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If you need basic technical information
As Doktor Jon has already mentioned on this site, discussing covert camera designs is not always an appropriate thing to do.
Most commercial off the shelf units are based on a few simple disguises, which hide a fairly standard PCB type camera module.
Some of the more common and documented designs are PIR sensors and smoke detectors, although of course, their are many others available. In general terms, picture quality is o.k. within a limited range, but with the relatively slow pinhole lens, the room needs to be reasonably bright to achieve anything approaching a quality image.
VEHICLE MOUNT CAMERAS
Once again, the ubiquitous PCB camera module rears its head, as the now standard imaging engine for these specialist surveillance cameras. Whilst most are used on custom built commercial vehicles such as dustcarts or tipper trucks, they can generally be applied as a very useful safety device for reversing or industrial operations.
In recent years, an increasing number have been fitted to all types of public transport, in the name of passenger and driver safety, although some conventional cameras are also fitted into public service vehicles, not just for internal security applications, but also for bus lane and traffic enforcement purposes.
In addition, a wide range of specialist applications, for example in the agricultural sector, are daily monitored by hard working, low voltage powered, CCTV surveillance cameras. Harvester operations, slurry tanker injectors, tractor vision systems, the range of applications is quite literally growing all the time.
Whether it be trains or boats or planes,there are now literally hundreds of thousands of Closed Circuit Television cameras employed on vehicles worldwide, purely as a safety or process monitoring device.
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