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Thibault - owner in transition on LPF

Strange fluorescence with 405nm and polycarbonate UV lenses?

Joined
Jun 16, 2010
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Alright I thought I would ask some of you with or experience with 405nm/polycarb glasses, or others that care to speculate regarding this...

So I just got my hands on a <50mW 405nm pointer.

Also I've had some yellow tinted polycarbonate lenses that came with an Inova X5 UV LED light that I picked up several years ago.

They seem to strip the violet appearance of the 405nm with some unknown number of optical density, lessening the beam to what I would describe as ~5-10mW, and light blue beam on most surfaces.

Also, the fluorescence properties seem to be more profound and tinted different colors.

Examples:
on whites I still get a the same bright blue UV-esque fluorescence
on a yellow notepad I get more of a bright yellowish spot
on a maroon shirt I get an orangish-red kind of color

With the glasses off everything is violet on most surfaces (especially the maroon shirt, although the notepad seems to go to a light pinkish color)

Is it just that these glasses allow the true fluorescent colors (that I might not otherwise notice) to come through without being distorted by the close-to-UV wavelength or is the yellow hue playing tricks on me?
 





the glasses offer uv protection, which violet is. so it is blocking some of the uv light. but since they probably dont have an od rating so surfaces such as white still let the power show. also to get the best flouresence from a 405nm you will need to be wearing the glasses to block the uv light and that way you can still see the flouresence.

michael
 


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