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Psychedelic new forms added
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Linden.g



Joined: 06 Apr 2009
Posts: 326
Location: PA USA

PostPosted: Sun Dec 08, 2013 7:32 am    Post subject: Psychedelic new forms added Reply with quote

I thought I'd take advantage of the 90 degree lighting capability of the BH2-UMA and explore the interference patterns from oil on water. Its very trippy. Taken with Neo Splan 5x and LED lighting in place of the halogen unit.











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Linden Gledhill http://www.flickr.com/photos/13084997@N03/


Last edited by Linden.g on Tue Dec 10, 2013 3:52 pm; edited 2 times in total
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JH



Joined: 09 Mar 2013
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Location: Vallentuna, Stockholm, Sweden

PostPosted: Sun Dec 08, 2013 10:47 am    Post subject: Reply with quote

Made my day!
Regards J├Ârgen
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carlos.uruguay



Joined: 23 Feb 2012
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PostPosted: Sun Dec 08, 2013 12:05 pm    Post subject: Reply with quote

That enormous beauty!!!
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arturoag75



Joined: 05 Feb 2010
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Location: italy

PostPosted: Sun Dec 08, 2013 12:10 pm    Post subject: Reply with quote

Beautiful wow Wink
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Litonotus



Joined: 20 Jun 2011
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PostPosted: Sun Dec 08, 2013 12:27 pm    Post subject: Reply with quote

great!
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I'm looking for the the extemely rare V-IM magnification changer for the E800 scope. If you have seen a listing or have one for sale please let me know.
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Stefano B



Joined: 07 Aug 2013
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PostPosted: Sun Dec 08, 2013 1:50 pm    Post subject: Reply with quote

beaufiful shots! Very Happy
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Linden.g



Joined: 06 Apr 2009
Posts: 326
Location: PA USA

PostPosted: Sun Dec 08, 2013 5:21 pm    Post subject: Psychedelic new forms added Reply with quote

Thanks for the kind comments. The variation of structure is almost endless.









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Bruce Taylor



Joined: 23 Jun 2011
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Location: Wakefield, Quebec / Ottawa, Ontario

PostPosted: Sun Dec 08, 2013 7:28 pm    Post subject: Reply with quote

Those are incredible! Very Happy
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harisA



Joined: 03 Jul 2011
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Location: Greece

PostPosted: Mon Dec 09, 2013 2:01 am    Post subject: Reply with quote

Impressive images.
Are this taken with epi illumination?
What exactly we see in the images? a mixture of oil and water or something else..
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Marek Mis



Joined: 10 Jul 2010
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PostPosted: Mon Dec 09, 2013 4:36 am    Post subject: Reply with quote

Beautiful and ineteresting images !

Marek
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Linden.g



Joined: 06 Apr 2009
Posts: 326
Location: PA USA

PostPosted: Mon Dec 09, 2013 6:12 am    Post subject: Reply with quote

harisA wrote:
Impressive images.
Are this taken with epi illumination?
What exactly we see in the images? a mixture of oil and water or something else..


I'm using a BH2-UMA the set-up is here http://www.photomacrography.net/forum/viewtopic.php?t=22147
The shapes are due to a very thin layer of hydrophobic liquid residue left behind from evaporated gasoline on the surface of water. The colors are due to the interference caused by white light bouncing off the top and bottom boundary interfaces. Oil/air and oil/water. As the more volatile solvents evaporate the oil layer gets thinner and this shifts the colors seen. Surface tension, curved edges and particles all impact the thickness of different parts of the floating droplets which all adds to the complexity. This is a similar effect as seen in soap films.
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Last edited by Linden.g on Wed Dec 25, 2013 9:34 am; edited 1 time in total
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harisA



Joined: 03 Jul 2011
Posts: 442
Location: Greece

PostPosted: Mon Dec 09, 2013 6:34 am    Post subject: Reply with quote

Linden.g wrote:
harisA wrote:
Impressive images.
Are this taken with epi illumination?
What exactly we see in the images? a mixture of oil and water or something else..


I'm using a BH2-UMA the set-up is here http://www.photomacrography.net/forum/viewtopic.php?t=22147
The shapes are due to a very thin layer of hydrophilic liquid residue left behind from evaporated gasoline on the surface of water. The colors are due to the interference caused by white light bouncing off the top and bottom boundary interfaces. Oil/air and oil/water. As the more volatile solvents evaporate the oil layer gets thinner and this shifts the colors seen. Surface tension, curved edges and particles all impact the thickness of different parts of the floating droplets which all adds to the complexity. This is a similar effect as seen in soap films.


Thank you Linden althought there is one final issue puzzling me.These colour effects are due to light from above (epi illumination)or you illuminate your specimen with the aid of an external light source(as seen in your setup photo)
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Jacek



Joined: 02 Oct 2011
Posts: 4712
Location: Poland

PostPosted: Mon Dec 09, 2013 8:11 am    Post subject: Reply with quote

wow, super !
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Linden.g



Joined: 06 Apr 2009
Posts: 326
Location: PA USA

PostPosted: Mon Dec 09, 2013 10:32 am    Post subject: Reply with quote

Sorry for the confusion, I'm using the side lighting only when I need to balance the flat epi light but in the case of the oil it's not used. I'm using the direct epi (bright field) without the analyses polarizer.

Linden
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harisA



Joined: 03 Jul 2011
Posts: 442
Location: Greece

PostPosted: Mon Dec 09, 2013 1:33 pm    Post subject: Reply with quote

Thank you Linden.
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