Final Design

    The project's goal was to design a test system that allows Dr. Virre to obtain signals around the eye using active electrodes and optodes. In order to accomplish the task, two mask were fabricated: electrode and optode mask. The electode mask has 6 mount holes for 6 electrodes in each eye. The optode mask has 2 holes for the optode emitter and receiver pair in each eye. The masks are held together by an elastic nose bridge band and a scuba head band. Both mask uses the same mounting hardware that allow the sensors to swivel side to side, back and forth, and move axially towards the skin. The mounting hardware consists of a shaft, ball, and mount. The mount is press fitted onto the mask, the sensors are placed into the shaft, the shaft is fitted into the ball, and the ball goes into the mount. 

    Mask:

Figure 1: 3D Masks

        The mask are inspired by Iron Man's headgear. These masks are 3D printed using ABS filament and held together by an elastic nose bridge band and a scuba head band.

    Sensor Mounts:

Figure 2: Optode Mounting Hardware

Figure 3: Electrode Mounting Hardware

        The mounting hardware consists of 3 parts: shaft, ball, and mount. The shaft and ball are 3D printed using a flexible filament. The mount is 3D printed using PLA filament. The shaft allows axial movements and the ball with the mount allows swivel movements.

    Final Products:

Figure 4: CAD of Optode Mask

Figure 5: Final Electrode Mask

Figure 6: Final Optode Mask

Figure 7: Dr. Viirre with Optode Mask

Performance Result:

    Test on the optode mask was possible with the help of Dr. Poizner and his team. Using their equipment, the first test was to see if the optodes had good skin contact. The mounting system allowed optodes to be fully adjusted and it provided excellent skin contact for the rest of the test. The involved Dr. Viirre moving his eyes left and right for a period of time. The test provided insight on Dr. Viirre's theory of using Opto-Oculogram to record the eyes. The graph below shows the results of the optode test.