以下为句子列表：
英文: An optical transmission system including several concave mirrors is designed to improve the sensitivity of measurement by extending the optical path for measurement.
中文: 还特别设计了一个利用多个凹面反射镜来延长测量光程的光学系统，可提高系统的检测灵敏度。
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英文: By placing the reticule in the main optical path of the TV tracking lens, it can not only take the place of the auxiliary optical path in displaying line of sight, but also simplifies the structure of the lens.
中文: 将这种分化板置于电视跟踪镜头的主光路中，用以显示瞄准光标，可取代电视跟踪镜头的辅助光路，使镜头的结构得到简化。
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英文: Comparing with other improvement, this method is superior in simple optical path and no additional energy loss.
中文: 通过对光强不对称的改进，该方法有光路简单，无能量损失的优势。
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英文: In order to reduce the effect of line-structured laser source on the m easuring accuracy, a unidirectional expanding optical path for the nonlinear sou rce is presented, which can accomplish shaping and intensity correction of Gauss ian beam.
中文: 为了减小线结构光传感器光源对测量精度的影响，设计了一种集整形和能量校正为一体的非线性光源单向扩展光路。
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英文: With careful design, the camera can be positioned so that its optical path is close to that of the user's eye; the video image thus approximates what the user would normally see.
中文: 透过精细的设计使摄影机定位，让它的光径非常接近使用者眼睛的视线，因此能模拟使用者通常会看到的影像。
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