The discussion centers on the feasibility of creating a persistent light dot for holography by rotating a coherent laser beam at high angular frequencies. Participants explore the implications of rotating the beam about an axis normal to the laser, questioning whether this could yield a radiant glow due to persistence of vision. The conversation also touches on the potential effects of using excitation of the medium, such as two-photon excitation, to enhance the visual output. The consensus indicates that while a linear fall-off from the point of rotation is expected, alternative methods may yield different results.
PREREQUISITESOptical engineers, holography researchers, and anyone interested in advanced laser applications and visual perception technologies.
Rotate about which axis? Do you mean like with scanning laser displays?hackhard said:
rotates about axis normal to laser beam .berkeman said:
You mean there is only one point in space (filled with some scattering medium like air), where the beam always passes? You will get an approx. linear fall-off from that point. Maybe if instead of scattering you use some form of excitation of the medium, you might get different effects.hackhard said:
please explainA.T. said: