Step 2: Now Try Using the Front-Facing FaceTime Camera to See Light from an Infrared LED

Now press the "switch cameras" icon in the upper right corner of the iPhone's Camera app so that the FaceTime camera's view is being displayed on the screen.  You will probably see yourself on the screen.

Now point the FaceTime camera at the LED end of your TV remote control and press a button on the remote.

Your eye can't see the IR light, but now you will see the IR light appear in the viewfinder as a bright white light.

It turns out that the FaceTime camera on an iPhone 4 does NOT have IR filtering on it!  Yay!

I hope this is useful to even just one person in the Instructables community.  Please use this information for good, and not for evil.
<p>I made myself a handy infrared flashlight from a battery-powered (3 x 1.5 V) reading light by unsoldering the white-light LED and soldering an infrared LED in its place. I then turned the room lights out, aimed the &quot;flashlight&quot; right at my face, and was rewarded by the sight of my right eye in the selfie cam image of my iPhone 4S- rendered in infrared! </p><p>Maybe a sufficiently bright IR lamp would let me walk around in the dark using my iPhone, but how do you do that with a front-facing camera?</p>
<p>my iphone 5 cant detect it ;(</p>
<br>Hi John_Singleton_ ...<br><br>That's weird.<br><br>I just upgraded from an iPhone 4s after many years to a 6s Plus, and both front and rear cameras are able to see the IR on my remote (unline my 4s)!<br><br>I guess it just depends on how much IR filtering each iPhone model was given.<br><br>Can you see the IR remote light on your &quot;selfie&quot; facing camera?<br><br>Thanks!<br>
Would the intensity of an IR light source make a difference on a IR filtered cell phone camera? <br>Ex. Hitting it with an IR floodlight used to assist night vision ?
I did not realize this, but my Samsung Galaxy S4 can see the IR with the high quality lense! Thanks for the info!
It works on my iPad Air 2 FaceTime camera
<p>Here's are some odd results: My old iPhone 4 picks up IR like a search light - both cameras. My iPhone 4S only the front camera, my iPod 5 touch very slightly on the front camera only. My iPad Air nothing on both.</p>
<p>Isn't this a &quot;frame rate&quot; issue? Maybe not issue, but the frame rate on newer iphones is higher.. We use this tool at work a lot, I have an S4 </p>
<p>Absolutely useful piece of info. </p>
<p>Thanks! Simple but *exactly* what I needed. I am trying to test a photo-interupter used on a circuit board (on a driveway gate opener of all things), I knew about the old-cell-phone-sees infrared trick, but of course the main camera on my iPhone 6 and every other digital camera I had handy had an IR filter and couldn't see IR when tested with a TV remote. Didn't occur to me to try the front camera, but it works perfectly on the iPhone 6 as well! On to testing my gate opener...</p>
<br>I have a slightly different story. I have a Samsung Galaxy III, on the lens that faces away from the screen, I can see dim purple dots blinking (that I can't see with my eyes) on my tv remote, but the rear facing lens (the lower quality one) I see a bright bluish-white light. So a not very dense filter on one and no filter on the other.
I can confirm that this works with the iPhone 4S too.
Works on my iphone 5 as well. Facetime camera, not the forward facing camera. Very cool. <br> <br>
<br>Hi GomanJorge... <br> <br>Excellent...thanks! Actually that's what I have. I should have specified. <br> <br>Thanks!
Cool, thanks!!
duh!!! any phone or camera... genius...
doesnt work with iphone 5. either camera.... :(
i can also confirm this works on both cameras of the motorola atrix 4g,.
As someone else stated, most digital cameras are immediately IR sensitive.. Even webcams on PC's, Laptops.. The majority of heat detector cameras used by the fire service, are based on a simple CCD array chip, as someone else noted, without a IR filter. I've done this to test IR remotes, IR-Xfer modules for laptops, PDA's, Even outdoor security cameras which have the lenses surrounded with IR-LED's.. (you should see how they look when driving by a place you know has a camera.. the whole doorway lights up!) I can't remember where I saw it, but someone had a hack, which required scraping the IR filter off the lens of one of the 'one-time-use' digital camcorders from CVS. (Pure Digital, of which the Kodak, &amp; FliP cameras are based.) A wee bit distructive, if you're not careful.. But, even with the IR filter in place, they're still pretty sensitive.
Typically CCD cameras are sensitive only up to ~1000nm or so. This means they are really near infra red (NIR) cameras. As such they are not very sensitive to heat. Heat detector cameras are true infrared cameras and sensitive to much longer wave lengths. Part of this is due to special lens materials used (eg Indium) which is much more transparent to IR than glass and plastic.
In all Of the Digital cameras we can see that!!!
Ha, neat! Works with both cameras on the iPad2.
Hi Makendo... <br> <br>I wonder if the iPad 3 has an IR filter on its primary camera. I'll bet it does. <br> <br>Thanks! <br>

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Bio: I'm the Founder and Chairman of TechShop.
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