• Created by Unknown User (sofroniewn), last modified on Aug 05, 2016

Model labels: RFObjAssby, 14163200 9-25_RFO_chunk

Assembly instructions

1) The polarizing beam splitter (pbs) needs to be glued to the remote focus objective mount using UV optical adhesive (norland 81). The PBS needs to have the three sides marked by arrows facing the beam. The beam needs to be flush with the alignment edges on the mount. The UV transmission of the cube is low, so be sure to expose the glue to UV for ~ 2 minutes or so.
2) Mount the quarter wave plate on a rotation mount on a TR-01 post.
3) Mount the remote focus objective (using 2.5 mm captive screws - Mouser 761-m0277-ss)

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5 Comments

  1. Unknown User (jeromel@alleninstitute.org)

    Is the little blocker for the remote focusing objective glued?

    1. Daniel Flickinger

      It uses double-stick foam tape: McMaster 7626A213.  I believe this should be in the dwfx model, but it may not have made it into a parts list.

  2. Daniel Flickinger

    Note: the 1/4 wv plate in this assembly may contribute a significant wavefront error to the overall system.  This is easily observed if you have a wavefront detector and put it where the remote focus objective should go.  The 1/4 waveplate that is after the Thorlabs multi-stage periscope also can significantly contribute to wavefront error.  We've had luck in ordering one or two extra waveplates, and finding the best ones, and also balancing the wavefront errors between these two waveplates.  The first waveplate can have two different rotations, and the one next to the remote focus objective can have any of four different rotations, all while maintaining maximum throughput.  The best combination of rotations can have a significantly better overall wavefront transmission than the worst.  If you don't have a wavefront detector, then the same problems can be seen in PSFs (high power, a little out of focus).  Either when looking with wavefront sensor or at PSFs, it's easy to see if the waveplates are contributing the worst of the wavefront errors by slightly rotating them, and looking if the aberrations rotate along with them.

  3. Rob Campbell

    Before zapping this thing, can I double check that the orientation is as shown:

    1. Daniel Flickinger

      Looks right to me.