Question about UM/FMPLF and BD-type objectives in R-DIC/DF

[erikwetterskog]

Hello,

Trying to figure out what objectives I should get for an Oly reflected DIC/DF setup with U-RLA.

I have been offered both UMPLFL BD (10x-20x) objectives as well as an LMPLFN 10x objective for reasonable prices. Any of these objectives will work with U-DICR. I’m also interested in playing around with DF in the episcopic regime.

I realized that the BD-objectives require a special nosepiece, which is not that common. What is the advantages of BD-objectives. Is it possible to use the non/BD LMPLF in darkfield? I understand that I need the U-RLA illuminator which supports darkfield. I also see that the UM/Bd objectives have slightly higher NA and shorter WD than the LM-objectives.

Does anyone have documentation on this system?

Thanks in advance!

[Scarodactyl]

You could sort of do darkfield without a bd objective by applying a ring light to the end of the objective, but that is involved and will likely affect working distance at least. Darkfield is nice but DIC can give a similar effect if tuned right.