Specialized Scientific Sensors Scientific and industrial imaging often requires sensors that operate far outside the capabilities of standard equipment. By allowing every pixel to capture the full spectrum of light, these sensors achieve superior light sensitivity and dynamic range.
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These sensors prioritize different characteristics, such as extreme speed, sensitivity in low light, or spectral range beyond human vision. By moving the wiring to the rear of the silicon substrate, BSI allows light to strike the photosensitive area directly.
Core Technologies: CMOS and CCD The vast majority of image sensors in use today fall into two primary categories: CMOS (Complementary Metal-Oxide-Semiconductor) and CCD (Charge-Coupled Device). Pixel Structure and Fill Factor Beyond the overarching technology, the physical structure of individual pixels plays a critical role in sensor performance.
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While early CMOS sensors suffered from higher noise levels compared to their CCD counterparts, advances in fabrication technology and pixel design have allowed modern CMOS sensors to surpass CCDs in nearly every metric, including dynamic range and sensitivity. These sensors may be cooled to cryogenic temperatures to minimize thermal noise during long exposures, or they may be specifically calibrated to capture ultraviolet or infrared light.
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