此方法可以修正测量透镜焦距忽略透镜厚度所产生的误差。

This method can correct the measurement of the thickness lens focal length lens produced by ignoring the error.

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研究了聚焦换能器的优化设计，对透镜厚度及材料的选取进行了分析。

Optimum design of focused transducers is studied, and the selection of thickness of lens and materials is discussed.

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透镜的厚度和质量令人印象深刻。

Thickness and quality of the glass are impressive.

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