AND, APERTURE, BLACK, BW, BY, DIFFRACT, DIFFRACTION, EFFECT, FRESNEL, GRAM, LIGHT, MONOCHROMATIC, NEAR-FIELD, OMIKRON, OPTICAL, OPTICS, PATTERN, PHOTONICS, PHYSICS, PRODUCED, RADIATION, SCIENCE, SCIENTIFIC, SHADOW, SHADOWGRAM, SHADOWGRAPH, STAR, W, WASHER, WHITE,