Apparatus for selectively steering a laser beam having an optical control element such that the wavelength of the beam is variable

摘要

The apparatus steers an input laser beam into first and second output laser beams. The apparatus has a beam splitter element to spatially split the beam into first and second sub-beams. A beam superimposing element superimposes the sub-beams and guides them into the first and/or second output beams. The intensity of the output beams depends on a relative phase shift between the sub-beams. An optical control member in the first sub-beam is arranged such that the optical wavelength of the first sub-beam between the beam splitter and the superimposing element is variable. Independent claims also cover a laser treatment apparatus.