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derekbeau
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is it possible to read infared ink with human eyes. I have seen lenses for cameras but can't find anything for eyes. If so, where is informaiton on this
thakns
thakns
I've heard of "invisible" inks that fluoresce when illuminated with infrared light. (Similar to UV invisible ink, but on the other side of the visible range.) I assume the flouresence is visible--otherwise what's the point? Do a search on invisible inks.derekbeau said:is it possible to read infared ink with human eyes. I have seen lenses for cameras but can't find anything for eyes. If so, where is informaiton on this
Infrared light is a type of electromagnetic radiation that has a longer wavelength than visible light. It is invisible to the human eye, but can be detected by specialized equipment.
Infrared lenses are designed to focus and manipulate infrared light. They are typically made from materials that are transparent to infrared light, such as germanium or silicon.
Infrared light is used in a variety of applications, including thermal imaging, remote sensing, and communication. It is also used in medical imaging, security systems, and astronomy.
Invisible ink is typically made of a substance that is invisible under normal lighting conditions, but becomes visible under infrared light. Examples of common invisible ink substances include lemon juice, vinegar, and milk.
Infrared light is often used in security measures, such as motion sensors, as it can detect temperature changes and movement that may indicate an intruder. Infrared cameras are also used for surveillance and monitoring purposes.