Psychedelic new forms added
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Psychedelic new forms added
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.
Last edited by Linden.g on Tue Dec 10, 2013 3:52 pm, edited 2 times in total.
Linden Gledhill http://www.flickr.com/photos/13084997@N03/
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great!
my FB page
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.
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.
Psychedelic new forms added
Thanks for the kind comments. The variation of structure is almost endless.
Linden Gledhill http://www.flickr.com/photos/13084997@N03/
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I'm using a BH2-UMA the set-up is here http://www.photomacrography.net/forum/v ... hp?t=22147harisA 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..
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.
Last edited by Linden.g on Wed Dec 25, 2013 9:34 am, edited 1 time in total.
Linden Gledhill http://www.flickr.com/photos/13084997@N03/
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)Linden.g wrote:I'm using a BH2-UMA the set-up is here http://www.photomacrography.net/forum/v ... hp?t=22147harisA 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..
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.
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
Linden
Linden Gledhill http://www.flickr.com/photos/13084997@N03/