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Simulated diagram of phase mask with outring topological chargel 1 and inner-ring topological chargel 2 : (a) l 1 = 41, l 2 = 33; (b) l 1 = 41, l 2 = 30;
Intensity distribution in the focal plane: (a) Phase mask with out-ring topological charge l 1 = 41 and inner-ring
Generation and application of the vortex beams are part of the hot topics in the optical field.
In connection with the limited detection range of topological charge, we introduce a novel monocyclic multistage intensity distribution, which is generated by the coaxial superposition of two vortex beams with different topological charge numbers which h...
“Detection of the microdots is possible using specially adapted smartphones that can detect the near-infrared fluorescence.
‘Because these phones offer on-board processing power, camera applications, and inexpensive consumer-grade camera modules, we chose to adapt an existing smartphone to enable NIR imaging rather than build a completely new imaging system,” they wrote.
“In addition, we believe that familiarity with the function of these devices will lessen the learning curve for NIR imaging in a field setting.'”
