PROJECTED FRINGE PROFILOMETRY USING A HOLOGRAPHIC TECHNIQUE: A COMPACT DESIGN FOR ENDOSCOPES

• Main Authors: Chih-Hung Hsiao, 蕭智鴻
• Other Authors: Wei-Hung Su
• Format: Others
• Language: zh-TW
• Published: 2008
• Online Access: http://ndltd.ncl.edu.tw/handle/b8394y

碩士 === 國立中山大學 === 材料科學研究所 === 96 === This paper proposes a miniature gauging system for objects inside a body cavity using the projected fringe profilometry (PSPFP) combined with the endoscope. The fringe pattern is formed by launching a reading bean into a diffraction element . The diffraction element can avoid the influence of projected aberrations by lens and largely reduce the size of projected system. This system has the following properrties: 1. It is a noon-contact, and full field measurement. Only one-shot measurement is needed. It is able to carry on the immediate gauging to the dynamic object. 2. Arrangement of the projected fringe is unique due to the procedure of specific coding. It is easy to revise the errors when undergo phase unwrapping. 3. The double projection scheme compensates the defects of one-shot measurements.