High Resolution Imaging

Goal

We would like to be able resolve individual atoms in a 760nm square lattice.
Lattice.jpg

Approach

The diffraction limit tells us that we cannot have two point sources closer than $\frac{\lambda}{2NA}$ and hope to resolve them. Therefore, in order to get the best resolution possible, we are trying to make $\lambda$ as small as possible by collecting photons from the 405nm transition in 40K, and making the numerical aperture, $NA$, as large as possible by getting very close to the atoms:

Microscope.png

Progress

Microscopes

High Resolution objectives:
Nikon CFI S Plan Fluor ELWD 60x/0.75
Zeiss LD-Plan NeoFluar 63x/0.75
NIkon CFI Plan Apo 40X/0.95

Magnifying objective:
4x DIN Semi-Plan Intl Std Objective
Magnifying objective setup

Tube Lens Positioning
Zeiss microscopes
Nikon microscopes

Windows

Meller optics windows

Images

Nikon CFI S Plan Fluor ELWD 60x/0.75 images
Zeiss LD-Plan NeoFluar 63x/0.75 images
NIkon CFI Plan Apo 40X/0.95 images

Quantifying the resolution

MTF and CTF
Resolution testing setup
CTFs:

Diffraction limited resolution?

References

40K 405nm transition
resolution

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