| 摘要 |
PURPOSE:To make it possible to rapidly obtain a desired observation image within a short time, by providing a plurality of sonic wave lenses and a means for forming each observation image by the detection signal of each sonic wave lens. CONSTITUTION:Sonic wave propagation bodies 2 are parallelly arranged so as to separate a predetermined interval from the demand range of the exciting width and observation visual field of an exciting device 12 for scanning an x-direction. The signal taken out from each voltage membrane 3 and subsequently converted to a video signal is synchronized to the specimen positional informations (x, y) from a specimen stand driving power source 11 and the images of the minute areas on the specimen 5 respectively corresponding to said informations are displayed on a cathode ray tube 10. By this method, because an observation range becomes wide in proportion to the number of the arranged sonic wave propagation bodies, the objective observation image is rapidly obtained within a short time. |
