Face ID Visible IR Light?

Discussion in 'iPhone' started by stupendusboi, Nov 6, 2017.

  1. stupendusboi macrumors member

    Joined:
    Sep 8, 2007
    #1
    I was just unlocking my X in the dark using Face ID and saw two red flashes of light on both sides of the earpiece. Are these the IR lights used for Face ID? I thought infrared was invisible to humans?
     
  2. alecgold macrumors 65816

    alecgold

    Joined:
    Oct 11, 2007
    Location:
    NLD
    #2
    It should invisible and if there is any visibility it would be blinded by the brightness of the screen. Also afaik there is only one IR beam, not two?!
     
  3. Cergman macrumors 6502a

    Cergman

    Joined:
    Jan 1, 2013
    Location:
    my tesla
    #3
    I see what you are referring to as well. When FaceID unlocks in pure darkness, you can see a dot on either side of the notch blinking a faint burgundy color.
     
  4. 5pctoff macrumors newbie

    Joined:
    Oct 31, 2017
    #4
    Yep, I've seen the red light coming from the left side when I use my phone in bed. I'm not 100% sure if I've seen it coming from the dot projector on the right side, but possible :)
     
  5. TechNismo macrumors 6502

    TechNismo

    Joined:
    Oct 22, 2017
    Location:
    6ix
    #5
    Don't worry. We are all on the same boat! Experienced it twice so far.
     
  6. WolfSnap macrumors 6502a

    WolfSnap

    Joined:
    Sep 18, 2012
    Location:
    SoCal
    #6
    In really dark locations, Apple says you may be able to see the red light. It's faint and hard to see, but, you can see it. It's normal, and expected.
     
  7. C DM, Nov 6, 2017
    Last edited: Nov 7, 2017

    C DM macrumors Sandy Bridge

    Joined:
    Oct 17, 2011
    #7
    The same kind of thing applied and really still applies to the proximity sensor as I recall, where some people have been able to see it sometimes in darkness.

    Safety section at https://support.apple.com/en-us/HT208108 also talks about this.
     
  8. caoimhin macrumors member

    caoimhin

    Joined:
    May 11, 2006
    Location:
    Dublin
    #8
    So, when I look at the dot projector and flood illuminator through a camera (through which IR aid captured and displayed as visible light), I notice that the flood illuminator blinks constantly. Even when attention awareness is switched off.

    Try it yourself—look at the notch using another phone’s camera, or the view screen of a point and shoot.

    Any idea what it’s doing? Any significant effect on battery?
     

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7 November 6, 2017