Patent · US Active

Moulding tool for moulding a ceramic green body and use of said moulding tool

US8019461B2 · kind B2 · utility

1Cited by

1References

19Claims

0Family size

Assignee

Schott AG · DE

Inventors

Yvonne Menke · Mainz, DE
Ulrich Peuchert · Bodenheim, DE
Yoshio Okano · Seto, JP
Steffen Reichel · Mehlingen, DE

Key dates

Filing date	Jan 3, 2008
Grant date	Sep 13, 2011
Priority date	—
Expiry date	Sep 26, 2029

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10S425/808
WIPO fieldOther special machines
WIPO sectorMechanical engineering

Abstract

The moulding tool is a near-net-shape negative mould for shaping a ceramic green body for the lens. The mould has a shaping surface, which is described by the following equation B:y1 gives a position on an optical axis; x designates a perpendicular distance from the optical axis to the surface; k, c, and a1, a2, a3, a4, . . . are constants describing a surface of the lens to be moulded and z=|x|+b, wherein b is a constant with a value greater than 0 and less than 0.3 mm, which is a measure of a deviation of the shaping surface from the surface of the lens.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.