Can a Rotating Coherent Laser Beam Create a Persistent Light Dot for Holography?

[hackhard]

if a coherent laser beam rotates about an axis at very high angular frequency
can a light dot with radiant glow (of short radius) be obtained due to persistence of vision ?

 

[berkeman]

if a coherent laser beam rotates about an axis at very high angular frequency
can a light dot with radiant glow (of short radius) be obtained due to persistence of vision ?

Rotate about which axis? Do you mean like with scanning laser displays?

http://www.covesion.com/assets/images/laser-display.jpg
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[hackhard]

Rotate about which axis?

rotates about axis normal to laser beam .

 

[A.T.]

if a coherent laser beam rotates about an axis at very high angular frequency
can a light dot with radiant glow (of short radius) be obtained due to persistence of vision ?

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]

you use some form of excitation of the medium

please explain

 

[A.T.]

https://en.wikipedia.org/wiki/Two-photon_excitation_microscopy

 

[hackhard]

can this concept be employed in holography