光像测定器

例句：

1. 1. Theoptics of the light beam arecrucial for accurate measurements.
   光束的光学性质对于精确测量至关重要。
2. 2. The spectrophotometer was used to analyze the chemical compositionof the sample.
   光谱仪被用来分析样品的化学成分。
3. 3. The photometer was usedto measure the intensity of the light source.
   光度计被用来测量光源的强度。