US 12,456,848 B2
Fractional handpiece with a passively Q-switched laser assembly
Xiaoming Shang, Lexington, MA (US); Hui Liu, Boston, MA (US); Craig Langlois, Clinton, MA (US); and Kevin Schomacker, Maynard, MA (US)
Assigned to Candela Corporation, Marlborough, MA (US)
Filed by Candela Corporation, Marlborough, MA (US)
Filed on Sep. 22, 2022, as Appl. No. 17/950,186.
Application 17/950,186 is a continuation in part of application No. 16/884,708, filed on May 27, 2020, granted, now 11,532,919.
Prior Publication US 2023/0048178 A1, Feb. 16, 2023
Int. Cl. H01S 3/113 (2006.01); A61B 17/00 (2006.01); A61N 5/067 (2006.01); H01S 3/115 (2006.01); A61N 5/06 (2006.01)
CPC H01S 3/115 (2013.01) [A61N 5/067 (2021.08); A61N 2005/0644 (2013.01)] 26 Claims
OG exemplary drawing
 
1. A fractional handpiece for skin treatment comprising:
a handpiece body comprising:
a passively Q-switched laser assembly within the handpiece body operatively connected to a pump laser source to receive a pump laser beam having a first wavelength, the passively Q-switched laser assembly comprising one or more pump lenses and a laser cavity comprising one or more external mirrors;
a beam splitting assembly operable to split a solid beam emitted by the passively Q-switched laser assembly and form an array of micro-beams across a segment of skin; and
a positional sensor operable to guide movement of the fractional handpiece and to synchronize with laser pulsing,
wherein the passively Q-switched laser assembly generates a high power sub-nanosecond pulsed laser beam having a second wavelength.