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光管采用内部全反射原理，无论其光谱特性如何, 都将非均匀光源换成均匀光源。 与方形结构的导光管相比，六角结构导光管可使光损失降低35%。 由于材料特性以及加工难度的影响，大口径以及工作在红外 波段的平行光管，往往采用反射式光路设计（如离轴抛物面镜），以消除色差并实现宽波段覆盖。 一般的萤光管以 玻璃 制造，在两端装有插口以连接电源及固定萤光管的位置。 与 电灯泡 不同，萤光管必须设有 镇流器，与 启辉器 配合产生让气体发生电离的瞬间高压。
如何根据实际需求精准选型实现性能与价格的协调性，是众多科研人员与工程师面临的关键问题。 下面，就为大家初步介绍平行光管的选型方案。
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