OPTICAL DELAY, INTERFERING SYSTEM USING THE SAME AND DETECTING SYSTEM USING THE SAME

摘要

PURPOSE: A delay element, a interference system using the same and a measuring system are provided to generate multi-wavelength light of moire fringe shape, and to be changed efficiently according to the physical quantity sanctioning the moire fringe interval. CONSTITUTION: The input part is input with the light from outside. The delay part delays the input light by corresponding to the physical quantity applied from outside. The delay element includes the output part for outputting the delayed light to outside.