Research on the inspection of width and tilt angle of rectangle type by using a simple incoherent optical-correlator-system

• Main Authors: Chien chao hsin, 簡朝鑫
• Other Authors: 洪端佑
• Format: Others
• Language: zh-TW
• Published: 2001
• Online Access: http://ndltd.ncl.edu.tw/handle/07567536663084377957

碩士 === 中華大學 === 電機工程學系碩士班 === 89 === Abstract The optical signal process is equipped with abilities of speedly analogy product and parallel process. Therefore, with help of optical signal process, the optical system has the advantage to deal with the real time massive data. The purpose of the thesis research is to improve performance of the existing incoherent object spatial correlator system structure. To complete this system is more facile to friendly operate interface upon windows platform, and more effective to reduce the system cost. This will make incoherent optical correlator more valuable to be extended. In the meantime, the type of moving tested rectangle objects with the simple type of incoherent optical correlator is adopted to obtain the relevant functions of waveform. The test of rectangle testing objects’ width and tilt angle is completed. The hardware of simple system is include simple incoherent object spatial correlator, wide bandwidth amplifier, photon detector, simple digital convert analog card, simple spatial light filter, personal computer and light source. The width of the testing rectangular objects will be up to 0.8mm when the width and tilting angle of the testing rectangular objects are tested with the light sources of bulb light and fluorescent light experimented individually in the laboratory. The microscope-tilting angle of 5 degree will be reached in the analysis of the rectangular objects, when the bulb light is selected for the system in the experiment lab. This outstanding result even surpass some experiments selected by Laser as the light source in the relevant Optical Correlator system because the light absorbed and light transmitted efficiency of simple type of spatial light filter is 0 % and 100% individually. In addition to above reason, also there are more reasons that the simple type of spatial light filter is directly designed into two porous covering instead of single porous covering, and the bulb light is selected as light source to effectively reduce the miscellaneous signal caused by 120 Hz.Timing alternate transformation of power source. Except these, we also proved that the fluorescent light is not suitable in the test of tilting angle of rectangle object. In this thesis the simulation program to relevant functions was proved and compared with the results between the relevant function waveform obtained from the simulation program and the experimented result obtained from simple type of non-relevant optical spatial object constructed by the relevant functions of fundamental theory.