強誘電性液晶シャッターを用いた自動同期回転運動体目視観察装置

抄録

We fabricated a visual observation system for a rotating object with an automatic synchronizing function using a ferroelectric liquid crystal (FLC) cell. Stroboscopic vision was achieved not using a flash light but using a FLC cell as a fast-response optical shutter. A reflective photosensor was used for sensing a rotating object. For the drive of the liquid crystal shutter synchronized with the rotating object, an electric circuit mainly composed of a microcontroller and a H bridge unit, which were made up of easily available electric parts, was designed. The automatic synchronizing function was evaluated from the visibility of a character on the center of the propeller. The results indicate the automatic synchronizing function can work over 6.2 × 10³rpm.