• Created by Unknown User (sofroniewn), last modified on Aug 02, 2016

Model label: EntranceBeamExpander_4x

Assembly instructions

1) Mount the Thor_ACN254-050-B:1 lens in its lens tubes ensuring that its curved sides will point inwards when assembled.
2) Assemble the cage from thorlab parts including Thor_AC254-200-B-ML mounted lens. Set the lens cage plates approximately 141mm apart.
3) Before mounting on vertical breadboard shine IR laser beam into the beam expander and set the distance between the plates such that the beam is collimated.

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  1. Daniel Flickinger

    Note: This is a 4x expander, which is probably too large for most purposes (if beam is well colimated using the 2x beam expander that comes before the prism pair compressor).  For our 2p-RAM #2, I have changed the -50mm lens to a -75mm lens, making the magnification 2.66.  Since this moved the lenses closer together, I moved the beam expander downstream of its current location, so it no longer straddles the resonant mirror chamber.