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主观式波前像差仪
相关语句
  subjective wave-front aberrometer
     The paper introduces the working principle of a new subjective wave-front aberrometer and describes the control system of optical path、automatic tracing system of the pupil and computer program control system in a detailed way.
     本文详细介绍了一种新型主观式波前像差仪的工作原理,具体地阐述了主观式波前像差仪的光路控制系统、瞳孔自动跟踪系统以及计算机软件控制系统,并给出了像差仪的结构原理图以及程序控制流程图。
短句来源
  相似匹配句对
     Mathematical Expression of the Human Eye's Aberration and the Designing and Application of Subjective Wave-front Aberrometer
     人眼像差的数学表示及主观波前像差测量的设计与应用
短句来源
     A Study and Implementation of Image Processing and Auto-tracing in Subjective Wave-front Aberrometer
     主观人眼波前像差中图像处理与自动跟踪的研究和实现
短句来源
     According to the geometry of slope measurements for the subjective wavefront optometer, a wavefont reconstruction model using zernike polynomial with normalization factor is put forward.
     针对主观像差波前斜率采样方案,提出了采用带标准化因子的Zernike多项对眼测试波前进行重建的数学模型;
短句来源
     Accuracy of Zywave aberrometer in measurement of refractive errors
     Zywave波前像差测量屈光不正的准确性研究
短句来源
     The Pump Ebulliometer
     泵沸点
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A new subjective wave-front aberrometer, which measures ocular wave-front aberrations, is studied. The working principle and design project are presented. The method of three optical channels is used to design the optical system. The key technologies of multi-threading, video collecting, image processing and the control of single-chip microcontroller and stepping motors are used to realize three-dimensional real time automatic tracking of pupil. All the seven order ocular aberrations are measured with the aberrometer....

A new subjective wave-front aberrometer, which measures ocular wave-front aberrations, is studied. The working principle and design project are presented. The method of three optical channels is used to design the optical system. The key technologies of multi-threading, video collecting, image processing and the control of single-chip microcontroller and stepping motors are used to realize three-dimensional real time automatic tracking of pupil. All the seven order ocular aberrations are measured with the aberrometer. The ocular aberrations are described with Zernike polynomials, two-dimensional and three-dimensional wave-front aberration maps. The formula of every order wave-front aberrations' RMS is obtained. 110 eyes of 57 patients were measured three times for clinic investigation. The difference between the gradually descending values of every wave-front aberrations' RMS was not significant (P >0.05) with SPSS software. The results show that the repeatability and accuracy of the aberrometer are good.

研究了一种用于测量人眼波前像差的新型主观式波前像差仪,给出了工作原理和实现方案。采用先进的三光路设计方法实现光学系统的设计,采用多线程、视频捕捉、图像处理、单片机及步进电机的控制等关键技术,实现了瞳孔的三维实时自动跟踪。该像差仪能测量出人眼的全部七阶像差,采用Zernike多项式、两维和三维波前像差图对人眼像差进行了描述,给出了计算各项波前像差的均方根(RMS)的公式。通过对57人(110只眼)的进行三次临床测量,采用SPSS统计软件对测量得到的各阶波前像差的RMS逐级递减值进行两两比较,无差异性(P>0.05),结果表明该像差仪测量的重复性好,准确性高.

The paper introduces the working principle of a new subjective wave-front aberrometer and describes the control system of optical path、automatic tracing system of the pupil and computer program control system in a detailed way. The Schematic diagram of the aberrometer and the flow charts of program are illustrated. Two methods of wave-front aberration expressions, namely the Zernike polynomials and wave-front aberration maps,are also introduced. The aberrometer can measure lower-order and higher-order aberrations...

The paper introduces the working principle of a new subjective wave-front aberrometer and describes the control system of optical path、automatic tracing system of the pupil and computer program control system in a detailed way. The Schematic diagram of the aberrometer and the flow charts of program are illustrated. Two methods of wave-front aberration expressions, namely the Zernike polynomials and wave-front aberration maps,are also introduced. The aberrometer can measure lower-order and higher-order aberrations accurately. It will be widely used in the future.

本文详细介绍了一种新型主观式波前像差仪的工作原理,具体地阐述了主观式波前像差仪的光路控制系统、瞳孔自动跟踪系统以及计算机软件控制系统,并给出了像差仪的结构原理图以及程序控制流程图。同时介绍了主观式波前像差仪中用于定量描述波前像差的两种方法:Zernike多项式和波前像差图。主观式波前像差仪能精确地测量出人眼的低阶和高阶像差,其应用前景广阔。

The correction of human eye's aberration is one of the researching focuses in ophthalmology.It is of great importance to improve the visual performance of human eyes.The measurement of human eye's aberration is the foundation of the correction surgery.The paper studies the working principle of a subjective wave-front aberrometer and the key techniques of image sampling,image processing and analyzing,image segmentation with Ostu method and auto-tracing function.The self-produced aberrometer which used above key...

The correction of human eye's aberration is one of the researching focuses in ophthalmology.It is of great importance to improve the visual performance of human eyes.The measurement of human eye's aberration is the foundation of the correction surgery.The paper studies the working principle of a subjective wave-front aberrometer and the key techniques of image sampling,image processing and analyzing,image segmentation with Ostu method and auto-tracing function.The self-produced aberrometer which used above key techniques can measure lower-order and higher-order aberrations accurately.The measure results can reach up to seventh order with 35 items.It will be widely used in the future.

人眼像差的矫正是目前眼科界的研究热点之一,对于提高人眼视觉质量具有十分重要的意义,人眼像差的测量是像差矫正的基础。本文研究了主观式波前像差测量仪的测量原理,并对其中的图像采集、图像处理、图像的Ostu法阈值分割,自动跟踪等关键技术进行了研究。采用本文研究的关键技术自行研制出的主观式波前像差仪能精确地测量出人眼的低阶和高阶像差,测量结果可达7阶35项,其应用前景广阔。

 
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