The analog-to-digital converter (ADC) is positioned between the TV camera tube
or CCD and the computer.
Before the advent of digital image sensing devices, analog image sensors used to function with the video camera tubes
. These tubes are replaced by digital technologies such as CCD and CMOS image sensors.
Narragansett Technologies and its two divisions, Narragansett Imaging and Narragansett EMS, originally made a name for itself in the digital imaging market as a division of the Philips Components group, designing and manufacturing medical camera tubes
and digital imaging modules.
The history incorporates technology such as vacuum and sensitive camera tubes
, field-sequential and compatible color, color picture tubes, projectors, transmission, delayed broadcasting, and digital television.
Cathodeon was incorporated in 1935 as the 'vacuum physics laboratory' of the consumer electronics group Pye of Cambridge, initially working on camera tubes
for the fledgling television broadcast industry.
Before the digital era, analog image sensors functioned with video camera tubes
, which are now replaced by digital technologies such as charge-coupled device (CCD) and complementary metal-oxide-semiconductor (CMOS) image sensors.