Microlenses for acoustic printing

Details Microlenses for acoustic printing Microlenses for acoustic printing

1986-12-19

1988-06-14

Hartary, Joseph W.

Recorders

Markers and/or driving means therefor

With ink supply to marker

310335, G01D 1516

Patent

active

047515295

ABSTRACT:
A printhead for an acoustic printer comprises one or more acoustic microlenses, each of which brings an acoustic beam to focus approximately at the free surface of a pool of ink for ejecting individual droplets of ink from the pool on demand. As used herein, an "acoustic microlens" is defined as being an acoustic lens having an aperture diameter which is less than an order of magnitude greater than the wavelength of the incident acoustic wave (i.e., the acoustic wave which illuminates the lens).

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Quate, Calvin F., "The Acoustic Microscope", Scientific American, vol. 241, No. 4, Oct. 1979, pp. 62-70.
Quate, Calvin F., "Acoustic Microscopy", American Institute of Physics, Physics Today, Aug. 1985, pp. 34-42.

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