InGaAs image sensors contain a CMOS IC readout circuit for signal operation. InGaAs image sensors have the capability to cover visible (VIS), near infrared (NIR), and short wavelength infrared (SWIR) regions. InGaAs image sensors are classified into two types: InGaAs linear image sensors and InGaAs area image sensors. InGaAs linear images sensors are one-dimensional image sensors operational in visible (VIS), near infrared (NIR), and short wavelength infrared (SWIR) regions, while InGaAs area image sensors are two-dimensional image sensors that are operational in near infrared (NIR) and short wavelength infrared (SWIR) regions. InGaAs image sensors are utilized in various applications such as thermal imaging monitor, laser beam profiler, plastic recycling, food inspection, and laboratory measurement.