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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