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球型透镜(Ball Lenses)是直径较小的光学玻璃珠,用于提高光纤、发射器及检测器之间的信号耦,提高信号质量,也可应用于内镜、条码扫描、非球面透镜的预加工材料、传感器等。球形透镜具有比普通凸透镜更短的焦距和更大的放大倍数,它的焦距取决于材质本身的折射率。因为球透镜后焦距短,从而能够较大限度地减少从球透镜到光纤所需的距离,所以球形透镜主要用于光纤应用中。

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