Wearing a mask?
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...
https://iopscience.iop.org/article/10.1143/JJAP.41.524/pdf">https://iopscience.iop.org/article/1...
“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.& #39;”
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