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aperture stop |
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aperture stop [′ap·ə‚chər ‚stäp] (optics) That opening in an optical system that determines the size of the bundle of rays which traverse the system from a given point of the object to the corresponding point of the image. How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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The lenses are an aperture stop, reducing stray light in the spectrograph. |
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