Question

(d)
Write a short note on censor for TV camera. for 5 marks​

Answer 1

Television cameras and displays

Camera image sensors

The television camera is a device that employs light-sensitive image sensors to convert an optical image into a sequence of electrical signals—in other words, to generate the primary components of the picture signal. The first sensors were mechanical spinning disks, based on a prototype patented by the German Paul Nipkow in 1884. As the disk rotated, light reflected from the scene passed through a series of apertures in the disk and entered a photoelectric cell, which translated the sequence of light values into a corresponding sequence of electric values. In this way the entire scene was scanned, one line at a time, and converted into an electric signal.

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