visualizing UV patterns

[PBTheThird]

I am not sure if Ni is the place I should be. I basically ran across it randomly. I am an emeritus professor. Just before I retired I ran an experiment which allowed me to determine what trait or combination of traits made caterpillars more susceptible to be parasitized by other insects (AKA parasitoids). The most powerful predictor of susceptibility was being green. This of course seemed, at first consideration, to be counterintuitive. That is, one would think that a green caterpillar would not be easily visible against a green leaf. My ultimate hypothsis was that perhaps caterpillars and leaves rflected differentially in UV; understanding that parasitoids can see in UV. Unfortunately, I have not been able to find away to captures images of caterpillars on leaves since most cameras are designed to block UV. So, I am wondering whether anything is available here to do what I hope to accomplish. Thank you.

[Hatef.fouladi]

there is some ccd that are create imaging in UV wavelength you have to use them
I know some of them
see these links
http://www.graftek.com/pages/sonyuv.htm
http://www.jai.com/en/products/ultraviolet
https://www.pco.de/special-cameras/pcoultraviolet/

[MikeeB]

Leaves are highly visible in the IR spectrum. I have played about with an IR pass filter for my DSLR and can get some amazing shots of trees, grass etc. Have a look at this article on taking IR images, all of the examples are green tree based.

http://www.amateurphotographer.co.uk/technique/camera_skills/how-to-shoot-infrared-photos-3934

At these kind of wavelengths you are mainly looking at reflectance and not heat signatures, so it is not quite what you would normally think.

IR is also a lot easier to deal with as many cameras will work in this range,

Mike

[Hatef.fouladi]

Dear MikeeB,
what you are told is not true and not what OP want
IR spectrum is above visual spectrum start almost from 750nm and go up to radio wave area what you indicate as IR is near IR indeed that carry temperature and can create bad effect on normal ccd so there are always some filter front of ccd to filter them
but UV is under visual wavelength start almost form 400 nm down to x ray area
normal ccd could not understand this spectrum also our eyes could not too
but some animals could see some part of uv spectrum and use it for analyse environment . as an nice example when in some species when female animals are ready for sexual intercourse they radiate UV spectrum and male animal could see this spectrum and know about it

[PBTheThird]

Any other thoughts out there. This is a tough one but I do appreciate thoughts, guidance, and sources of infomation on the subject. Thanks.

                                                                                                                                         The emeritus professor

[alexderjuengere]

this website looks quite interesting: http://www.naturfotograf.com/UV_IR_rev01UV.html#top_page

also the english wikipedia article does look promising https://en.wikipedia.org/wiki/Ultraviolet_photography

[Hatef.fouladi]

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