Optical arrangements, for single molecule

Figure 9. (a) Diagram of the hyperbolic electromagnetic trap for levitating microdroplets in a laser beam. (b) Optical arrangement for single-molecule detection in microdroplets lens, L beam splitter, BS polarizer, P trap, T microscope objective, O optical filters, F spatial filter, SF photomultiplier, PMT desiccant chamber, D. (Adopted from [51].)... 

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