a focal length, a third individual lens as meniscus with a focal length, a fourth individual lens as a biconvex lens with a focal length and a fifth individual lens as a plano-convex lens with a focal length and a total focal length f of the F-theta objective. A ratio between the focal lengths to the total focal length satisfies predetermined conditions.

F-theta objective

An F-theta objective which is color-corrected for a wavelength range of 1065-1075 nm and is suitable for high laser outputs of more than 1 kW, having sixth individual lenses L-L, wherein the lenses are formed of at least two different materials.

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Brahmenau, Germany

Joerg Wunderlich