Profile: Photek Ltd manufactures vacuum based tubes and camera systems for photon detection. We manufacture image intensifiers, PMT's, streak tubes and a range of associated electronics & camera systems. Image intensifiers amplify low light levels for applications such as astronomy, high speed imaging, photon counting and fluorescence lifetime measurement. Our image intensifiers provide the performance in terms of resolution, speed of response and in-service reliability. Our intensifiers can be supplied with integral high voltage power supplies and ultra-high speed gate units customised to meet the requirements of a specific application. Fluorescence camera & detector system is designed specifically for fluorescence lifetime imaging (FLIM) applications. It is able to operate in both photon counting and low gain (linear) modes. Special software has been developed to allow the acquisition of fluorescence decay images.