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Is high power IR lamp safe for eyes?
by dogben 2y ago
Is high power IR lamp safe for eyes?
- jpalawaga 2y agoyou mean like the sun?
- nvy 2y agoThe sun is decidedly unsafe for eyes.
- retrac 2y agoThe sun also emits in the visible wavelengths. Your eyes do not feel pain from bright lights due to the heat or similar. It's a response to brightness, in the visible spectrum. Without the visible component, there's no pain. With unhappy optical circumstances it could cook the retina because the pupil is dilated and there's no instinctive response to look away. Not sure how plausible those circumstances are. But I sure wouldn't put a 10 watt IR LED source right up to my eyeball.
- eythian 2y agohttps://arstechnica.com/health/2023/11/bored-ape-creator-says-uv-lights-at-apefest-burned-attendees-eyes-and-skin/ https://arstechnica.com/health/2023/11/bored-ape-creator-say... It can also happen with (the wrong type of) UV lights.
- input_sh 2y agoWhen it's very narrowly concentrated on your eyes for an extend period of time from a short distance, maybe not. When it's beamed widely in your general direction from a larger distance, you'll be fine.
- EarthLaunch 2y agoI looked into that for VR headset eye tracking, which uses IR lights plus cameras to see the eyes inside the dark headset. Here someone did some calculations [0]. > The International Commission on Non-Ionizing Radiation Protection's Guidelines of limits of exposure to broad-band incoherent optical radiation (0.38 to 3 µm)[1] states: > "To avoid thermal injury of the cornea and possible delayed effects on the lens of the eye (cataractogenesis), infrared radiation (780nm < > λ < > 3μm) should be limited to 100 W m⁻² (10 mW cm⁻²) for lengthy exposures (> 1000 s)" 0: https://docs.eyetrackvr.dev/getting_started/led_safety#about-ir-emitter-safety https://docs.eyetrackvr.dev/getting_started/led_safety#about... 1 (pdf): https://docs.eyetrackvr.dev/safety/ICNIRP_optical_radiation.pdf https://docs.eyetrackvr.dev/safety/ICNIRP_optical_radiation....
- dogben 2y agoThanks. So that 30W lamp in another comment might be a safty hazzard if someone in close range stares at it and the beam is tightly focused.
- darkwater 2y agoThe beam is not going to be tightly focused, if it needs to cover a big chunk of a stadium at once
- numpad0 2y agoI guess this device can be modified to take visible red lights with some redesign, if you'll be really concerned with that.
- risenshinetech 2y agoYou're right. While we're at it, we should make sure no one goes up to the massive speaker system and puts their ear right up to the speaker cone too.
- krisoft 2y agoYes. The manual from the manufacturer recommends wearing specific green tinted safety glasses if you are standing closer than a meter to their transmitter while it is on.
- Der_Einzige 2y agoThis has big https://knowyourmeme.com/memes/how-do-i-shot-web https://knowyourmeme.com/memes/how-do-i-shot-web energy
- numpad0 2y ago- IR is just super red light. It's not significantly more dangerous as looking at a lightbulb can be, except human eyes cannot perceive IR and can't contract pupils or stare away by reflexes. - UV is baby step towards X-rays. It's technically super blue light, but it's entering region where lights start splitting chemical bonds and bleaching stuffs like pathogens and human eyes. - LASER is perfectly parallel beams of light. Because it's perfectly parallel and do not diverge, it behaves like sun under magnifying glass at all points in its path, which can be dangerous when the "sun" is high and "glass" focusing it tight. High power IR lamp illuminating audiences from afar is almost safe as any searchlights. IR lasers can be dangerous. UV lamps are not so safe, UV lasers would be bad.
- delfinom 2y agoIR isn't just super red light, it's heat. Lol
- rcxdude 2y agoSo is regular light, in that sense. The IR that's used for this kind of application is 'near infrared', which is much closer to light than the IR emitted by most warm objects.
- erik_seaberg 2y agoIt's light, and some animals can see it, just not us. https://en.wikipedia.org/wiki/Infrared https://en.wikipedia.org/wiki/Infrared has some pictures from the right kind of cameras and telescopes.
- svachalek 2y agoIt is the primary frequency of black body radiation at Earthly temperatures. But it is not the heat itself.
- TeMPOraL 2y ago> LASER is perfectly parallel beams of light. Because it's perfectly parallel and do not diverge, it behaves like sun under magnifying glass at all points in its path To first approximation, in the typical situations regular people deal with lasers. Inverse square rule still applies; laser light does spread out with distance. That nitpick aside, your description is spot on.
- brk 2y agoAt those distances, yes. I’ve gone through the certification process for even higher power units. IIRC you needed direct exposure of several minutes at much less than 1meter from the source to even begin to have risk.
- stubish 2y agoLook at the heating bar on a 1200W electric radiator? That is a lot of infrared, often unshielded to the eyes.