Accidental DIC

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Johann
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Accidental DIC

#1 Post by Johann » Thu Jun 09, 2016 6:11 pm

Have anyone seen this before?
I got a very nice DIC effect from my stock standard brightfield setup.
The DIC effect was created when i took the picture using my cellphone through they eyepiece, the alignment was just a little offset as can be seen by the bottom shadow.
But the effect is amazing.
No stacking, just one image.
The effect was only visible from the cellphone camera - not directly on the microscope.
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Oliver
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Re: Accidental DIC

#2 Post by Oliver » Thu Jun 09, 2016 6:18 pm

DIC similar effects can be done by "oblique illumination", in which a filter is placed into the filter holder to illuminate the specimen from the side. The misaligned camera might have done a similar thing, picking up more light from one side. The shadows on the specimen seem to indicate this, and they produce a 3D like effect.
Oliver
Image Oliver Kim - http://www.microbehunter.com - Microscopes: Olympus CH40 - Olympus CH-A - Breukhoven BMS student microscope - Euromex stereo - uSCOPE MXII

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rnabholz
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Re: Accidental DIC

#3 Post by rnabholz » Thu Jun 09, 2016 7:05 pm

Hi Johann,

As Oliver indicated, you are seeing the effects of oblique Illumination, a great technique.

Another form of oblique that produces some interesting effects was developed by a man named van Egmond. using a simple mask, he could create a very DIC - like result.

If you search the forums for "van Egmond" you should be able to turn up a number of posts that I and others made using the technique.

Here is a link to one that I did to demonstrate the potential of the technique:

viewtopic.php?f=28&t=2686&hilit=Van+egmond

Give it a try, out is great fun.

Rod

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gekko
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Re: Accidental DIC

#4 Post by gekko » Thu Jun 09, 2016 10:31 pm

Yes. Very nice.

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Johann
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Re: Accidental DIC

#5 Post by Johann » Fri Jun 10, 2016 8:26 am

Thanks for the info guys,
and thanks for those PDF files Rod, Definitely going to print them and try it out :):)
Omax M837ZL
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