camera sensitive to IR

[bk227865]

The cheap camera lens seems to have no IR filter.
So this may account for a lot of the blue fringes we see around bright spots in the photograps.

seems to be a cost saving tactic on many cheap digital camera's

The infrared light is detected as blue light , but has a different refraction index, so it shows up as an out of focus blue fringe around bright objects.

I have included a picture shining an remote to the camera to show the effect.

The remote emmits no visible light , yet the camera detects a blue lightsource.

[bk227865]

If you place a filter in front of the lens that filter out the VISIBLE light you can even make an "X-ray" camera out it for extra fun stuff.

Im not gonna explain that any further here , just look it up on google with words like "sony" "x-ray" "camera" and maybe "clothes" :twisted: :twisted: :twisted:

[knowsleyroader]

If you place a filter in front of the lens that filter out the VISIBLE light you can even make an "X-ray" camera out it for extra fun stuff.

Im not gonna explain that any further here , just look it up on google with words like "sony" "x-ray" "camera" and maybe "clothes" :twisted: :twisted: :twisted:

Spoilsport ! :wink:

[NexNo]

actually i've never seen a mobile phone camera or any pc-webcam that has an ir-filter. they all show ir-light. :wink:

[Bonzo]

I would go as far as to say: you are all wrong!
Our cameras have IR filters.
All webcams do!

The only problem is; it's not good enough..
Get yourself a cheap logitech camera, dismantle it, remove a small square piece of glass.

Connect the camera and see how much interference IR is giving!

The filters remove IR "radiation" light, but not enough to dampen a IR remote signal..

[NexNo]

I completly disassembled two webcams until now and there was no such thing unless the lens itself has ir-filter capabilitys. that doesn't have to mean that that's the standart case, but the pictures the cams took looked pretty much the same even with all crap removed. I don't think cheap cams (and pretty much all cams are cheap unless it's a digicam for 200$ or more) include an ir-filter.

[knowsleyroader]

If you place a filter in front of the lens that filter out the VISIBLE light you can even make an "X-ray" camera out it for extra fun stuff.

Im not gonna explain that any further here , just look it up on google with words like "sony" "x-ray" "camera" and maybe "clothes" :twisted: :twisted: :twisted:

Did you take that with your wizard ?

[Bonzo]

I completly disassembled two webcams until now and there was no such thing unless the lens itself has ir-filter capabilitys. that doesn't have to mean that that's the standart case, but the pictures the cams took looked pretty much the same even with all crap removed. I don't think cheap cams (and pretty much all cams are cheap unless it's a digicam for 200$ or more) include an ir-filter.

Well, the IR filter I picked out if my Logitech quick cam looks like a normal piece of glass, but if you see it from the side, you either get a green/turquoise color or red/pink color from it..
Look at your lenses; got the same color reflections?

[NexNo]

nope. no reflections at the lens as far as I can see it. and no little piece of glass either. maybe logitech does that since it's a more expensive cam? mine was really cheap.. reeeally cheap ^^ like 8 euros or so. an old "pencam" that I teared appart got rid of the plastic case and "built" a new case out of sticky tape ;) looks like a phreaky cocoon but is 1/3 the size of the original.

[bk227865]

Did you take that with your wizard ?

Yes,

Some remote controls have a black looking piece of plastic in front.
That is actually a filter that let's IR pass through but not visible light.

So i demollished an old remote control and with the makeshift black plastic filter taped in front of the lens i took a picture. Then i took a regular picture for comparison.

As you can see the leaves on the tree's are much lighter when viewed in IR. That is because they reflect IR radiation , (protecting themself from getting sunburned)

Ideally the sky in the IR image should register as very dark blue , but too much normal red light is seeping through the plastic filter.

[mrwell]

LOL, all cameras I've test since I was a child can detect IR beams from a remote. no matter if they have IR filters or not... No I'm 30 years old :twisted:

[hanmin]

Interesting... I get the same thing with my Charmer camera.

However, I was trying to shine my IR Remote to act as a torch light in total darkness, but doesn't seems to work. I need a much stronger IR light source.

[tweakradje]

When our son was born I bought a wireless video camera. Then after doing some research I removed the IR filter (there is a professional name for it, can't remember) and bought myself 8 powerfull IR leds, connected them to 12V.
It was like daylight in the middle of the night ;O)

The IR sensitivity of CMOS and CCD generaly doesn't go to much down the spectrum. Heat from a body is below that range.

Cheers

[cozzykim]

http://www.kaya-optics.com/products/overview.shtml

For a good, basic explanation of NIR

[NexNo]

When our son was born I bought a wireless video camera. Then after doing some research I removed the IR filter (there is a professional name for it, can't remember) and bought myself 8 powerfull IR leds, connected them to 12V.
It was like daylight in the middle of the night ;O)

Wow, that's what I call surveillance :twisted: ... big parent is watching you... ^^

[molski]

The cheap camera lens seems to have no IR filter.
So this may account for a lot of the blue fringes we see around bright spots in the photograps.

seems to be a cost saving tactic on many cheap digital camera's

The infrared light is detected as blue light , but has a different refraction index, so it shows up as an out of focus blue fringe around bright objects.

I have included a picture shining an remote to the camera to show the effect.

The remote emmits no visible light , yet the camera detects a blue lightsource.

A few days ago, I was making a photo of my laptop and when I looked into the camera, I saw a little light blinking what turns out to be the infrared port of my laptop, but it soesn't bother me at all, did not have any problems yest with the pictures I took.

[knowsleyroader]

Did you take that with your wizard ?

Yes,

Some remote controls have a black looking piece of plastic in front.
That is actually a filter that let's IR pass through but not visible light.

So i demollished an old remote control and with the makeshift black plastic filter taped in front of the lens i took a picture. Then i took a regular picture for comparison.

As you can see the leaves on the tree's are much lighter when viewed in IR. That is because they reflect IR radiation , (protecting themself from getting sunburned)

Ideally the sky in the IR image should register as very dark blue , but too much normal red light is seeping through the plastic filter.

So If I go to a boot sale and find any old type remote with a docking big brown/black front cover over the ir would that work ?

[NexNo]

guys guys guys this will clear it all up ...
just read this
http://www.hoagieshouse.com/IR/
found here http://www.hackaday.com/entry/1234000110036028/

have fun browsing :wink:

[MuF123]

any ideas how to remove IR filter from Wizard?
I've done that on nokia 3110c (destructive method) and on webcam MS vx1000(?) and there was the filter just sitting, no glue.

can be wizard modded? any ideas/hints/pictures/tutorials? :)