At last , the principle of defocus measurement with one - way defocused detector is proved correctly . the result compared with conventional differential defocus measurement method shows that the higher measurement sensitivity can be achieved by the method discussed in this paper 最后,本文通过实验验证了单向离焦检测原理的正确性,并通过实验与差动像散检测方法进行了比较,结果表明本文方法具有更高的测量灵敏度。
Digital binoculars are new products and so there are no data about the test of the resolution and field of view matching . in order to measure the resolution of digital binoculars , the method based on the combination of collimator and resolution chart is proposed 为了检验数码望远镜的分辨率,提出了采用平行光管和鉴别率板的组合来测量的方式,并对鉴别率板的离焦量、平行光管焦距与鉴别率板的匹配进行了理论推导。
This paper analyses the critical angle method that often use in focus detected . we receive two relations , the first relation between refractive index of the critical - angle prism and focus - error signal ; the second relation between numerical aperture of object lens and out - of - focus error signal 本文针对伺服系统中常用的调焦方法-临界角方法进行了分析，理论上得到临界角棱镜的折射率、物镜的数值孔径与离焦误差信号的关系。
The experiment results show that there are optimal defocus distance and exposure for the given system and recording material , and to obtain the best snr different reference - to - object beam ratios are also needed for black - white digital images of different space frequencies 实验结果表明，对于给定的系统及记录介质存在一定的最佳离焦量和曝光量，而对于不同空间频率的黑白二值条纹图像还需要采用不同参?物光比以最终获得最佳的信噪比。
Because the using method is differ to the course and essence of blurred image , the results did not satisfied . recently , the image recovery technology is developing in many areas , especially the recovery of blurred image caused by kinds of reasons has been deep researched 对于光学离焦造成的模糊图像的复原，由于使用的方法?图像的增强与锐化(进行高通)与图像模糊的过程与原理存在本质上的不同，虽可以取得一些目视效果，但总的来说效果不够理想。
2 . not only made a details description of distort - image recovery methods including out - of - focus , motion - image and geometrical - transformation , but also realize the recovery function under the environment of visual c + + and matalb . this application is also an innovation in the image processing technology 由于失真的原因多种多样，本论文将详细地介绍离焦、运动这两种主要失真图像的复原方法，并且将利用vc + +语言和matlab语言结合起来实现这一功能。
This paper analyses emphatically the position error and manufacture error of critical - angle prism the position error and aberration of object lens the position error and manufacture error of the polarization beam splitter the position error of the detector , and come out their relations 着重分析了临界角棱镜位置误差与制造误差；物镜的位置误差与像差；偏振分束棱镜的位置误差与制造误差；探测器的位置误差等对离焦误差信号的影响，并给出了理论曲线。
The feasibility and some advantages of employment of sil have been discussed . the numerical aperture are calculated when laser pulse is defocusing . in contrast with traditional microscopy objective , the employment of solid immersion lens can effectively increase the numerical aperture of the recording system ; thereby it can increase the volumetric density and decrease the demand of the incident laser power 当脉冲聚焦点相对于固体浸没透镜底面离焦时，对系统的有效数值孔径进行了计算，结果表明采用固体浸没透镜离焦的方式进行记录，系统的有效数值孔径最低可增大到固体浸没透镜插入前的折射率倍，其数值孔径的理论极限值为存储介质的折射率。
Firstly , in order to meet the requirement in application , the influencing factors for defocus measurement with one - way defocused detector are analyzed and the influencing regularity of detector position are discussed , after that the relationship between defocus errors and output signals is given too . according to the optimization results , the experimental device is established for this paper 首先,本文从工程应用角度出发,通过分析单向离焦检测的误差影响因素,讨论了探测器位置误差对测量的影响规律,给出了离焦量与测量信号的输出关系,优化设计了检测光学系统,搭建了实验装置。
The common path defocusing 4f shearing interferometer in the system was constructed , which is fit for the dense plasma measurement . the advantages of this system consist in its stability and easy adjustment as the common path system and respective adjustability of shearing amount and stripe spatial frequency as m - z interferometer as well 设计了基于共光路结构的离焦4f剪切差分干涉仪，该干涉仪同时具有m - z型干涉仪的剪切量和条纹空间频率分别可调的优点以及共光路结构的稳定性和易于调节的优点，使得在稠密等离子体的测量中，系统参数可以兼顾小的剪切量和大的条纹空间频率。
