这个场景中的照明分为主光源，反射光源和一个背光。
The lighting setup for this piece consisted of a main, specular and a back light (Fig. 06).
一个解决方案就是使用漫反射光源而不是激光，O'Brien先生说。
One solution is to use a diffuse light source rather than a laser beam, says Mr O'Brien.
用LED作为宽带光源所得到的反射光谱可用于实际样品的微位移测量。
LED was used as broad_band source to attain reflection spectrum and measure tiny_displacement of practical sample.
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