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The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.

The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.

Patent No.:

US 10005152 B1

PDFFull Text
Date of Patent:
Jun. 26, 2018

Filed:

Nov. 19, 2014

Method and apparatus for spiral cutting a glass tube using filamentation by burst ultrafast laser pulses

Applicant:

Rofin-sinar Technologies Inc., Plymouth, MI (US);

Inventor:

S. Abbas Hosseini, Orlando, FL (US);

Assignee:

ROFIN-SINAR TECHNOLOGIES LLC, Plymouth, MI (US);

Attorney:

Woodling, Krost and Rust

Primary Examiner:

Jason L Lazorcik

Int. Cl.
CPC ...
C03B 33/095 (2006.01); B23K 26/00 (2014.01); C03B 33/02 (2006.01); C03B 33/06 (2006.01); B23K 26/06 (2014.01); B23K 26/402 (2014.01); B23K 26/0622 (2014.01); B23K 26/382 (2014.01); B23K 103/00 (2006.01);
U.S. Cl.
CPC ...
B23K 26/0057 (2013.01); B23K 26/0617 (2013.01); B23K 26/0622 (2015.10); B23K 26/0665 (2013.01); B23K 26/382 (2015.10); B23K 26/402 (2013.01); C03B 33/0222 (2013.01); C03B 33/06 (2013.01); B23K 2203/50 (2015.10); B23K 2203/52 (2015.10); Y10T 428/131 (2015.01); Y10T 428/15 (2015.01); Y10T 428/21 (2015.01); Y10T 428/218 (2015.01);
Abstract

A method of producing a spiral cut transparent tube using laser machining includes using an ultrafast laser beam comprising a burst of laser pulses and focusing the laser beam on the transparent tube to enable relative movement between the laser beam and the transparent tube by moving the laser beam, the glass tube or both the laser beam and the glass tube. A beam waist is formed external to the surface of the transparent tube wherein the laser pulses and sufficient energy density is maintained within the transparent tube to form a continuous laser filament therethrough without causing optical breakdown. The method and delivery system makes a spiral cut in the transparent tube.

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