Omega 360DF40 on eBay

[Andy Perrin]

Not sure if anyone needs this, but an Omega 360DF40 is for sale right now:

114730573754

 

I actually don't recall ever seeing this particular filter before when Omega Bob was running things.

[dabateman]

That doesn't look like an optical grade filter and by the rolls on the one side of it you can see a fairly high powered lazer was pushed through it. Most likely a clean up filter to make sure your line was correct.

 

I have recently bought 6mm 15-20mm focal length fused silica from that seller though to make UVC capable 3D lenses. They are good and the seller shipped fast.

 

I didn't know about all the really cool microscope parts they were selling. Just missing the floating air table and you could build a nice optical bench with all those parts.

[Andy Perrin]

Ooh yeah the back looks rough. Still, $20 isn’t much. Stick it in a Convoy?

[bvf]

What does the "DF" (as opposed to "BP") signify in the filter description?

[Andy Perrin]

I can’t find an explanation on modern Omega’s site, but my guess is “dichroic filter”.

[dabateman]

No Omega terminology is a little odd.

DC would be dichoic.

DF is Discriminating Filter.

WB is wide band

AF is Alpha filter

Nb is narrow band

QM is QuantaMax surface coated.

 

There are many others.

application-notes-filters.pdf

[bvf]

Thanks, David. Those AF filters look mouth-watering with attenuation > OD10. I would guess they're going to be beyond my pay grade.

[dabateman]

The filters Andy is talking about can be bought new from Omega right now at 12mm size (only half inch) for $100. The price get more expensive from there.

But Omega now, might be better at customizing the filter you need. That seems to be the push of the website after the recent purchase.