| 摘要 |
A metal plate ( 126 ) has a plurality of openings ( 127 ) extending through it, and is cleaned using a wet hydrogen process ( 157 ). Glass windows ( 106 ) are then placed in the openings, and are each fused to the metal plate by heat ( 231 ) in a manner so that each window projects outwardly on each side of the plate. Both sides of each window are then simultaneously ground and polished ( 232 ). Exposed surfaces of the metal plate are electroplated with nickel and gold ( 236 ). One or more coatings ( 41, 46, 47 ) are applied to one or both sides of each window. Several sections are then cut from the assembly, each of which can serve as a lid ( 17 ) for an optical apparatus ( 10 ).
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