System and method for providing a hermetically sealed lens...

Optical: systems and elements – Lens – With support

Reexamination Certificate

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C359S811000, C359S819000

Reexamination Certificate

active

06992844

ABSTRACT:
A system and method of forming a hermetic seal between a lens or window and a lid, which minimizes bending moments, and therefore, bifringance on the window or lens is disclosed. This is accomplished by use of a transition member, specific geometries, and selection of the coefficient of thermal expansion of the materials to insure that the solder joint is in compression on cool down and solder strains are maintained within acceptable limits. The transition member may be soldered or welded to lid or integral through machining.

REFERENCES:
patent: 6404939 (2002-06-01), Wada
patent: 6657798 (2003-12-01), Kabelevs et al.

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