Colour and Stereo Surface Imaging System - CaSSIS

CaSSIS

Dataset Analysis

Antoine has done a quick analysis of a dataset we got on Friday with the focal plane roughly in place. He used a 2D Gaussian to ...

... fit the point spread function as we did a through focus test. Although the focal plane is not yet fixed, it should show us what is possible with the system when everything is bolted down. You can see here that the system has astigmatism (the x and the y best foci are in different positions of the focal plane - as expected) and a nice round PSF is expected where the two curves cross. That's our target. The full width half maximum will then be <=1.3 px. Why