| Summary: | 碩士 === 國立高雄應用科技大學 === 機械與精密工程研究所 === 99 === This study aims to discuss the feasibility of the analysis and suppression of stray light in optical lenses. Suppression of stray light is generally essential to obtain high contract image. We firstly use Visual Basic to create the optical lenses and evaluate the proper positions and sizes of the baffles within the barrels. Then, those data are transferred to the optical software LightTools for further analysis and suppression of the stray light. This study defines PST function is attenuation factor.
In the beginning, simple singlet of which the source of stray light are more easily to be found are investigated. We also study lenses with three and more elements. Optimizing the shapes of mechanical parts, blacking optical lens edges and a barrel, setting baffle system, including threads and searching illuminated and critical objects by LightTools’s ray path function are all considered. At last, we have efficiently distinguished the sources of ghost from the stray light, created suitable shape of sawtooth instead of using baffles, and finally reduced the PST value to about 1/100 for a zoom 8mm movie camera lens.
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