collimators 

  1. 名詞
瞄準儀, 準直管
平行光管

    
                        
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例句

                

                    
    
                                                    
  1. 
                                Two small collimators were mounted in the same room on iron pillars, north and south of the circle.                            
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  2. 
                                Optical plummets or collimators are required to ensure that the theodolites and targets are centered over the marks.                            
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  3. 
                                They act as collimators and reduce considerably the amount of straylight in the field of view of the focal plane cameras.                            
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  4. 
                                The collimators were often permanently mounted in these positions, with their objectives and eyepieces fixed to separate piers.                            
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  5. 
                                Although some monochromator designs do use focusing gratings that do not need separate collimators , most use collimating mirrors.                            
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