The discussion centers on the possibility of creating a persistent light dot using a rotating coherent laser beam, specifically exploring the implications of persistence of vision and its potential applications in holography. The conversation includes technical considerations regarding the rotation axis and the medium involved.
The discussion contains multiple competing views regarding the feasibility and implications of using a rotating laser beam to create a persistent light dot. No consensus has been reached on the effectiveness or application of this concept.
Participants have not fully explored the assumptions regarding the medium used or the specific conditions under which the light dot may be created. The discussion remains open to various interpretations and applications.
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: