Saturday, September 17, 2016

Black-eyed Susan - Rudbeckia hirta in ultraviolet stimulated visible and IR fluorescence photography

Today more studio shots of a flower originating from the USA Prairie, a Black-eyed Susan - Rudbeckia hirta in visible light as well as ultraviolet stimulated visible and infrared fluorescence photography using suitable filters. All shots were done at f5.6. Lens was a UV-Nikkor 105mm quartz fluorite lens. Light source was a high power Nichia 365nm UV LED, background was a dark gray.

[click on image to see a larger one]

Visible light:

UV stimulated visible fluorescence:

UV stimulated IR fluorescence (>680nm):

Triptych of visible light, UV stimulated visible fluorescence, UV stimulated IR fluorescence (left to right):

This flower shows interesting fluorescence including its bullseye pattern, but also some interesting UV stimulated IR fluorescence which reveals otherwise invsible petal structures, and all this gets nicely visible.

I have previously written about that flower HERE
Stay tuned, more will follow on that fascinating subject...

More info on this very interesting field may be found on my site