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1. Oxford Dictionary

   collimator

   • IPA[ˈkɒlɪmeɪtə]

   英式

   • n.
     a device for producing a parallel beam of rays or radiation.；a small fixed telescope used for adjusting the line of sight of an astronomical telescope.

   • noun: collimator, plural noun: collimators

2. • 更多解釋

   collimator

   • IPA[ˈkäləˌmādər]

   美式

   • n.
     a device for producing a parallel beam of rays or radiation.

   Oxford American Dictionary