Optiphot: Centering the epi-illuminator
- iconoclastica
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- Joined: Sun Jan 20, 2019 5:43 pm
Optiphot: Centering the epi-illuminator
The field of light descending from my epi-illuminator is not well-centered. I would like to correct this, but the question is: How?
I don't see any obvious screws that would allow to centre it. Here is how it looks like now:
The illuminator does not bear any type designation, only a serial (Nikon 260483). I believe it's identical to this one:
I don't see any obvious screws that would allow to centre it. Here is how it looks like now:
The illuminator does not bear any type designation, only a serial (Nikon 260483). I believe it's identical to this one:
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Re: Optiphot: Centering the epi-illuminator
Hi
In my equipment, same than yours, I had similar problem, and I found that the six radial screws of the tubes of the epi, weren´t well tigth.
I found too that you can adjust puting a shim (or two oposed) between the long cilinder of the epiiluminator and the horizotal arm of the microscope frame.
Best regards
JA
In my equipment, same than yours, I had similar problem, and I found that the six radial screws of the tubes of the epi, weren´t well tigth.
I found too that you can adjust puting a shim (or two oposed) between the long cilinder of the epiiluminator and the horizotal arm of the microscope frame.
Best regards
JA
- iconoclastica
- Posts: 191
- Joined: Sun Jan 20, 2019 5:43 pm
Re: Optiphot: Centering the epi-illuminator
Thanks Jose, but i don't think it is that issue. I cannot make the location move by manhandling the illuminator. I think it is the mirror.
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Re: Optiphot: Centering the epi-illuminator
Is it the lighting that's not centered or is it the field iris? That should have screws to adjust its position.
- iconoclastica
- Posts: 191
- Joined: Sun Jan 20, 2019 5:43 pm
Re: Optiphot: Centering the epi-illuminator
What you see in the photo is the projection of the field iris. The lamp can be adjusted indeed. It does do a lot for the contrast, but nothing to the positioning.
- iconoclastica
- Posts: 191
- Joined: Sun Jan 20, 2019 5:43 pm
SOLVED: Optiphot: Centering the epi-illuminator
The cause was this: in the exit *) of the illuminator sits a black tube that separates the bright field light path from the dark field light path. It has three tiny attachment points which make it vulnerable to breaking, when the illuminator is placed flat on the table top. Mine had come off and I had it replaced by a 3D-printed tube with three projections to centre it and hold it in place by friction. However, I hadn't noticed it could hingle on these projections, wobbling to and fro round a horizontal axis. I would put it straight, but when attaching the illuminator to the microscope, it easily got banged oblique again. That made the light shine off-axis.
*) I don't know how to designate that technically; it's the part pointing down towards the objective...
*) I don't know how to designate that technically; it's the part pointing down towards the objective...
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- Joined: Mon May 16, 2022 3:44 pm
Re: Optiphot: Centering the epi-illuminator
I too have this problem. I've completely dissembled my illuminator, cleaned it, and reassembled it with the offset in exactly the same place. Aaaaaargh!