In this OPU, we use a triplet lens to collimate the laser beam.

在该系统中，我们采用三片式准直镜来对光束进行准直。

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Select high-quality metallurgical powder forging, opu 18%, lubricity and wearability ideal combination.

精选高品质的粉末冶金锻造，含油率为18%，润滑性与耐磨性理想结合。

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This paper designs an optical system and some lenses for the BD OPU, including collimator lens, beam shaping lens for laser beam shaping, and cylinder lens for signal detecting.

本文设计了一套蓝光光学读取头的光路系统，包括用于光束处理的准直镜，整形棱镜，还有用于信号探测的柱面镜。

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