出典:Wikipedia
出典:『Wikipedia』 (2011/06/18 00:35 UTC 版)
A back-illuminated sensor, also known as backside illumination (BSI or BI), is a type of digital image sensor that uses a novel arrangement of the imaging elements to increase the amount of light captured and thereby improve low-light performance. The technique was used for some time in specialized roles like low-light security cameras and astronomy sensors, but was complex to build and required further refinement to become widely used. Sony was the first to solve these problems and introduce a consumer BI sensor, in their 5 Mpx 1.75 µm CMOS sensor introduced in 2009. The technology has been introduced by several other vendors such as HTC EVO 4G, and is a major selling point of the camera in the iPhone 4.