The method has been successfully used in the system for measuring the 3-d surface topography of diffractive optical elements.

此方法已成功地应用于自行研制的衍射光学元件三维表面形貌测量系统中。

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It can be expected to have practical applications in the fields of true-color display holography, wavelength multiplexing holographic storage, and holographic optical elements.

预期该材料可在真彩色全息显示、多波长全息存储、全息光学元件的制作等方面有较好的应用价值。

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All parts of the device are made up of passive optical elements.

整个器件全部采用无源光学元件实现。

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CDM's imaging system, it passes first through conventional optical elements, and then through a lens moulded into a shape of a cubic-like function (ie, with a surface which, instead of being spherical, is relatively flat in the centre but has scalloped edges).

ECONOMIST: MONITOR

Both include Balanced Optical SteadyShot, which moves the entire lens module (not just specific elements) for much more effective stabilization, especially when zoomed in.

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"Theoretically if you construct the elements we've made at terahertz frequencies, make them even smaller and then scale them up to optical frequencies, you could have perfect lensing at those frequencies, " said co-author Dr Willie Padilla of the University of California, San Diego.

BBC: Last Updated: Monday, 8 March 2004, 09:03 GMT