亚洲国产无套无码AV电影,国产乡下三级全黄三级bd,久久国产精久久精产国,古装激情偷乱人伦视频

Single-mode fiber collimator is packaged by precise positioning of fiber pigtail and focusing lens, which can transform the output light of fiber into parallel light beam (Gaussian beam) or couple external parallel light into the fiber. It can also be used alone to achieve the required spot size at a specific position according to the predetermined divergence angle.                                                                                                                               According to the working distance, it can be divided into fixed working distance (fixed focus) collimator and variable collimator for working distance range. Conventional lenses or Grin lenses should be selected according to different working distances. We recommend installing the collimator in an optical precision adjustment frame for adjustment to ensure the best coupling efficiency.                                                                                                     This product requires a minimum order of 10 pieces. For bulk order prices, please contact customer service.