My recent acquisition of a Lumintop Tool 365nm UV light has aroused my curiosity. I'm much more likely to EDC it than my S2+ 365nm UV light.

The Clear Welding Magnifier Lens | Small 2 x 4.25 is a high-quality magnifier lens for welding made of clear plastic. This Phillips Safety lens is durable and designed to offer an augmented image with great visibility. These Clear Welding Magnifier lenses have a small rectangular shape with dimensions of 2” H x 4.25” W. In addition, they are available in eight different magnifications: 0.75, 1.00, 1.25, 1.50, 1.75, 2.00, 2.25, and 2.50.

Actually, similar to the fluorescent leak detection fluid, I suspect you can detect anything if you have a suitable florescent dye that will stick to the ‘thing’ you’re trying to detect, and not to the surroundings.

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I remembered another “use” for UV- Professional “hand washing training” kits exist, where the “germs” are some kind of fluorescent dye applied to your hands. You wash your hands as normal, and the UV light will show where you missed.

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UV light does nothing with blood. Cop tv series sometimes suggest otherwise, but that’s tv for you… The neat thing about 365nm (and shorter wave lengths) is that it’s practically invisible so you don’t cast a purple light on the inspected objects.

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Polarized light can be produced by transmission through polarizers or by reflection from the surface of transparent material such as glass or water. Fig. 4 ...

As a general guideline, focal lengths below 35mm are considered wide-angle, around 50mm is a standard lens, and above 75mm is telephoto. Changing the focal ...

A relay lens system is used to convey the image of the object to the eye or, in some cases, to camera and video sensors. A basic compound microscope could ...

I have 2 365nm lights. The famous classic Nichia i have in a Singfire SF-348 (1× AAA) and a more powerful one (can’t remember the brand) in a black Romisen RC-A6 (2×AAA) which i only built recently. Both with black lenses (ZWBA?) of course. The benefits of these lights is that they have boost drivers, so no problems with Li-ion batteries running too low.

Oh, you can cure UV curing glues and paints with them too, but that also works (sometimes better) with 395nm. But UV blocking glasses are recommended. Not sure about the damage 365nm can do to human retinas, but it doesn’t feel pleasant to the eye.

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