We describe the interference fringes produced when periodic and aperiodic (random) amplitude masks are illuminated with partially coherent light. Periodic transmission gratings and the recordings of laser speckle patterns have been used to constitute the masks. We will discuss applications to measure the motion of objects and in particular study the rotational motion measurement using random masks.
|Number of pages||8|
|Journal||Proceedings of SPIE - The International Society for Optical Engineering|
|Issue number||pt 2|
|Publication status||Published - 1990|
|Event||Optical Testing and Metrology III: Recent Advances in Industrial Optical Inspection - San Diego, CA, USA|
Duration: 1990 Jul 8 → 1990 Jul 13