The construction of the support of the 3D aperture (a.k.a. the optical transfer function or OTF) using the Ewald sphere in a brightfield microscope under partially coherent illumination.

#optics #microscopy

How to use the Ewald Sphere to determine the support of the 3D aperture of a brightfield microscope under coherent illumination.

#optics #microscopy

Trying to get a sense of how much current I can pass through salt water and happened to observe electrolysis by accident.

I just added reflective surfaces to my ray tracer project and a concave mirror example. I had to choose a slightly unconventional sign notation to get the paraxial ray trace algos to work, but all the examples match what I calculated by hand.

kmdouglass.github.io/cherry

Here I am computing the spot diagram in realtime for the 0 degree field angle of a f = +50 mm planoconvex lens at all 3 Fraunhofer lines in real time as I step through the image plane in 1 mm increments.

You can easily see the axial chromatic aberration of this lens.