| 1. | With the compensator in place any optical path difference arises from the actual path difference .
有了补偿板之后，任何光程差都只由实际程差引起。 |
| 2. | When the two light beams recombine , they interfere and form a pattern that depends on the difference between the distances they traveled
当两束光重遇后将发生干涉，并形成一个依赖于两条光路光程差的图样。 |
| 3. | The stability of micro - birefringence optical path difference measuring system based on electro - optic modulation method is studied
提出用旋转半波片反射法测量半封闭玻璃制品应力，探讨以电光调制法为基础的微双折射光程差测量系统的稳定性。 |
| 4. | To compensate for low - frequency drift of the optical path - length difference and to keep the operation point on the most sensitive point , the reference mirror is adjusted with a actuator driven by a feedback loop
为了补偿光程差的低频漂移，将工作点稳定在灵敏度最高点，使用一个反馈控制系统驱动微位移器调整参考平面镜。 |
| 5. | The beam - splitter comprises three pairs of fully reflecting planar mirrors and partially reflecting planar mirrors . according to the workspace size and experimental requirement , they were placed with a distance of 195 - cm between two mirrors
空间分光延时系统由三对全反镜和部分反射镜构成，根据实验平台大小和实际需要调整镜片之间的距离，使相邻光束之间的光程差为390cm 。 |
| 6. | It is widely used to measure optical element , optical system , detection of optical surface and the physical quantities ( such as field of temperature , field of density ) related with optical path difference . the underlying measurement principle of psi is to determine the phase of the intensity signal in interferogram received at each pixel of an imaging device
移相干涉术( psi )作为快速、非接触的精密测量手段，已经广泛地应用于光学零件、光学系统、精密表面检测和其它一些与光程差参数相关的物理量的测量(如温度场、密度场等) 。 |
| 7. | However , one of the most serious impediments to wider use and improve precision of psi is its sensitivity to external vibration with the consequence that psi has rarely been used in a manufacturing in - situ and some special situations , such as that the optical path is very long or the detected unit is very large
通过严格控制环境条件(温度、气流、振动等) ，其理论光程差(位相)的最小分辨率可以达到nm的数量级。然而，由于干涉计量测试灵敏度高、精度高，对外界振动非常敏感，使它的应用范围受到限制。 |
| 8. | Mica pearlescent pigments comprising mica particles coated with thin transparent film consisting of highly refractive metal oxides , when the light rays incident into pigment particle , a portion of light is reflected from the exterior of the film and interfere with the other portion of light transmitted through the film to the extremely smooth surface of mica plate where it is reflected again . two portion of light suffers a phase change , viewed by reflected light it exhibit pearly or iridescent optical effects , which depending upon the particle size and the thickness of coatings
云母珠光颜料是通过在云母粉表而镀覆一层高折射率的金属氧化物透明薄膜，如tio _ 2 、 fe _ 2o _ 3等，光线入射后，部分光线被膜层表面反射，其余光线穿过膜层照到云母片再被反射，两组反射光线因光程差发生干涉，形成具有彩虹一样的珍珠光泽，被广泛应用于涂料、油墨、塑料、制革、化妆品等行业，能明显改善产品外观，提高产品档次。 |
| 9. | 3 . the principle of the interleaver based on the interference of polarized light is analyzed theoreticallyand the interleaver architecture of this kind is presented . a 50ghz interleaver is designed and the two series of interleaved spectrum like cosine function is obtained experimentally ; by using the tandem of two birefringent crystals with different optical path difference , we get the flattop spectrum
3 、分析了pbi型interleaver滤波器的基本原理，给出了一种pbi型interleaver滤波器结构；设计了50ghz光学梳状滤波器，实验得到了该器件两组交错分波类余弦输出光谱；采用不同光程差的晶体级联方案，实现了输出光谱平顶化。 |
