Optical system for imaging, collimating or focusing laser radiation, has lens group with focal length, where lens group has lens made from material, such as quartz glass, and another lens group with the focal length

摘要

The optical system has a lens group (10) with the focal length, where the lens group has a lens made from a material, such as quartz glass, and another lens group (20) with the focal length. The letter lens group is provided with another lens made from another material, such as calcium fluoride or sapphire. The beam radii (15,25) stand to each other in both lens groups in a ratio that lies in a value area. A correction factor lies for lenses with positive refractive power and for lenses with negative refractive power.