US 12,419,685 B2
Multi-wavelength laser device for photocoagulation surgery
Yung-Fu Chen, Hsinchu (TW); Hsing-Chih Liang, Hsinchu (TW); and Chia-Han Tsou, Hsinchu (TW)
Assigned to National Yang Ming Chiao Tung University, Hsinchu (TW)
Filed by National Yang Ming Chiao Tung University, Hsinchu (TW)
Filed on Feb. 9, 2023, as Appl. No. 18/107,993.
Prior Publication US 2024/0108409 A1, Apr. 4, 2024
Int. Cl. A61B 18/22 (2006.01); A61B 18/00 (2006.01); A61B 18/20 (2006.01)
CPC A61B 18/22 (2013.01) [A61B 2018/00589 (2013.01); A61B 2018/2065 (2013.01); A61B 2018/208 (2013.01); A61B 2018/2272 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A laser device for photocoagulation surgery, wherein the laser device includes a multi-wavelength laser source having a first direction and a second direction different from the first direction, comprising:
a positioning light source configured to project a positioning visible light along the first direction, wherein the positioning visible light has a specific wavelength being about 635 nm;
a first laser light source configured to project a first laser light having a first wavelength along the second direction;
a first lens disposed in a main optical path of the positioning visible light, and configured to receive the first laser light and reflect the first laser light along the first direction;
a second laser light source configured to project a second laser light having a second wavelength along the second direction;
a second lens disposed in the main optical path, and configured to receive the second laser light and reflect the second laser light along the first direction;
a third laser light source configured to project a third laser light having a third wavelength along the second direction;
a third lens disposed in the main optical path, and configured to receive the third laser light and reflect the third laser light along the first direction;
a fourth laser light source configured to project a fourth laser light having a fourth wavelength along the second direction; and
a fourth lens disposed in the main optical path, and configured to receive the fourth laser light and reflect the fourth laser light along the first direction, wherein:
the first wavelength is longer than the second wavelength, the second wavelength is longer than the specific wavelength, the specific wavelength is longer than the third wavelength, the third wavelength is larger than the fourth wavelength, and each of the first, the second, the third and the fourth wavelengths is within a visible light waveband;
the first lens has a first high transmittance for a first waveband including any wavelength shorter than the first wavelength;
the second lens has a second high transmittance for a second waveband including any wavelength shorter than the second wavelength;
the third lens has a third high transmittance for a third waveband including any wavelength longer than the third wavelength;
the fourth lens has a fourth high transmittance for a fourth waveband including any wavelength longer than the fourth wavelength;
the first lens is disposed near the second lens, and is placed downstream of the second lens in the main optical path; and
the third lens is disposed near the fourth lens, and is placed upstream of the fourth lens in the main optical path.