Lichen multispectral in closeup

[Dr Klaus Schmitt]

Since there was a request...

Visible light, reflected UV, simulated bee and butterfly vision (left to right, top to bottom)

 

[Asher Kelman]

Klaus,

The UV reflection SEEMS so uniform, but is this just because you have a wide array of energies in the UV range?

It would be interesting if the UV might be refined with exaggeration of differences in absorption of the UV light or is it uniform a broad UV range of wavelengths?

Also does the reflected light get rotated or polarized?

Asher

 

[Dr Klaus Schmitt]

Asher, from my research the UV reflection using this filter and the way it is white balanced in a standardized way allows to differentiate coursely the "UV sub-bands", so here it gets obvious that this one type of Lichen reflects around 380nm. There is sometimes a polariznig effect, but I haven't checked this sample out yet.

 

[Asher Kelman]

Asher, from my research the UV reflection using this filter and the way it is white balanced in a standardized way allows to differentiate coursely the "UV sub-bands", so here it gets obvious that this one type of Lichen reflects around 380nm. There is sometimes a polariznig effect, but I haven't checked this sample out yet.

It could, perhaps be interesting to look at the inverse, principal UV absorption bands too?

I think it terms of nucleic acid and dividing cells or infection with viruses.


Also, is there any fluorescence?


Asher

 

[Dr Klaus Schmitt]

Well, I would if I wanted to write a paper about such, but too busy with other projects currently ;-)

 

[Asher Kelman]

Well, I would if I wanted to write a paper about such, but too busy with other projects currently ;-)

Funny fellow!

I just wonder since in my chemistry upbringing it always was absorption that we had to answer to, as that how we measured stuff!

Asher

 

[Ted Cousins]

I just wonder since in my chemistry upbringing it always was absorption that we had to answer to, as that [was] how we measured stuff!

Perhaps in Chemistry, absorption is the more interesting metric, based on the higher the amount - the more the effect of UV upon a substance.

Whereas one can imagine that, in photography, the relative amount of UV reaching the sensor is of greater interest ...

Ted

 

[Asher Kelman]

Perhaps in Chemistry, absorption is the more interesting metric, based on the higher the amount - the more the effect of UV upon a substance.

Whereas one can imagine that, in photography, the relative amount of UV reaching the sensor is of greater interest ...

Ted

Thanks so much Ted for your comment!

Value that you are around! What are you shooting with these days?

True, one can get more to easily visualize what’s reflected. But we could compute what’s missing and get complete images with detail we wouldn’t otherwise identify!

I wonder whether some mathematics endowed photographer hasn’t explored this?

Usually when one thinks of something, it’s already been materialized in some form!

Asher

 

[Dr Klaus Schmitt]

Well, we always have to deal with our past... ;-)