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    • 35. 发明申请
    • IMAGING APPARATUS AND METHODS
    • 成像装置和方法
    • WO2008032061A2
    • 2008-03-20
    • PCT/GB2007/003455
    • 2007-09-12
    • UCL BUSINESS PLCKIRKBY, Paul AnthonySILVER, Robin AngusNADELLA, K.M. Naga Srinivas
    • KIRKBY, Paul AnthonySILVER, Robin AngusNADELLA, K.M. Naga Srinivas
    • G01N21/6458G02B21/0024G02B21/0036G02F1/0072G02F1/33G02F1/332G02F2201/16G02F2203/28
    • Methods, systems and apparatus for manipulating electromagnetic radiation such as laser beams. A method and apparatus for correcting magnification chromatic aberration utilises one or more dispersive lenses such that long wavelength components are magnified less than short wavelength components. A telecentric relay is preferred to achieve this aim. Further, the use of polarisers to block the undesired zeroth order components of diffraction emanating from acousto-optic deflectors (AODs) is disclosed. Furthermore, specific designs of AOD including narrow transducer AODs which produce a diverging acoustic wave and AODs having two transducers and a selection switch are disclosed. Further, the invention provides methods, systems and apparatus for allowing the wavelength of radiation to be changed, for providing a user selectable degree of compensation, for providing a scanning and/or a pointing system and for providing a compact system that does not require telecentric relays between adjacent acousto-optic deflectors.
    • 用于操纵诸如激光束之类的电磁辐射的方法,系统和装置。 用于校正倍率色差的方法和装置利用一个或多个分散透镜,使得长波长分量放大小于短波长分量。 远心继电器是实现这一目标的首选。 此外,公开了使用偏振器阻挡从声光偏转器(AOD)发出的衍射的不希望的零级分量。 此外,公开了包括产生发声声波的窄传感器AOD和具有两个换能器的AOD和选择开关的AOD的具体设计。 此外,本发明提供了用于允许改变辐射波长的方法,系统和装置,以提供用户可选择的补偿程度,用于提供扫描和/或指示系统,并提供不需要远心的紧凑系统 相邻声光偏转器之间的继电器。