衍射角

Based on the principle of grating diffraction, by using television measuring system to measure the offset between the imaging of incident laser and the optical axis to confirm the angle of incidence and the angle of diffraction of the grating, a method of measuring incident laser wavelength in far field with grating is brought up.

依据光栅衍射原理，采用电荷耦合器件CCD作为探测器，通过测量入射激光成像点在电视靶面坐标系中的脱靶量，确定光栅的入射角和衍射角，提出了一种利用固定式平面反射光栅测量远场未知方位入射激光波长的方法。

When the angle radius of the diffraction spot's the first dark ring is big, the effect is relatively small. But when the angle radius is small, especially for turbulent effects being weak, the effect on the beam spreading is very distinct, and the magnitude of the beam spreading is mainly dependent on the jitter item of the scaling relations.

由此定标关系可知，当系统衍射角σ0较大时，跟踪抖动对光束扩展的影响比较小；但是当系统衍射角σ0较小时，特别是在湍流效应较弱的情况下，抖动的影响非常显著，此时光束扩展主要是由系统抖动项所决定的。

An analysis for the intensity of light and diffraction angle of bright fringes of the single -slit Fraunhofer diffraction is developed from qualitative to quantitative discussion,basing on the method of Fresnel s half-band and its extention,and on the obrvation for the amplitute vector features of wave band and sub-band on screen.

由菲涅耳半波带法思路出发，加以延伸扩展，结合观察屏上波带与子波带的振幅矢量图象，对单缝夫琅禾费衍射的明纹光强与明纹衍射角作了由定性到定量的讨论，剖析了半波带法明纹公式的近似性。

However, the diffracted angle and its variation due to SAW gyroscopic effect is very tiny, so the key to the plan is whether such a tiny Bragg diffractive angle can be measured with success.

理论计算表明布拉格衍射角及其变化十分微小，所以能否在实践中成功地检测受Ω调制的布拉格衍射角，关系到SAW陀螺效应声光探测和检测方案的成败。

After introducing SAW gyroscopic effect and acoustooptical Bragg diffraction effect briefly, a measuring tiny angle plan with CCD is put forward. Some core technology to measure tiny angle are discussed.

在扼要说明了Ω调制布拉格衍射角的物理原理后，初步设计了布拉格衍射角的CCD测量系统并讨论了影响其测角精度的若干关键技术。

Ethylene-Propylene copolymers and mixtures with long E-P sequence structures were investigated using WAXD and PLM methods. As the content of Cs reached more than 30 mol %, the (140),(130) crystal planes appear at 2θ= 20 in X-ray diffraction patterns of me-Itcrystallized samples.

用广角X-射线衍射和偏光显微镜方法，研究了具有乙丙长序列乙丙共聚物及其共混物，发现通过熔融慢冷结晶样品，C3含量在30mol％以上，衍射角2θ=20°处出现了属于γ-PP晶型的(140)，(130)晶面衍射。

The diffraction intensity change with to step number L , incidence wavelength λ,diffraction angle θ and outline angle φ 0 is analyzed.

分析计算了衍射光强随台阶数、入射波长、衍射角和轮廓角的变化关系。

The dissertation presents a number of methods and theory involving in diffraction integral, Fourier transform, directly solving differential wave equation, vector analysis, which can be used to study ultrashort pulsed beams propagating in free space, linear dispersive

现将本论文所得主要结论总结如下：基于瑞利—索末菲衍射积分、角谱法和复解析信号法，推导出了等束腰宽度超短脉冲高斯光束在自由空间的严格的传输方程和傅里叶谱，适用于几个光周期甚至一个光周期以下的超短脉冲光束和大衍射角情形，而不产生空间奇异

According to the angular spectrum theory, the Fraunhofer diffraction light intensity distribution

根据衍射角谱理论，利用计算机数值计算了由正三角形和正六边形组成的衍射平面的夫琅和费衍射光强分布，分析并比较了两者的衍射光强分布特点，并用实验验证了上述数值计算的正确性。

According to the angular spectrum theory, the Fraunhofer diffraction light intensity distribution of the equilateral triangle and the equilateral hexagon is calculated by computer, the characteristics of their light intensity distribution is analyzed and contrasted, and it is proved by experiments.

根据衍射角谱理论，利用计算机数值计算了由正三角形和正六边形组成的衍射平面的夫琅和费衍射光强分布，分析并比较了两者的衍射光强分布特点，并用实验验证了上述数值计算的正确性。

Finally, according to market conditions and market products this article paper analyzes the trends in the development of camera technology, and designs a color night vision camera.

最后根据市场情况和市面上产品的情况分析了摄像机技术的发展趋势，并设计了一款彩色夜视摄像机。

Only person height weeds and the fierce looks stone idles were there.

只有半人深的荒草和龇牙咧嘴的神像。