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    • 8. 发明公开
    • Liquid reflective mirror shaped by magnetic field
    • ReflektierendeFlüssigspiegelderen Form durch ein Magnetfeld erzeugt wird
    • EP1361585A1
    • 2003-11-12
    • EP03356075.6
    • 2003-05-07
    • Université Laval
    • Borra, ErmannoRitcey, AnnaLaird, Philip R.
    • H01F1/44G02F1/09G02B1/06G02B5/08
    • H01F1/445G02B5/10G02B26/0825H01F1/44
    • This invention relates to a new type of reflective optical element made of a fluid that responds to a force if subjected to a magnetic field. As a consequence, one can impose any shape one wants to the reflecting surface by generating an appropriate magnetic field geometry with permanent magnets, electromagnets or a combination of permanent magnets and electromagnets, or the like. A preferred embodiment uses a ferromagnetic fluid made of water containing ferromagnetic nanoparticles. Liquid ferromagnetic surfaces thus obtained were successfully shaped using magnetic fields. In another preferred embodiment, to modify the reflectivity of the optical element, a reflective layer, such as a nano-engineered silver reflecting surface, is deposited on the surface of the magnetically sensitive fluid. The surface of the reflecting layer can therefore be warped by applying a magnetic field to the fluid. Coated or uncoated magnetically deformable liquid surfaces with reflective layers allows one to make inexpensive and versatile high-quality reflecting mirrors having complex shapes. The shapes of the reflecting surfaces can be changed within short time periods by changing the shapes of the magnetic fields.
    • 本发明涉及一种新型的反射光学元件,它由一个受到磁场的力作响应的流体制成。 因此,可以通过用永磁体,电磁体或永磁体和电磁体的组合等产生适当的磁场几何形状来将任何想要的形状施加到反射表面。 优选实施例使用由含有铁磁性纳米颗粒的水制成的铁磁流体。 由此获得的液体铁磁表面使用磁场成功地成形。 在另一个优选实施例中,为了改变光学元件的反射率,反射层(例如纳米工程银反射表面)沉积在磁敏感流体的表面上。 因此,可以通过向流体施加磁场来使反射层的表面变形。 具有反射层的涂覆或未涂覆的可磁化变形的液体表面允许制造具有复杂形状的廉价且通用的高品质反射镜。 可以通过改变磁场的形状来在短时间内改变反射表面的形状。