Final Design

Optics

Figure 1. Schematic of the Proposed Design

Housing 

Figure 2. Housing using commercially available components

Figure 3. Full assembly of the design with the smartphone, lock, and the reader.

Smartphone Application 

Figure 4. Image of fringe patterns captured by smartphone

Figure 5: Left: Smartphone application home screen. Middle: Image processing in the smartphone application Right: Eye pressure readings

During tests, no noticeable distortions were observed and interference fringes from pressures ranging from 0 mmHg to 60 mmHg were captured accurately. However, the sensitivity of the smartphone camera’s image sensor limited the field of view of the system.