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随衍射角
BragGrate (or BG) is a trademark of OptiGrate for volume Bragg gratings (VBG) produced by a refractive index modulation in the volume of a photosensitive BragGlass. Depending on the diffraction angle and orientation of a grating in the plate, one can distinguish several types of VBG diffractive optical elements.
When measuring samples which have curved surfaces, such as pharmaceutical tablets and ball bearings, various effects are seen due to the curvature, such as shifting of the diffraction angle and widening of the full width at half maximum.
If the propagation distance is smaller than the diffraction-free range, temporal pulse forms and normalized power spectra remain unchanged as the diffraction angle increase...
传输距离大于无衍射长度时,随衍射角增加,光谱由蓝移变为红移,脉冲展宽。
In a phase grating, operating in transmission, multiple grating periods can be superimposed yielding additional possibilities to vary the diffraction angle distribution of the pump light exiting the phase general, the process of generating a specific phase grating to be irradiated by the pump light in order to obtain a desired angular distribution for the deflected pump light beam is similar to a process of generating a hologram and irradi-ating the same by a reference light beam.
If the propagation distance is smaller than the diffraction-free range, temporal pulse forms and normalized power spectra remain unchanged as the diffraction angle increases.
传输距离小于无衍射长度时,随衍射角增加,功率谱形状未变,脉冲波形保持不变;
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The basis is that when incident polarized light gets through a liquid-crystal box, it's first diffraction angle and optical intensity are controlled by periodic electric field.
入射偏振光通过空间周期电场作用下的液晶盒,一级衍射角和衍射光强受到电压的调制。
The only software in market which can design wide-angle DOE with total diffraction angle up to 120 degree.
市场上唯一可设计大角度DOE 的光学软件,衍射角度可达到120º
In a preferred embodiment of a light source unit accord-ing to the invention, the deflecting unit is designed as a variable diffraction grating for decomposing the ini-tial pump light beam into partial pump light beams de-flected according to different diffraction orders. The partial pump light beams exit the grating at a respective diffraction angle each, the corresponding angular distribution being dependent on the grating structure. Here, the variation of the angular distribution of the de-flected pump light can, for example, be performed by me-chanically exchanging the grating in a revolver.
The polymer structure was investigated by using FTIR, X-ray diffraction, electron diffraction and contact angle measurements.
通过热失重,红外光谱、X-射线衍射、电子衍射和接触角测定等,研究聚合物结构与性能。
There is no crystalline diffraction of wide-Angle X-ray to be discovered in PES, but there is birefringence effect both in its bulk and solution.
聚芳醚矾(PES)无广角X-射线的结晶衍射,但其本体及溶液均具有解偏振效应。
Setting the incoming beam angle to the Bragg angle increases or maximizes the diffraction efficiency, which is the ratio of first order beam power to input beam power.
The penetration depth, and thus the diffraction efficiency, can then be tuned by applying a voltage between the electrode 11 and the uniform liquid layer 14 that will cause a change in the effective contact angle due to electrowetting.
The Brownian motion results from impacts of the thermal movement of the molecules of the suspending fluid on the particles. The intensity in the diffraction pattern observed under a scattering angle Q fluctuates with time t.
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