METHOD AND APPARATUS FOR MAKING A LID WITH AN OPTICALLY TRANSMISSIVE WINDOW

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.