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首页> 外文会议>European Conference on Underwater Acoustics >SOUND PRESSURE FIELDS FOCUSED BY APLANATIC STRAUBEL ACOUSTIC MIRROR MADE OF ACRYLIC RESIN
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SOUND PRESSURE FIELDS FOCUSED BY APLANATIC STRAUBEL ACOUSTIC MIRROR MADE OF ACRYLIC RESIN

机译：由丙烯酸树脂制成的Aplanatic Straubel声学镜集中的声压场

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Underwater acoustic lenses, which form sound beams by the same principle as optical lenses, do not require any electrical circuits. Therefore, the lenses have advantages over conventional transducer arrays for underwater acoustic imaging because the lenses simplify devices in comparison to transducer arrays, and may be applied in various systems. For example, the autonomous underwater vehicle "URASHIMA" was equipped with singlet lens to provide forward obstacle avoidance sonar [1]. Additionally, dual-frequency identification sonar "DIDSON", which has been developed as handheld sonar, uses three acoustic lenses [2]. Large aperture acoustic lenses have been studied for ambient noise imaging [3]. We started the research of lens from a spherical lens [4] and have been studying various aspherical lenses for underwater imaging [5-9]. Acoustic mirrors are also effective device for reducing the sound attenuation because sound waves only propagate in water by total internal reflection. "ADONIS" is an example of an imaging system using a spherical mirror [10]. In the past study, we designed an aplanatic acoustic mirror which consists of two aspherical reflectors [11]. Then we designed an back-surface mirror which consists of an aspherical refracting surface and an aspherical reflector [12], and named the mirrors aplanatic Straubel (AS) mirrors because the original Straubel mirror developed by R. Straubel in 1915 [13] was improved to be aplanatic mirror without both spherical and coma aberrations.
机译：水下声透镜，通过与光学透镜相同的原理形成声梁，不需要任何电路。因此，透镜具有优于传统的换能器阵列，用于水下声学成像，因为镜片与换能器阵列相比简化了装置，并且可以应用于各种系统中。例如，自主水下车辆“urashima”配备单透镜，以提供前方障碍避免声纳[1]。此外，已作为手持Sonar开发的双频识别声纳“Didson”使用三个声镜[2]。已经研究了大型光圈声学镜片，用于环境噪声成像[3]。我们开始从球形镜片[4]的镜头的研究，并研究了用于水下成像的各种非球面镜片[5-9]。声学镜也是减少声音衰减的有效装置，因为声波仅通过全内反射在水中传播。 “Adonis”是使用球面镜的成像系统的示例[10]。在过去的研究中，我们设计了一个由两个非球面反射器组成的一张普通声学镜[11]。然后我们设计了一个背面镜，该背面镜包括非球面折射表面和非球面反射器[12]，并将镜子命名为镜子（AS）镜子，因为1915年的R. Straubel开发的原始Straubel镜子（13]得到改善在没有球形和昏迷的差距的情况下是一镜镜。

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