Resources Contact Us Home
Acoustic lens for use in acoustic microscope

Image Number 13 for United States Patent #4881618.

An acoustic lens for use in an acoustic microscope including a solid state medium for propagating an acoustic wave having a wavelength .lambda. and having opposed end surfaces, an electric-acoustic transducer applied on one end surface of the solid state medium and having a radius a, and a spherical lens portion formed in the other end surface of the solid state medium and having an aperture of a radius w. The length l and the aperture radius w are normalized by the transducer radius a such that Z=l.lambda./a.sup.2 and W=w/a. Values of Z and W are selected from such a region in a first quadrant of the Z-W coordinate system that desired power and/or phase are obtained. The region neighboring the point Z=1 and W=1 is excluded.

  Recently Added Patents
Variable delay line for delay locked loop
Communication apparatus, power supply control method, display apparatus, communication method, and computer program product
Cathode active material and lithium secondary battery comprising the same
Circuit for compressing data and a processor employing same
Portable computer
Systems and methods for adaptive error thresholds or adaptive modulation schemes based on atmospheric conditions
Interferer region identification using image processing
  Randomly Featured Patents
Branched ionomers
Preparation of serum-free suspensions of human hematopoietic cells or precursor cells
Castellated nozzle and method of use thereof
Sequential detonation of explosive charges
Method of making a semiconductor device
Program development system
Non-volatile semiconductor memory device and memory system using the same
Universal adapter pressure cap
Swedging tool structure and use