EMCCD technology, sometimes known as ‘on-chip multiplication’, is an innovation first introduced to the digital scientific imaging community by Andor Technology in 2001, with the launch of our dedicated, high-end iXon EMCCD Camera platform of ultra-sensitive cameras. Essentially, the EMCCD is an image sensor that is capable of detecting single photon events without an image intensifier, achievable by way of a unique electron multiplying structure built into the chip.
Read more about the EMCCD technology and cameras on Andor Technolog's website