| 摘要 |
PURPOSE:To impart a good reflected signal even to a specimen inferior to a reflective characteristic and to easily discriminate the reflected sonic wave from the interface of water and a lens, and that from the specimen, by providing an acoustical reflective mirror to the lower part of the specimen. CONSTITUTION:An RF electric signal is applied to the lens 120 provided to a piezoelectric thin film 110 to generate focusing ultrasonic beam 170. A specimen system, wherein an organism specimen 140 is held between two extremely thin Mylar films 130, 150, is placed to the focal region of beam. In this invention, a concaved reflective mirror 160 arranged so as to be positioned at the common focus with the lens 120 is provided and the specimen system surrounded by a medium 180. When this constitution is used and ultrasonic beam generated in the lens 120 transmits the specimen 140, it is reflected by a reflective mirror 160 and again transmits the specimen 140 to be condensed by the lens 120. Because the reflected ultrasonic wave obtained by this constitution transmits the specimen 140 two times, the transmission information of the specimen 140 is reflected in the similar way as conventional constitution. |
