Under astigmatism even narrow parallel light beams will not combine into one point.
有象散存在时甚至很窄的平行光束都不能会聚在一点。
Two kinds of convex lens which make parallel light rays converge to the focal point are given.
本文给出两种能使平行光严格聚焦于一点的凸透镜。
The intensity distribution of parallel light field produced by paraboloid reflector is analysed and its measured result is introduced.
本文从理论上分析了抛物面反射镜产生平行光场的光强分布规律，并介绍了实际测量结果；
The Fourier transform characteristics of off-axis hololens was discussed, which was made by using a dot light source and an inclined parallel light.
利用一点光源和一束倾斜平行光拍摄了一种离轴全息透镜，并对其傅里叶变换特性进行了分析。
The method of pinhole camera which is set up at the cone of a projectile, can record the yaw-time curve directly by a frequency-flash parallel light.
用在弹头上安装针孔照相机的方法，并借助一个频闪平行光源，能够直接记录攻角——时间变化曲线。
The invention relates to a concentrator of a coaxial confocal rotating paraboloidal mirror, belonging to the technical field of parallel light convergence.
本发明是一种同轴共焦旋转抛物面镜聚光器，属于平行光汇聚的技术领域。
In order to decrease the wave aberration, we propose to use the parallel light as reference light, and reconstruct the master hologram by using the inverse light road.
为了把波像差的影响减少至最小，我们建议使用平行光做参考光，并用逆光路再现母全息图。
While not strictly necessary, a parallel light is also applied to the "stereo" layer, this provides additional control over brightness and even can apply colour (mood) effects.
当要求不是很严格时，一组平行光也可以加到“立体”层，这提供了额外的光照控制甚至可以加入颜色(气氛)效果。
The optical system uses the fluorescent lamp with the collimation mirror, incident the grating surface by the parallel light, in order to produce the moiréfringe through the grating.
光学系统采用白光灯加准直镜，以平行光照射光栅面，通过光栅副产生莫尔条纹。
The focal size has been calculated under both ideal parallel light and natural sunlight condition respectively. The result from natural sunlight approximately equal to the measured one.
对平行光和太阳光，分别进行了计算，焦斑尺寸的理论值非常接近实测值。
The focal size has been calculated under both ideal parallel light and natural sunlight condition respectively. The result from natural sunlight approximately equal to the measured one.
对平行光和太阳光，分别进行了计算，焦斑尺寸的理论值非常接近实测值。
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