Resources Contact Us Home
Ultrasonic transducer

Image Number 10 for United States Patent #4881212.

This invention is basically, an ultrasonic transducer that can be configured with good reproducibility, that includes an acoustic impedance matching member that gradually changes the acoustic impedance, and which is characterized byAn acoustic impedance matching member(2) configured with multiple unit layers (21, 22, 23, . . . 2n), each layer being thinner than a quarter-wavelength of an ultrasonic wave, andeach unit layer having a laiminated structure make up of heavy metal(52) and plastic(51) layers with a thickness ratio set between them to change gradually from the unit layer close to the ultrasonic oscillator to the unit layer close to the subject.

  Recently Added Patents
MiR 204, miR 211, their anti-miRs, and therapeutic uses of same
Estimating travel time
Phase-change memory device having multiple diodes
Systems and methods for reducing narrow bandwidth interference contained in broad bandwidth signals
Near-field optical disk having surface plasmon amplification by stimulated emission of radiation
Semiconductor device having trapezoidal shaped trenches
Weighted determination in configuration management systems
  Randomly Featured Patents
Display control method for video display system and video display system
2-(Amino acid-thio)-1-carbapen-2-em-3-carboxylic acids and congeners
Preloaded bearing assembly for rotating anode X-ray tubes
Poly-dicarbon monofluoride
Maize variety PHV5W
Communication apparatus and communication method
Plant control system
Retainer strap
Valve assembly
Detection of an attack such as a pre-attack on a computer network