Sample/DOF Target Holder
Requirements:
Place samples on stage with precision, with minimal assembly
Modular - use for both holding samples and holding Depth of Field target
Modular holder is a 3d printed assembly (FDM printer). It is comprised of two parts: a flat plate that screws into the stage (Thorlabs PR01) and a holder that sits on top of the flat plate. The interface is a flat surface (3 degrees of freedom). Pins on one surface sit in grooves on the other, aligning the two pieces. Magnets provide a positive force holding the pieces together.
Earlier versions of the sample holder were bolted directly onto the PR01 stage. Removal was cumbersome and led to alignment errors. In the updated design, switching samples or swapping in the Depth of Field target is as simple as lifting the holder off the plate and dropping another in its place.