Fringes are formed when the optical difference (OPD) between a reference wave front and a test wave front based on the interference of light is an integral multiple of the illuminating wavelength.
测试中，当测试波前相对于参考波前的光程差是照明波长的整数倍时形成干涉条纹，由此而形成的二维图就是干涉图像。
The reflected light intensity distribution of the laser beam illuminating the surface of a specimen will broaden as the surface roughness increases.
照射在样品表面的激光束随着表面粗糙度的不同，反射光密度分布将不同；表面粗糙度增大时，反射光密度将被扩展。
The invention relates to a projection-type head lamp capable of reinforcing light in a dark space, which comprises a lamp holder, an illuminating part, a shading plate and a light guide plate.
一种可补强暗区光线的投射式头灯，包含：一灯座、一发光件、一遮光板，以及一导光板。
The invention further provides an assembly comprising a fluid-flllable container(4), a light source for at least locally illuminating the interior of the container (4) and an optical detector.
本发明还提供一种组件，该组件包括可填充流体的容器（4）、用于至少局部地照射容器（4）的内部的光源和光学 检测器。
A new optical profilometry linearly coded profilometry is presented. It USES a periodic linear structure illuminating light to code the surface and the phase shifting technique to decode the phase.
提出一种新的光学轮廓术线性编码轮廓术，它利用周期线性结构光编码三维物面，并辅以相移技术来解调相位。
A new optical profilometry linearly coded profilometry is presented. It USES a periodic linear structure illuminating light to code the surface and the phase shifting technique to decode the phase.
提出一种新的光学轮廓术线性编码轮廓术，它利用周期线性结构光编码三维物面，并辅以相移技术来解调相位。
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