Séminaire de Jean-Marc Fournier: Construction of colors by organized matter
- Science et Société
Publié le 25 février 2022
–
Mis à jour le 16 janvier 2023
Date(s)
le 3 juin 2022
11:00
Lieu(x)
site Sophia et on-line
Construction of colors by organized matter
Jean-Marc Fournier
Some vivid colors displayed in nature are generated by the interaction of light with fine geometrical structures. This process does not require any pigment to filter wavelengths in the illuminating spectrum.Similarly, the Lippmann Interferential Photographic Process lies on black and white emulsions to make outstanding color pictures. Spaced silver layers collectively reflect narrow or wide band of wavelengths, duplicating closely the ones of the light used at the recording stage, then creating "physical colors".
A description of the mechanism involved will be supported by experimental analysis of Lippmann photographs.
The elegance of the science involved in Lippmann photography and its technological requirements will be addressed. Its powerful cultural impact remains an intriguing story. Such a picture will be displayed to assess the longevity of the process.
