Patent · US Active

Glass tube element with improved quality

US11614181B2 · kind B2 · utility

0Cited by

0References

21Claims

0Family size

Assignee

Schott AG · DE

Inventors

Volker Trinks · Mitterteich, DE
André Witzmann · Waldershof, DE

Key dates

Filing date	Apr 2, 2021
Grant date	Mar 28, 2023
Priority date	—
Expiry date	Sep 21, 2041

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC03B35/04
WIPO fieldOther special machines
WIPO sectorMechanical engineering

Abstract

A glass tube element having hollow cylindrical section that has a shell enclosing a lumen and extends along a main extension and an optical delay of a light ray. The shell has a surface facing away from the lumen. The optical delay has values that all fall within a range having a size of between 3 and 30 nm. The optical delay being an optical measurement of the glass tube element by the light ray extending along a measurement path in a direction of perpendicular to the main extension and tangent to a surface of the shell. The measurement path touches the surface for different measurements at different positions each having a different azimuth angle within a cylindrical coordinate system fixedly attached to the glass tube element and having an origin on a center axis of the glass tube element.

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