Glossary term: 折射式望远镜
Description: 折射式望远镜是一种使用透镜作为主要集光元件的望远镜。折射式望远镜与反射式望远镜不同，后者使用反射镜作为主要集光元件。折射式望远镜仍然是业余爱好者常用的望远镜，通过特殊的镜片组合（“消色差望远镜”）来校正不良的色彩效应，可以为目视观测和天体摄影提供出色的图像质量。在专业天文学领域，从20世纪初开始，折射式望远镜在很大程度上被反射式望远镜所取代。天文学家希望获得更大的孔径（透镜或反射镜直径），但折射式望远镜的镜片尺寸很难超过一米。这是因为透镜仅允许在边缘处有支撑，导致沉重的透镜中心在重力作用下下垂，使透镜的形状和光学特性发生扭曲。
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Term and definition status: The original definition of this term in English have been approved by a research astronomer and a teacher The translation of this term and its definition is still awaiting approval
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