It is shown that the resolution of cellphone-based microscopy can be improved with the use of millimeter-scale ball lenses with index n=1.85 placed in contact with fluorescent (FL) objects represented by dye-doped microspheres. Using the virtual imaging through such ball lenses, the resolution improvement from ~35 µm to ~2 µm is achieved over a field-of-view of about 0.1 × 0.1 mm2. Further improvement of resolution and field-of-view can be expected with optimization of parameters of the contact ball lenses that can lead to wide applications of the proposed technology in mobile biomedical imaging.
Improving Cellphone Microscopy Imaging with Contact Ball Lenses
2019-07-01
1873874 byte
Conference paper
Electronic Resource
English