Re: Will IR Illuminator work with any CCD Camera?

[Charles Sullivan <cwsulliv@xxxxxxxxxxxx>]

On Sun, 31 Dec 2006 13:11:41 -0500, Robert L Bass wrote:

>> The one thing you will find is that many
>> people who sell IR illuminators tend to
>> flat-out lie about their performance
>> (think used car salesmen).
>
> One source of confusion is that the camera manufacturers' literature often cites as range the maximum distance for "usable video."
> The problem with this is usable video equates to "you can see something happening out there."  If your only purpose is to know that
> something is happening but you don't care what it is or whjo is doing it, that would be ok.
>
>> My best performer is a forced air-cooled
>> 500 watt flood with an opaque IR filter.
>
> Sunlight also works well.  :^)

As I understand it, the reason for including an IR filter is that the
focal planes for IR and visible light are different enough that there's
a noticeable blur in the image if both sources are present, as in
sunlight.

I don't know to what extent this can be corrected by an achromatic
lens as is used to correct for chromatic aberation on quality visible
light cameras.