Photosensor

特許 権利維持 Photosensors or photodetectors are sensors of light or other electromagnetic energy. There are several varieties:[1] Active-pixel sensors (APSs) are image sensors. Usually made in a CMOS process, and also known as CMOS image sensors, APSs are commonly used in cell phone cameras, web cameras, and some DSLRs. Charge-coupled devices (CCD), which are used to record images in astronomy, digital photography, and digital cinematography. Before the 1990s, photographic plates were most common in astronomy. The next generation of astronomical instruments, such as the Astro-E2, include cryogenic detectors. In experimental particle physics, a particle detector is a device used to track and identify elementary particles. Chemical detectors, such as photographic plates, in which a silver halide molecule is split into an atom of metallic silver and a halogen atom. The photographic developer causes adjacent molecules to split similarly.