Degree of absorption along and perpendicular to the main optical axis was studied for some uniaxial minerals, using several types of spectrophotometers.
用几种分光光度计研究了一些一轴晶矿物平行和垂直于主光轴方向的吸收程度。
The main light-emitting diodes are fixed to the light body in such a way that the optical axes thereof cross the light axis in the center of a light spot.
多个主发光二极管固定在照明本体上，以这样的方式它们的光轴与光轴在照明区的中心交叉。
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