Idea: Fluidised flour bed for opticle table stability?

So, when making holograms, the total movement between the light, film, and object can’t be more than 1/2 to 1/4 the wavelength of the color of light you’re using (red is around 650nm). The less movement, the better.

Would flowing air into a block of flour (baking soda, or something similar), supporting the optical table, work to isolate vibrations? It would act like a super dampened spring. Adjusting the airflow would increase the amount of air in the block which would, I assume, increase the spring effect and lower the spring constant. Since the exposure time for a hologram is less than 30 seconds, only a small amount of air would be required. Ideally the air would come from a compressed tank since pumping usually creates pulses of air. The air could be let in through a grid of openings at the bottom or an array throughout the block. I’m guessing that letting the air flow then lowering the table would be best. I assume settling would be very fast, maybe a few minutes.