Cathode Ray Tube Recycling in South Africa

The Channel Multiplier Cathode-ray Tube

This paper describes a new approach to cathode-ray tube design aimed at achieving a significant depth reduction. The addressing function of the electron beam has been separated from the light generation process by a channel electron multiplier array, allowing the use of a novel deflection system based on a low-power scanning beam. Monochrome versions of the thin tube have been made with a 12" (...

Recycling of Cathode Ray Tubes (CRTs) in electronic waste

Luminance artifacts of cathode-ray tube displays for vision research.

Phosphor persistence, video bandwidth, DC restoration and high-voltage regulation affect the appearance of images presented on cathode-ray tubes (CRTs), potentially resulting in differences between nominal and actual stimuli. We illustrate these effects by measuring physical parameters of horizontal and vertical static and counter-phase flickering gratings, and we illustrate problems for vision...

Use of computers and cathode-ray-tube displays in visual psychophysics. Part I

Computers have become so much a part of our lives that it takes a power failure to remind us of their presence. One area in which they have become indispensable is in the methodology of visual psychophysics, which forms the topic of this special issue. A typical laboratory setup for psychophysics, two decades ago, was a Maxwellianview system and an optical bench-perhaps linked to a PDP-11 `labo...

The Effect of South African Geopolitical Position in the Development of Cinema in South Africa

This paper will discuss about the role of the geopolitical location of South Africa in the development of movie and the cinema industry in this country. Despite of bringing ci-nema to South Africa by white Europeans, but the development of this phenomenon is mostly due to the geopolitical position of this country. It is interesting to know that ci-nema reached Africa in much the same time as it...