To: A s l a - UV Light applications
5
Asla wrote:
Hi!
Very interesting, even mesmerizing. Especially how eggs, spider and gems look in different lighting (and filtering). UV has not interested me so that I'd try myself, but I have to say, that it is true joy to look those photos, even taken of "everyday objects"... Thank you!
A s l a
I use the UV lights for a variety of uses that don't require photography, but it's nice to be able to combine the two. UV Light is very useful for checking for repairs with antiques and even fossils since most glues and varnish will fluoresce. UV light is fantastic for detecting oil, coolant and brake fluid leaks. They are also useful for determining whether certain gemstones have been treated or for evidence of synthetic manufacture. Red/pink/violet Sapphires tend to fluoresce due to the Chromium they contain... but blue/green Sapphires will not due to the iron inside them.... which not only gives them the blue/green hue but blocks UV light. (Red Sapphires are of course Rubies as any sapphire that appears pink or red is considered a Ruby...but Sapphire and Ruby are both from the Corumdum family). More recently I'm interested to see what can be done with UV Photography and Insects. The early tests seem quite promising.
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Some of the images below have been posted in a prior thread that I made a few years ago.
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EOS M6 - Corundum (Sapphires/Rubies) under normal light
EOS M6 - Corundum (Sapphires/Rubies) under Ultraviolet light (400nm)
EOS M6 - A Burmese Ruby under Ultraviolet Light (390nm)
EOS M6 - Burmese Ruby under Ultraviolet Laser light (405nm)
EOS M6 - Burmese Ruby under normal white light.
A 405nm Ultraviolet Laser which uses a BluRay diode
PowerShot G1X - Uranium Glass Spheres
EOS M - UV light triggering the phosphor on the dials of a watch being photographed.
EOS M - A bone I found in Tutankhamen's burial chamber in Egypt shows fluorescence where embalming resins presumably affected the outer bone surface. Note the cut marks. The local museum will be viewing this specimen later this year.
EOS M6 - Scorpion photographed last night under UV
EOS M6 - Same scorpion under incandescent lights.
EOS M6 - Baltic Amber Pendant + security-treated Russian Postage Stamps under UV (365nm)
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Regards,
Marco Nero.