Fig. 5.

Device sensitivity comparison. The sensitivity of new (blue) and previous (orange) devices was measured. (a) Pixels with black absorption filter (PWF, triangle points) and without filter (POF, square points) of each device were graphed separately. (b) These were then subtracted to get a cleaner signal, and the $x$ axis range was shortened to highlight low light situation. The new device showed higher pixel output value and steeper slope than the previous device. Frame time was 11.82 ms to get base sensitivity.