colour tubeの例文

• The final colour picture was created by combining the chrominance and luminance signals, but the technicians simply switched off the colour tubes whilst this dispute took place.
• With such a camera, a sharp black and white picture was always assured, as it was not necessary to combine signals from the three colour tubes to provide the luminance detail.
• Disadvantages of a four tube system were increased costs, a larger and heavier camera, and reduced light levels on the colour tubes ( light was  stolen by the luminance tube ), making such a camera less suitable for outside broadcasts in low ambient lighting.