Calculation Model of Ultrasonic Field of Angle Probe Using Geometrical Optics Approximation and Rayleigh Integral — Relation to Ermolov and Virtual Transducer Models

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  • 幾何光学近似とRayleigh積分による斜角探触子の音場計算モデル — Ermolov モデルと見掛けの振動子モデルとの関連性
  • 幾何光学近似とRayleigh積分による斜角探触子の音場計算モデル--Ermolovモデルと見掛けの振動子モデルとの関連性
  • キカ コウガク キンジ ト Rayleigh セキブン ニ ヨル シャカク タンショクシ ノ オンバ ケイサン モデル Ermolov モデル ト ミカケ ノ シンドウシ モデル トノ カンレンセイ

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Abstract

A calculation model of the ultrasonic field of an angle probe using geometrical optics approximation and Rayleigh integral (GORI) is shown, and the relation of this model to Ermolov one and virtual transducer one is discussed. The GORI model is equivalent to the Ermolov one under certain conditions, and these conditions are made clear. Although several similarities exist between the GORI model and the virtual transducer one, cause of error exists in calculation of directivity using the virtual latter. A simple calculation model of directivity is derived in a far field based on the GORI two-dimensional model.

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