THREE-DIMENSIONAL DIFFRACTION GRATING AND PATTERN FORMING DEVICE

摘要

PROBLEM TO BE SOLVED: To impart full contrast to the intensity distribution of diffracted light of a three-dimensional diffraction grating. SOLUTION: Scattering bodies on the right side of a face S1 (XZ face) as a boundary are dislocated relatively to the left side. The direction of the dislocation is parallel to X axis and the degree of the dislocation is a/2. When white light is made incident in the direction of -X axis, diffracted light in the direction of +X axis is monochromatic light whose wavelengthλis 2a.