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Developmental investigation on Maxwellian optics system using personal computer.

使用个人计算机对麦克斯韦光学系统进行开发研究。

基本信息

批准号：
60810005
负责人：
OSAKA Naoyuki
金额：
$ 5.89万
依托单位：
Otemon-Gakuin University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Developmental Scientific Research
财政年份：
1985
资助国家：
日本
起止时间：
1985 至 1986
项目状态：
已结题

项目摘要

The Maxwellian-view optical system for presenting a visual stimulus is an apparatus by which an observer can increase the quality of achromatic/chromatic light reaching the retina of an observer. Problems involved in using the classical Maxwellian optics include difficulty of precise light control, noise from mechanical shutter operation, and manual operation of stimulus pattern change and time course.In the present developmental investigation, these difficulties have been avoided by introducing software program based on personal computer system coupled with digital input/ output controlling interface circuits.(1)Precise light control was performed by introducing feedback-loop-based program control using IF..THEN procedures between luminance meter and personal computer. (2) Wavelength settings and readout can be done by pulse-motor-based precise controller which was connected with personal computer and was under computer controls. The maximum scanning speed for this monochromator scanner is as fast as 17 nm/sec within a wide range of visible spectrum between 380 and 780 nm, thus/only 24 sec is necessary for scanning the visible spectrum. (3) By using personal-computer-controlled noise-free liquid crystal shutter, the duration time can be precisely controllable by digital interfaces of the personal computer. This enabled the experiments such as hue-substitution, brief pulse light presentation, visual evoked potential recording without mechanical shutter noise. A persinal-computer-based optical system could solve these problems with relatively easy and inexpensive using low-cost personal computer.

用于呈现视觉刺激的麦克斯韦视光学系统是一种装置，通过该装置，观察者可以提高到达观察者视网膜的消色光/色光的质量。使用经典的麦克斯韦光学存在的问题包括精确的光控制困难、机械快门操作产生的噪声以及人工操作刺激模式变化和时间过程。在目前的开发研究中，通过引入基于个人计算机系统的软件程序以及数字输入/输出控制接口电路，避免了这些困难。(1)在亮度计与个人计算机之间引入基于IF. THEN程序的反馈回路程序控制，实现精确的光控。(2)波长设置和读出由脉冲马达精密控制器与个人电脑连接，由电脑控制。该单色扫描仪的最大扫描速度为17纳米/秒，在380至780纳米的可见光谱范围内，因此只需24秒即可扫描可见光谱。(3)采用微机控制的无噪音液晶快门，通过微机数字接口精确控制持续时间。这使得在没有机械快门噪声的情况下进行色调替代、短脉冲光呈现、视觉诱发电位记录等实验。一种基于个人计算机的光学系统可以使用低成本的个人计算机相对简单和廉价地解决这些问题。