The divergence Angle of light beam was measured with the method of CCD imaging and computed by second moment method.

通过CCD成像方法对准直后的光束发散角进行了测量，利用二阶矩算法计算出光束发散角。

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Colors on this thing span the Skittles rainbow of green, orange, red, blue and a new metallic blue, Azzurro Thetys, whose tone varies with the angle of the light.

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"Light coming in at a high angle will illuminate the sides of the blades, causing them to retreat away, " he explained.

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The display offers a wide 176-degree angle of view and is bright enough to compose images even in harsh midday light.

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