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Everyone can see those cheap security camera IR LEDs glow red? Right?
by nonrandomstring 3y ago
Everyone can see those cheap security camera IR LEDs glow red? Right?
- tines 3y agoYes, but that's more likely to be the LED emitting frequencies outside the range it's supposed to.
- NavinF 3y agoYes and everyone can see 1310nm communication lasers (such as SFP modules) emitting red light when looking directly into one. It's because most IR lasers and LEDs are not really monochromatic. The visible light is very useful for debugging and there's no practical advantage in buying lasers or LEDs emit only one wavelength