Area Calibration¶

The photometer sensor is not sensible to area, i.e. the value measured corresponds to an integration over the full sensor area. In order to map power distribution over area, we developed a protocol consisting of a running white suqare over a black background.

The background is a square 2 x 2, that can be divided in a lattice such that xstep and ystep are divisors of 2. The white square will go through all the possible positions such that the full 2 x 2 area is filled over the full area calibration run. The square starts at position (-1,-1), being incremented according to its size (-1+xstep,-1+ystep), and so forth. At each (x,y) position, a measurement of power is made.