[OT]IR firewire cam suggestions

Sep 19, 2006 at 8:14pm

[OT]IR firewire cam suggestions

Anyone have an easy experience removing a infrared filter from a
firewire cam? I would like to stay under 150 bucks.

your aspiring Jeff Han
-matt

#27695
Sep 19, 2006 at 9:38pm

the monochrome fire-i board level camera from Unibrain has no IR
filter on the CCD.
the IR coating is on the miniature (M12) lenses that they offer.
there are M12 lenses without IR coating, but they are hard to find.

It pays to use a C mount lens, you capture much more light.
somewhat more expensive, but given that CCD is not very sensitive to IR,
you’re gonna need every photon you can get.

you can order a C/CS mount adapter for the fire-i from unibrain.
be sure to buy a non-IR-coated C/CS lens, but they are easy to find.

if you are using monochromatic IR light, you need not get a “IR lens”.
these are expensive lenses with special coatings to make the IR light
focus on the same plane as visible light.

HtH
-jennek

On 19-sep-2006, at 20:14, matthew aidekman wrote:

> Anyone have an easy experience removing a infrared filter from a
> firewire cam? I would like to stay under 150 bucks.
>
> your aspiring Jeff Han
> -matt
>

#84067
Sep 19, 2006 at 10:10pm

jennek thanks for the tip ill try that
funny thing, i bought the ir coated 2.1 lens form uninibrain, emailed back
to them they confirmed it was ir coated but after slapping a daylight cutout
filter over the lens it still gave me acceptable ir. i am still puzzled.
sidenote> once hacked a cheap spycam with a small piece of negative film,
it works but you need a much brighter ir source as it degrades the optics.
it is documented on the web, run a search on hackaday.com

2006/9/20, jennek geels :
>
> the monochrome fire-i board level camera from Unibrain has no IR
> filter on the CCD.
> the IR coating is on the miniature (M12) lenses that they offer.
> there are M12 lenses without IR coating, but they are hard to find.
>
> It pays to use a C mount lens, you capture much more light.
> somewhat more expensive, but given that CCD is not very sensitive to IR,
> you’re gonna need every photon you can get.
>
> you can order a C/CS mount adapter for the fire-i from unibrain.
> be sure to buy a non-IR-coated C/CS lens, but they are easy to find.
>
> if you are using monochromatic IR light, you need not get a “IR lens”.
> these are expensive lenses with special coatings to make the IR light
> focus on the same plane as visible light.
>
> HtH
> -jennek
>
> On 19-sep-2006, at 20:14, matthew aidekman wrote:
>
> > Anyone have an easy experience removing a infrared filter from a
> > firewire cam? I would like to stay under 150 bucks.
> >
> > your aspiring Jeff Han
> > -matt
> >
>
>

#84068

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