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Infrared image sensors convert infrared rays into electrical signals to acquire necessary information, and can detect infrared rays emitted from people and objects even in the dark. Therefore, infrared image sensors are utilized in various fields to provide a safe and secure social infrastructure, such as night vision to support automobiles driving in the darkness, aircraft navigation support systems and security cameras.
There are two types of infrared image sensors, the “cooled type,” which operates at extremely low temperatures, and the “uncooled type,” which operates near room temperature. The cooled type is highly sensitive and responsive, but requires a cooler, which is large, expensive, consumes a great deal of electricity, and requires regular maintenance. On the other hand, the uncooled type does not require a cooler, enabling it to be compact, inexpensive, and to consume low power, but it has the issues of inferior sensitivity and resolution compared to the cooled type.
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