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Acoustic Antireflection Coating

CH2—CI2—) —(—CF2— CFH—) (39). Ceramic crystals have a higher piezoelectric efficiency. Their high acoustic impedance compared to body tissues necessitates impedance matching layers between the piezoelectric and the tissue. These layers are similar in function to the antireflective coatings on a lens. Polymer piezoelectric materials possess a more favorable impedance relative to body tissues but have poorer performance characteristics. Newer transducer materials are piezoelectric composites containing ceramic crystals embedded in a polymer matrix (see Composite materials, polymer-MATRIX Piezoelectrics). [Pg.52]

Kushibiki, J., Sannomiya, T., and Chubachi, N. (1980). Performance of sputtered Si02 film as an acoustic antireflection coating at sapphire/water interface. Electron. Lett. 16, 737-8. [57]... [Pg.335]

See other pages where Acoustic Antireflection Coating is mentioned: [Pg.58]    [Pg.348]    [Pg.18]    [Pg.37]    [Pg.391]    [Pg.386]    [Pg.418]   
See also in sourсe #XX -- [ Pg.58 ]



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