Optical structure and authentication body

This optical structure has a quantized phase-difference structure on one surface of a quantized phase-difference structure layer, a plurality of quantized projections having a constant size and a plurality of quantized recesses having a constant size being aligned in the quantized phase-difference s...

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Bibliographische Detailangaben
Hauptverfasser: KAGOTANI, Akihito, YASHIKI, Kazuhiro
Format: Patent
Sprache:eng
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Beschreibung
Zusammenfassung:This optical structure has a quantized phase-difference structure on one surface of a quantized phase-difference structure layer, a plurality of quantized projections having a constant size and a plurality of quantized recesses having a constant size being aligned in the quantized phase-difference structure, the optical structure having, in a multiplex diffraction region, the quantized phase-difference structure in which rib-shaped projections in which the quantized projections are arranged in one direction and groove-shaped recesses in which the quantized recesses are arranged parallel to the rib-shaped projections are disposed adjacent to each other in alternating fashion, and a plurality of regularly disposed reproduction points dispersed in one direction being reproduced in the multiplex diffraction region.