UVF Fossil Shrimp

[Adrian]

This is a visible light/UVF pair of a fossil shrimp: Carpopoenaeus callirostris, from Lebanon (Upper Cretaceous, 99 - 93 myo). The UVF images shows some interesting extra detail such as legs etc.

Technical details:

UVF: Nikon D850, with 105mm micro Nikkor. UVF image: 10 seconds @ f/16, 200 ISO, NEMO torch - light painted.

[colinbm]

Very Interesting Adrian, legs that don't show in visible light are clear in UV 365nm & the opposite is true in UV 365nm, the ones that show in vis are not in UV 365nm light.

[Andy Perrin]

A good candidate for Laser Induced Fluorescence

[bvf]

Have you tried other fossils - is this a typical result? Does this work with all fossils, or does it depend on the rock they're in?

 

What would be the bnefit of laser-induced fluorescence - excitation at a specific wavelength so you can tell what minerals are in the fossil?

[Andy Perrin]

Bernard, please refer to the Laser Induced Fluorescence topic which explains all that, with lots of fossils! The paleontology community has been doing UVIVF for years, and recently started LIF (2015) due to ability to bring out faint structures.

https://www.ultravio...__fromsearch__1

[Adrian]

This was a first time for me with fossils. I am keen to do more, but don't have ready access to specimens!

[ori333]

Looks fantastic. This would be another great application for AR (augmented reality). Too bad the exposure time is 10 seconds. What would need to change for the exposure time to shrink to 0.1 seconds?

[Andy Perrin]

Ori, seems like there is no need for the reality to be augmented with UVIVF! You can see the fluorescence with your eyes directly.

[ori333]

Oh this is fluorescence. Got it. Thank you.