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Fig. 7 | Journal of the European Optical Society-Rapid Publications

Fig. 7

From: Ring-shaped bifocal lens used for fluorescent self-referenced holographic imaging

Fig. 7

As the RBL is a bifocal lens, it is a dual-imaging system. It creates double images of one target at different planes. (These planes are also captured.) The first image is produced by the cone-shaped beam, which is surrounded by the defocused image of the hollow beam. On the other hand, the second image can be reproduced from the hollow beam, while the defocused cone shaped beam overlaps with it. Here the two image planes and the hologram plane can be seen with the intensity patterns generated with the RBL based Self-referenced Holographic System (SHS), where the target is the sign “®”. One can see, that the first image (a) is surrounded by the hollow beam. Vice versa, the second image (b) overlaps with the defocused cone beam. c is the intensity distribution of the a and b images along the red line, and d is the hologram of the same target

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