Process for producing a linearly-miniaturized densified optical article using a mold having an internal volume which is a homothetic copy of the optical article
US6374637B1 · kind B1 · utility
4Cited by
4References
16Claims
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Key dates
| Filing date | Aug 30, 2000 |
| Grant date | Apr 23, 2002 |
| Priority date | — |
| Expiry date | Aug 30, 2020 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC03B2201/42
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A process for producing a linearly-miniaturized, densified optical product, which entails a) cold filling a mould with a liquid colloidal dispersion formed from a chemical precursor; b) polycondensing the liquid colloidal dispersion to obtain a gel; c) supercritically drying the gel to form an amorphous aerogel having dimensions corresponding to the mould; and d) isotropically miniaturizing the amorphous monolithic aerogel obtained.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.