| 摘要 |
PURPOSE:To enable a plurality of pieces of information which are in series in depth direction of an object to be measured to be taken out at one operation and an optimum gain for forming an image to be set to a signal-reception circuit for extracting each reflection component. CONSTITUTION:An ultrasonic microscope consists of a transmission portion 1 for generating a high-frequency transmission signal and an electrical - acoustic conversion portion 3 for changing a transmission signal into a supersonic wave, emitting it to the object to be measured, and then converting the reflection wave into a reflection signal, thus enabling a plurality of reflection wave components of the object to be measured to be extracted from the reflection signal and then an internal structure of the object to be measured to be formed as an image. A plurality of reception circuits 6 which are connected in parallel to an output terminal of the acoustic- electrical conversion portion 3, extracts mutually different reflection wave components from each input reflection signal from the electrical-acoustic conversion element 3, and at the same time sets a gain for each reflection component individually and a gain control means 7 which controls a gain of each reception circuit according to a signal strength of the reflection wave component to be extracted from each reception circuit are provided. |
