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collimating 準直 准直 Collimate \Col"li*mate\, v. t. [imp. & p. p. {Collimated}; p. p.
& vb. n. {Collimating}.] [See {Collimation}.] (Physics & Astron.) To render parallel to a certain line or direction; to bring into the same line, as the axes of telescopes, etc.; to render parallel, as rays of light. [1913 Webster] {Collimating eyepiece}, an eyepiece with a diagonal reflector for illumination, used to determine the error of collimation in a transit instrument by observing the image of a cross wire reflected from mercury, and comparing its position in the field with that of the same wire seen directly. {Collimating lens} (Optics), a lens used for producing parallel rays of light. [1913 Webster]
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