Figure 4: Scientific Reports

Figure 4

From: Smartphone-based multi-contrast microscope using color-multiplexed illumination

Figure 4
Figure 4

(a) ZEMAX model of optical arrangement in mobile cLEDscope. The LED array is positioned a certain distance from the specimen plane (SP). The transmitted light is collected by the objective (OBJ) and detected by a smartphone image sensor (S). The built-in lens in front of the image sensor serves as a tube lens. Inset: Magnified view of imaging setup. (b1−d1) Ray trajectories of red and blue light through singlet aspheric, triplet achromatic, and doublet achromatic aspheric lenses, respectively. (b2−d2) Corresponding image field distortion maps.