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Doktor Jon does his bit to help
The proprietor knows that there's a constant problem with drug dealing in quiet corners of the club, but from a technical viewpoint, its an absolute pig to try and monitor on CCTV .... or is it?
In any environment where lighting levels are poor, or the club rigs produce large amounts of pulsed or strobed illumination, there is one possible technique which can be tried ..... get rid of the lighting.
First off, youll need to use a high resolution and high sensitivity Black and White camera; well to be totally accurate, it actually needs to be highly Infra Red (IR) sensitive as well.
Whatever lens is fitted to the camera, it will need to have an IR 'pass' filter (between 800 - 900nM light frequency to be ever so technical) placed over the front of the lens, so that all other visible frequencies of light are prevented from reaching the cameras imaging sensor (the CCD); its important to mention that whenever cameras are required to work under Infra Red, the focus should be set under operating conditions, and not the ambient white room lighting, otherwise youll possibly end up with fuzzy pictures.
Next up, discreetly position a wall mounted high power (850nM) Infra Red illuminator as an uplighter, so that all the light energy is thrown straight up to the ceiling (if the club is being run in a disused cathederal, you may have a few problems!).
The illuminator itself will not arouse any suspicions, as its already pointing upwards, and doesnt appear to be switched on!
Dont forget the warning signs about CCTV in operation, and drug offenders will be dealt with by the police ....
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