申请人:Cambridge Display Technology Limited
公开号:US20190219750A1
公开(公告)日:2019-07-18
A sensor comprising a light source (
103
); a photodetector (
105
); a sample receptacle such as a microfluidic device (
101
) between the light source and the photodetector; and one or both of a first light filter (
107
) and a second light filter (
109
) wherein the first light filter is provided between the sample receptacle and the photodetector and the second light filter is provided between the sample receptacle and the light source. The first light filter may comprise tartrazine. The second light filter may comprise Coomassie violet R200, Victoria Blue B or acid fuchsin. In use, light hν
1
emitted from the light source is absorbed by a luminescent indicator in the sample receptacle which then emits light hν
2
detected by the photodetector.