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objective grating
释义
objective grating
objective grating
See objective prism.
objective grating
[
äb′jek·tiv ′grād·iŋ
]
(optics)
A series of equally spaced parallel wires placed over the objective lens of a telescope; photographic magnitudes of stars are calculated from the relative brightnesses of images in the resulting diffraction pattern.
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up before
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up blast discharge
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更新时间:2026/6/15 21:46:40