NORPS-12

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Optical Sensors - Photo Detectors - CdS Cells

CdS cells, cadmium sulfide cells also known as photoconductive cells, are very useful devices in many applications in the field of photometry. As a photodetector, they are able to detect the intensity of light so as to give an indication of the amount of energy or even the presence of radiation. Additionally, their status as an optical sensor is also used in the field of photolitography to create masks and patterns or in the analysis of light spectrums used for color and luminescence.

TheNORPS-12 is a self-contained optical sensor of new generation developed by a Joint Industry Group led by Advanced Micro Devices. It is based on inorganic CdS photodetectors. This device includes simple power and AND/OR logic in a single package, features solid-state operation, and offers superior reliability in outdoor, industrial, and automotive applications. It is designed to respond to incident light over a 90◦ cone angle and to operate over a wide range of ambient temperatures. Its output is a logic-level signal that will trigger a variety of applications. The temperature range of this device is between -40°C to 85°C.

Theworking principle of this NORPS-12 photodetector is based on the “photoelectric effect”. This phenomenon states that when a photon hits an atom or molecule, it can excite an electron, which can then be released and used to generate a current. This is what happens when a photon hits a cadmium sulfide cell. The electrons created from the photon will be attracted to the other end of the semiconductor material, where it will flow in a current. This current is then used to determine the amount of energy or lightthat was incident upon the material.

TheNORPS-12 photodetector is made up of two opaque electrodes on a thin semiconductor sheet. The electrodes are either made of gold or carbon and are connected to a voltage source. A photon impinging the semiconductor releases an electron which produces a current as it moves toward the anode. This current can be measured and is proportional to the amount of light that was incident upon the cell. Therefore, this photodetectoris able to accurately detect the wavelength, angle of incidence, and intensity of the incident light.

ThisNORPS-12 has many applications within the field of photoelectrical science, such as in photometry, photolitography, and in the analysis of light spectrums for color and luminescence. Examples of specific applications include light measuring instruments, photographic apparatus, lens iris control, and even color separation devices. Additionally, the NORPS-12 also has automotive applications such as automatic headlights and brake lights.

In conclusion, the NORPS-12 inorganic CdS photodetector is a major breakthrough in optical sensing technology due to its durability and simple operation. The device is based on the principle of the “photoelectric effect” and is able to detect light accurately over a wide range of temperatures. Furthermore, the NORPS-12 has a wide range of applications from optical sensing, photometry, and photolithography to automotive applications.

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