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Patent Searching and Data


Title:
TELESCOPE MIRROR FOR HIGH BANDWIDTH FREE SPACE OPTICAL DATA TRANSMISSION
Document Type and Number:
WIPO Patent Application WO2001084747
Kind Code:
A3
Abstract:
Optical mirror elements for high bandwidth free space optical communication are produced by an electroforming replication technique. Onto the precision surface of a mandrel that is a negative of the required optical surface a layer of metal is deposited forming an exact copy of the mandrel surface and is then separated to form the required optical element. During the production process the mandrel may be coated with a variety of materials that are then separated together with the electroformed optical element during the release step to form a monolithic structure that includes a reflective coating. The mandrel remains unchanged by the process and can then be re-used. The high cost of conventional polishing techniques is therefore limited to the production of the mandrel. The replication process results in the production of low cost optical elements suitable for high bandwidth free space optical data transmission.

Inventors:
VALENZUELA ARNOLD (DE)
VALSECCHI GIUSEPPE (IT)
BANHAM ROBERT DAVID (GB)
MARIONI FABIO (IT)
Application Number:
PCT/EP2001/005024
Publication Date:
May 15, 2003
Filing Date:
May 03, 2001
Export Citation:
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Assignee:
MEDIA LARIO SRL (IT)
VALENZUELA ARNOLD (DE)
VALSECCHI GIUSEPPE (IT)
BANHAM ROBERT DAVID (GB)
MARIONI FABIO (IT)
International Classes:
C25D1/06; G02B5/10; G02B23/02; H04B10/112; (IPC1-7): H04B10/10; G02B5/10
Foreign References:
US3378469A1968-04-16
US3905778A1975-09-16
US3428533A1969-02-18
US4484798A1984-11-27
US4740276A1988-04-26
EP0977070A12000-02-02
EP0963063A21999-12-08
EP0398596A21990-11-22
Other References:
P.F. SZAJOWSKI ET AL: "Key Elements of High-Speed WDM Terrestrial Free-Space Optical Communications Systems", PROC. OF SPIE, vol. 3932, 24 January 2000 (2000-01-24), pages 2 - 14, XP000961446
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