What is the terminology for colour sensors?

Colour sensors are divided into three different kinds: light to photocurrent conversion, light to simulated analogue working voltage conversion, and light to data conversion. The former kind generally implies only a keyed part of the specific colour sensor, due to the fact that the initial photocurrent is extremely low in strength, and has been prescribed to become larger in order to convert the photocurrent to a usable level. Therefore, the best used analogue output colour sensors will have a minimum of a trans-characteristic impedance amplifier and give a working voltage output.