第一种模式中，光子经过偏振处理，转为垂直方向或水平方向振动。
In the first, a photon is polarised either vertically or horizontally.
正常光线向各个方向振动垂直的飞行；但是偏振光只有在一个平面上振动。
Regular light vibrates in all directions perpendicular to its direction of travel; polarized light, however, vibrates only in one plane.
或者，校准可以通过使用一个偏振标准品来进行，该标准品由一片装在垂直于右侧通道的架子上的石英构成。
Alternatively, calibration may be checked using a Polarization Reference Standard, which consists of a plate of quartz mounted in a holder perpendicular to the light path.
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