Option to use the physical radius of the disk filter

[cmoecke]

The physical radius in [px] for the disk filter should be given by r ≈ ndxNA/lambda, where n is the number of pixels of a (nxn) px^2 image, dx is the pixelsize of the sensor in [m], NA is the numerical aperture of the collector lens and lambda is the wavelength of the light source in [m].