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    MULTI-WAVELENGTH LASER BEAM HOMOGENIZER-EXPANDER LIGHT ENGINE
    1.
    发明公开
    MULTI-WAVELENGTH LASER BEAM HOMOGENIZER-EXPANDER LIGHT ENGINE 审中-公开

    公开(公告)号：EP4286919A1

    公开(公告)日：2023-12-06

    申请号：EP22175968.1

    申请日：2022-05-29

    申请人： Laserworld (Switzerland) AG

    发明人： Luque, Jordi

    IPC分类号： G02B27/09 ,  G02B27/10 ,  G02B27/14

    摘要： Provided is an invention related to laser beam shaping with the goal to achieve a controlled intensity profile, usually top-hat distribution, created by several laser beam sources with incident non-uniform beam intensity profile (incident gaussian laser beam/s or other higher order multi-transverse modes, in the visible, IR or UV spectrum).
    The Laser beam homogenizer-expander uses a first beam shaper element to divide the incident beams into beamlets along the main optical axis, and a second beam shaper element i.e., 2nd light integrator which defines the top-hat intensity distribution output, thus providing a 2nd homogenization stage.
    The invention also includes several light diffusers (F1, F2), mirrors, filters (D1, D2), and output lenses (L1, L2, L3), to achieve a good homogenization at the desired output angle which are described in detail in the following.
    The invention is designed to fully integrate/blend one or several wavelength laser sources, like red, green, and blue as an example, but other wavelengths in the visible/non-visible spectrum can be integrated as well.
    If multi-wavelengths are used as initial laser source (LS1), the light engine output provides a good homogenization and color blend, with almost no noticeable speckle, near top-hat intensity profile and no visible hot spots or interference patterns.
    The invention is useful for many applications, like microscopy, material processing, fluorescence, lighting fixtures, holography, fiber coupling etc., where spectral properties of laser light is required (narrowband, monochromaticity) but a uniform distribution of the intensity is necessary at the same time.