| 摘要 |
PURPOSE:To obtain an ultrasonic probe excellent in the performance with a limited grating rope, by setting the sum of the width of a columnar piezo-electric body composing a compound piezoelectric body and the width of an organic part to fill a gap therein at no more than one wavelength. CONSTITUTION:An ultrasonic probe 302 is made up of a compound piezo-electric material 301 which is composed so that the sum of the width of a columnar piezo-electric material 303 and that of an organic part to fill a gap therein will be no more than one wavelength of an ultrasonic wave. Common electrodes are formed on the top and undersurface of the material 301 respectively to apply an electrical signal thereto through respective leads. An observation shaft 305 is positioned at a distance 307 from the center 306 of material 301 in an x-y plane and is at an angle 308 deg. to the y axis. The center shaft 309 of the probe 302 aligns the z axis. The level of a grating rope is evaluated from the array of the material 303 and geometric relationship of the observation shaft 305. The grating rope can be reduced by setting the range of the interval between elements less than one wavelength. |
