fotodiodearray

A photodiode array is a semiconductor device consisting of multiple photodiodes arranged in a linear or two-dimensional grid. Each photodiode in the array acts as a light sensor, converting incident photons into an electrical current or voltage. When light strikes a photodiode, it generates electron-hole pairs. The applied voltage across the photodiode causes these charge carriers to drift, creating a measurable current proportional to the light intensity. By arranging these individual photodiodes in an array, it becomes possible to detect and measure light across a spatial distribution.

Photodiode arrays are used in a variety of applications where imaging or spatial light detection is required. In digital cameras, they form the basis of image sensors, capturing light to create photographs. They are also employed in scanners, barcode readers, and optical character recognition systems. In scientific instrumentation, photodiode arrays can be found in spectrometers to analyze light dispersion and in medical imaging devices. The resolution and performance of a photodiode array are determined by the number of photodiodes, their size and spacing, and the readout electronics used to process the signals from each element. Different types of photodiodes, such as silicon or InGaAs, can be used depending on the desired spectral response.