Fig. 1. Schematic of lensless imaging technology[27-29]. (a) Shadow lensless microscopic imaging; (b) fluorescence lenslessmicroscopic imaging; (c) transmission digital holography lensless microscopic imaging; (d) reflective digital holography lensless microscopic imaging

Fig. 2. Principle of super-resolution algorithm

Fig. 3. 3D structures of acini analyzed by lensless digital holography microscopic imaging technology. (a) Schematic of the device for the detection of acinar morphology; (b) normal acini; (c) acini lack of polarity

Fig. 4. Application of lensless imaging technology for (a) cardiotoxicity detection; (b) sperm shape analysis[57]

Fig. 5. Application of lensless imaging technology for bacteria detection. (a) Bacteria detection device of lensless digital coaxial holography microscopy based on wetting thin film[59]; (b) whole cell biosensor biochip based on biological luminescence[63]