Capillary-Loaded Circular Wafer for Portable Biological Imaging

The patent employs a simple, inexpensive wafer structure with basic optical components (transparent disc, gap, optional cover slip) that can be mass-produced at low cost. The design intentionally avoids expensive, complex optical systems while maintaining sufficient imaging capability for the intended applications, embodying the principle of using simple, disposable-like components rather than complex reusable equipment.

The patent extracts the essential function of sample holding and imaging from complex microscopic systems. By isolating the core requirements (sample carrier, transparent window for imaging, simple gap structure) and removing unnecessary complex components (expensive optics, complex stage mechanisms, automated analysis systems), the design achieves cost-effective imaging suitable for portable devices.

The wafer design incorporates features that enable self-loading of biological samples through capillary action. The gap between the transparent disc and cover slip (or opposing disc) automatically draws in liquid samples without requiring manual manipulation or complex loading mechanisms. This self-service capability maintains operational simplicity while enabling high-throughput processing and scalability.

The patent replaces manual mechanical manipulation of samples with passive capillary action physics. Instead of requiring operators to manually load, position, and manipulate samples using mechanical tools, the design uses the physical phenomenon of capillary wicking to automatically draw samples into the imaging gap, thereby increasing productivity while maintaining ease of operation.