Vision and the single photon (Invited Paper)

Details Vision and the single photon (Invited Paper) Vision and the single photon (Invited Paper)

Aug 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005spie.5866..332l&link_type=abstract

The Nature of Light: What Is a Photon?. Edited by Roychoudhuri, Chandrasekhar; Creath, Katherine. Proceedings of the SPIE, Volu

Physics

Scientific paper

The human visual system has an amazing sensitivity-even a single photon catch can trigger the release of a signal in a rod photoreceptor cell under certain circumstances. However, behaviorally it requires on an average 5-8 photons for a human to "see" a flash of light. This discrepancy is due to the intrinsic "dark noise" in the visual system. Various aspects of human visual sensitivity to single photons are reviewed and discussed.

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