Welcome to the
Making light of a dark place ...
Over the last few pages, we've looked at various aspects of using Infra Red lighting to achieve the highest quality images at night. Here in no particular order are a few more points worthy of consideration.
1) As light frequency increases above 685nM, it becomes invisible to the human eye, but some CCTV cameras can work up to 1200nM!!
3) Apart from modern Solid State Light Emitting Diode (LED) arrays, most hot filament bulbs are also extremely rich in Infra Red output
5) Some IR illuminator manufacturers increase reliabilty by using a number of seperate bulbs (e.g. 4 x 50 Watt to achieve 200W output).
7) Never place a tungsten filament IR lamp directly under a camera housing; as the heat rises, it will gently cook the camera.
9) When changing a tungsten halogen bulb, avoid directly touching the glass envelope, as the effects of sweat can seriously damage it.
If you would like to see further information on any aspect of using Infra Red, e-mail to:- info[at]doktorjon.co.uk
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