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-   -   Zinnia: UV Induced Visible Fluorescence using Nichia UV LEDs (http://www.openphotographyforums.com/forums/showthread.php?t=16242)

Dr Klaus Schmitt September 14th, 2012 05:52 PM

Zinnia: UV Induced Visible Fluorescence using Nichia UV LEDs
 
Well, some people wonder what could be done with Nichia based flashlights / torches which use the single dice NCSU033A (older) or NCSU033B (newer) chips.

Well, here is my example without much ado...

White Zinnia in visible light:
http://www.pbase.com/kds315/image/146044655/large.jpg

White Zinnia in UV induced visible fluorescence, variant 1:
http://www.pbase.com/kds315/image/146044656/large.jpg

White Zinnia in UV induced visible fluorescence, variant 2:
http://www.pbase.com/kds315/image/146044657/large.jpg

I hope that serves as an example what could be done with those UV flashlights, but of course those are useful for many different applications such as stimulating visible fluorescence, reflected UV photography, forensic, dermatological and dental examinations and photographic recording, curing of UV glue / bonding, as well as leakage detection etc.

... or simply just pretty pictures ;-)

.

Dr Klaus Schmitt September 15th, 2012 02:15 AM

Her comes more, "pretty in pink"

Pink Zinnia in visible light:
http://www.pbase.com/kds315/image/146049540/large.jpg

Pink Zinnia in UV induced visible fluorescence, variant 1:
http://www.pbase.com/kds315/image/146049542/large.jpg

Pink Zinnia in UV induced visible fluorescence, variant 2:
http://www.pbase.com/kds315/image/146049541/large.jpg

Maris Rusis September 15th, 2012 05:23 PM

Brilliant! But please give some technical details; what UV excitation wavelengths, what barrier filters, what chemical species are flourescing, and so on? Years ago I was involved in pioneering aspects of fluorescence microscopy of biological specimens and subject remains truly fascinating.


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