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The Instrument - the SOHO home page

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Construction of a typical filter<br />

Construction of a typical filter<br />

• Glass plates: no role. Mechanical support for <strong>the</strong> filter.<br />

• Surface of one plate coated with:<br />

- a thin evaporated film of high reflectivity,<br />

- a thin layer of a transparent dielectric, and<br />

- ano<strong>the</strong>r metal film.<br />

•<strong>The</strong> o<strong>the</strong>r plate is added for protection.

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