In this Letter, we propose a simple and effective approach for transforming a conventional Talbot array illuminator(TAI) with multilevel phase steps into a binary-phase TAI(BP-TAI) through detour phase encoding.The BP...In this Letter, we propose a simple and effective approach for transforming a conventional Talbot array illuminator(TAI) with multilevel phase steps into a binary-phase TAI(BP-TAI) through detour phase encoding.The BP-TAI is a binary(0 π) phase-only diffractive optical element, which can be utilized to generate a large-scale focal spots array with a high compression ratio.As an example, we design a square BP-TAI with the fraction parameter β= 15 for achieving a square multifocal lattice with a high compression ratio β^2.Theoretical analysis and experimental results demonstrate that the detour phase encoding is efficient for designing the BP-TAI, especially with the high compression ratio.Such results may be exploited in practical large-scale optical trapping and X-ray imaging.展开更多
基金supported by the National Natural Science Foundation of China (NSFC) (Nos. 61675093 and 61705096)the Natural Science Foundation of Shandong Province (No. ZR2017MA035)+1 种基金the Shandong Province Higher Educational Science and Technology Program (No. J17KA176)the Taishan Scholars Project of Shandong Province (No. ts2015110055)
文摘In this Letter, we propose a simple and effective approach for transforming a conventional Talbot array illuminator(TAI) with multilevel phase steps into a binary-phase TAI(BP-TAI) through detour phase encoding.The BP-TAI is a binary(0 π) phase-only diffractive optical element, which can be utilized to generate a large-scale focal spots array with a high compression ratio.As an example, we design a square BP-TAI with the fraction parameter β= 15 for achieving a square multifocal lattice with a high compression ratio β^2.Theoretical analysis and experimental results demonstrate that the detour phase encoding is efficient for designing the BP-TAI, especially with the high compression ratio.Such results may be exploited in practical large-scale optical trapping and X-ray imaging.
