aperture angle

When the formulas are applied , the scale of the observation system due to the large focus aperture angle must be enlarged , or else the empirical formula will be invalid .

在实际应用中，由于聚焦孔径角加大，观测系统范围也必须相应加大，否则经验公式失效。

The effect of some factors on the transmissivity of fiber optic image inverter is analyzed , and the relation of the transmissivity between radial position and aperture angle is given .

用定性和定量的方法，分析影响光纤倒像器透过率的若干因素，给出透过率随径向位置和孔径角的变化关系。提出在制造、应用和测试这种光学元件时应该注意的有关问题。

The main parameters that effect horizontal resolution of migration imaging were identified as medium velocity , dominant frequency of seismic wavelet and aperture angle of migration processing .

结果表明，影响偏移成像水平分辨率的主要参数是介质速度、地震子波主频和偏移处理的孔径角。

The analysis showed that the errors of amplitude mainly depend on aperture angle θ, the other parameters such as frequency f , velocity υ and normal distance z only have limited influence on errors of phase .

分析表明，振幅误差主要取决于孔径角θ，其他参数如频率f、速度υ、法线距离z等只是有限地影响相位误差。

The analysis results show that the best way to enhance resolution of migration imaging is to increase the aperture angle . The resolution was sharply increased when the aperture angle is set between 15 ° and 45 ° .

分析表明，加大孔径角是提高偏移成像分辨率的最有效途径，特别是当孔径角值从15°加大到45°时，分辨率迅速提高；

The influence of aperture angle for illumination light on uniformity of the color splitting system is discussed and a color aberration correction by means of wedge coating with . gradient thickness is proposed , thus the color uniformity can be obviously improved .

讨论了照明光孔径角对分色系统色均匀性的影响，提出了用厚度渐变的楔形膜校正色差的方法，使色均匀性得到显著改进。

At present , this apparatus is used mainly for the examination of the perfectness of convergent spherical wave surface with aperture angle ≤ 1:3 , hence it can be used for the non-contact direct test of aluminized or unaluminized concave mirrors with any aperture .

该仪器现在专用来检验张角≤1：3的会聚球波面的完善性.因此可以用来无接触的直接检验任意口径的镀铝或未镀铝的凹球面镜；

Application of Digital Beam Forming Technology in Synthetic Aperture Radiometer Angle tracking technique for strapdown anti-radiation seeker

DBF技术在综合孔径辐射计中的应用捷联式反辐射导引头角跟踪技术研究

The essence of the fact that wideband signal can not be effectively transmitted using narrowband phased array in scenarios with large aperture and scan angle is given .

以线性调频信号为例，揭示窄带相控阵在大孔径宽扫描角情况下不能有效发射宽带高分辨信号的实质。

A piece of silicon detector vertical to light path is adopted , thus making its photo-sensitive surface nearly overlap with aperture stop and aperture angle of the detector can be enlarged .

采用只与光路垂直的一片硅探测器，使其光敏面与孔径光阑几乎重合，以增大探测器的孔径角。

The Chemical and physical properties of every sample such as IR , Zeta potential , average aperture , the contact angle of powers , the stability of suspended particles and the average size of particles have also been measured .

为考察改性效果测定了样品的红外光谱、粉末接触角、悬浮体的稳定性，粒子平均大小等物化性质。