| 摘要 |
<p>An imaging system comprising a photon source, such as a burst illumination laser (1), fires photon pulses (2) into an optical device, such as a nonlinear crystal (3), which causes each source photon to be split into two (or more), entangled photons (4a, 4b), as described above. At least one of the entangled photons (4a) is directed (by the crystal or other optical elements, not shown) toward a first gated camera (7), which is synchronised with the start of each pulse. The remaining entangled photon(s) (4b) is/are directed toward a target (5) which may be partially or completely concealed by a barrier (6). Photons reflected from the target (5) are received by a second gated camera (8) and a quantum correlation circuit (9) compares photons received at the second gated camera (8) with those received at the first gated camera (7) to determine if they originate from the source (1). If so, they are used to generate an image of the target (5). If not, the photons are discarded as noise.</p> |
