Diffractive optical device based on staggered arrangement, structured light projector and design method

• Main Authors: FAN ZHENTAO, TIAN KEHAN, SUI LEI
• Format: Patent
• Language: Chinese; English
• Published: 09.04.2024
• Subjects: OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS; OPTICS; PHYSICS

The invention provides a diffractive optical device based on staggered arrangement, which comprises a plurality of optical structures, the plurality of optical structures correspond to a plurality of same minimum rectangular units, the arrangement mode of the minimum rectangular units is transverse or longitudinal periodic staggered arrangement, the staggered distance is 1/n transverse period or 1/n longitudinal period, and n is a positive integer greater than 1; the phase distribution of the plurality of optical structures is formed by arranging a second phase structure array to form a plurality of identical minimum rectangular units which are arranged in a staggered manner; wherein the second phase structure is obtained by orthogonal transformation of the first phase structure, and the first phase structure is obtained by performing level coordinate non-orthogonal transformation on a first light splitting dot matrix which is arranged in a staggered manner to obtain a second light splitting dot matrix which