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Welcome to the "History of CCTV" Section | |||||||||||||||||||||||||||||||
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Shibaden SV 610K 'open reel' video recorder - circa 1975 | |||||||||||||||||||||||||||||||
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Colour has of course become the preferred choice over the last seven years or so, but the bulk of the existing monitor market is still squarely based on good old fashioned proven CRT technology. In the last few years, manufacturers have started to produce very high quality TFT (Thin Film Transistor) flat screen LCD displays, which for the industry standard high resolution 14” model, are pro rata about two to three times the cost of an equivalent CRT unit. With a long life span, high quality images, low radiation output and little risk of image retention, flat screens are very much the shape of things to come, but as yet, the price is still not quite right. Doktor Jon comfortably predicts that by the end of 2006, the CCTV industry will be committing itself wholeheartedly to the adoption of this relatively new technology, with CRT production likely to finally cease some time towards the end of the decade. For the larger control room, hugely expensive big screen Plasma Displays will continue to grow in popularity in the short term. Although they are generally an expensive investment, unless existing technical limitations are overcome quickly, it is quite likely that the next generation of large panel TFT displays will reduce in cost, to make them the more attractive proposition when the original Plasma units come up for replacement in a few years time. But what about video recorders , I hear you ask? Well, twenty five years ago, whilst Time Lapse video recording was still somewhat in its infancy, there were a limited number of very usable video tape machines , made by manufacturers such as Ikegami, National, Sanyo and Shibaden. Unlike the modern equivalents, these all used large spools of open reel 1/2” tape, which despite the apparent crudity of the design, did actually produce very good quality recorded images; in fact, the average 250 lines resolution for Black & White recording, is not disimilar from that achieved by many current
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