US 11,999,647 B2
Glass optical waveguide with variable cross section
Jan Philipp Steigleder, Budenheim (DE); Bernd Schultheis, Schwabenheim (DE); Martin Cramer, Wiesbaden (DE); Christian Schwedler, Mainz (DE); Hubertus Russert, Jugenheim (DE); Bernhard Hunzinger, Wackernheim (DE); and Holger Werner, Frankfurt am Main (DE)
Assigned to SCHOTT AG, Mainz (DE)
Filed by SCHOTT AG, Mainz (DE)
Filed on Aug. 27, 2021, as Appl. No. 17/460,091.
Application 17/460,091 is a continuation of application No. PCT/EP2020/054894, filed on Feb. 25, 2020.
Claims priority of application No. 10 2019 105 183.5 (DE), filed on Feb. 28, 2019.
Prior Publication US 2021/0403366 A1, Dec. 30, 2021
Int. Cl. G02B 6/00 (2006.01); C03B 23/047 (2006.01); C03B 37/02 (2006.01); C03B 37/03 (2006.01); C03B 37/15 (2006.01); F21V 8/00 (2006.01)
CPC C03B 37/032 (2013.01) [C03B 23/047 (2013.01); C03B 37/02 (2013.01); C03B 37/15 (2013.01); G02B 6/0046 (2013.01); G02B 6/0058 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A drawn glass element for producing glass optical waveguides, comprising:
two first length portions with a first cross-sectional area and which define the two ends of the glass element;
an intermediate length portion between the two first length portions, which has a second cross-sectional area smaller than the first cross-sectional area;
a first transition portion between the intermediate length portion and one of the first length portions; and
a second transition portion between the intermediate length portion and another of the first length portions, wherein the first and second transition portions have a cross-sectional area that steadily changes and merges from the first cross-sectional area into the second cross-sectional area,
wherein the first and second transition portions have a central third, wherein the central third has a cross section (A) that increases more slowly than a function

OG Complex Work Unit Math
wherein l is a length coordinate in mm, A1 is a first second cross-sectional area in mm2, A2 is a second cross-sectional area mm2, lu is a length of the first and second transition portions in mm, and l0 is a length coordinate of a midpoint of the first and second transition portion in mm.