Curved surfaces formed by etching and thermal processing

Details Curved surfaces formed by etching and thermal processing Curved surfaces formed by etching and thermal processing

1997-03-14

1998-09-15

Loney, Donald

Stock material or miscellaneous articles

Structurally defined web or sheet

Including variation in thickness

428120, 428213, 359570, 359573, 359575, 359741, 359743, B32B 300, G02B 518

Patent

active

058076220

ABSTRACT:
A smooth contoured structure is formed from a planar surface by etching mesas of equal height into the surface and heat treating the structure to mass transport material above the desired contour to fill in voids below the desired contour. In an alternate embodiment, an optical element is formed using a patterned layer of sacrificial material and thermally treating the sacrificial layer to form a precursor contour line. The line is then transformed onto a substrate and smoothed to form the optical element.

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