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Antireflection
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D20X3Spectrograph
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D20X3Spectrograph
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Concave convex lens
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Concave convex lens
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Octahedral prism
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Octahedral prism
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Window piece
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Window piece
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Window piece
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Punch window
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Punch window
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gold-plated
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gold-plated
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plate with silver
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plate with silver
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plate with silver
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High reflection spectroscopy
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High reflection spectroscopy
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High reflection spectroscopy
