Laser device for medical treatment system

• US 6,908,461 B2
• Filed: 12/02/2003
• Issued: 06/21/2005
• Est. Priority Date: 12/27/2002
• Status: Expired due to Fees

• Current Assignee: Kabushiki Kaisha Topcon
• Original Assignee: Kabushiki Kaisha Topcon
• Inventors: Goto, Yoshiaki, Momiuchi, Masayuki, Eno, Taizo, Sagehashi, Hideo
• Primary Examiner(s): FARAH, AHMED M
• Application Number:
  US10/725,757
• Publication Number:
  US 20040133191A1
• Time in Patent Office: 567 Days
• Field of Search: 606/2, 606/10, 606 16- 18, 398 43- 51, 398 82- 88, 398 91- 95, 398/101, 219/121.6, 21912174-12176, 359/33, 430/945
• US Class Current: 606/10
• CPC Class Codes: A61B 18/20 using laser
• CPC Class Codes: A61B 2018/2075 mixing three wavelengths

Abstract

A laser device for medical treatment system, comprising at least a plurality of laser beam emitting sources, a laser beam multiplexing means for superimposing the laser beams emitted from the laser beam emitting sources, and a beam mixing means where the laser beams from the laser beam multiplexing means enter.

Claims

1. A laser device for medical treatment system, comprising at least a plurality of laser beam emitting sources, a laser beam multiplexing means for superimposing the laser beams emitted from said laser beam emitting sources, and a beam mixing means where the laser beams from said laser beam multiplexing means enter and which is an optical fiber for reflecting the laser beams by multireflection inside said optical fiber, and a condenser lens for focusing and entering the laser beams from said beam mixing means to a second optical fiber for propagation wherein said beam mixing means emits the laser beams so that the laser beam emitted from said laser device has a relation of 10≦

M²≦

22, where W·

Θ

=M²λ

/π

, M is a parameter to express the quality of the laser beam W is a beam waste, Θ

is a spreading angle, and λ

is a wavelength of the laser beam.

2. A laser device for medical treatment system according to claim 1, wherein said beam mixing means is an optical waveguide.

3. A laser device for medical treatment system according to claim 1, wherein said beam multiplexing means has a plurality of optical fibers where the laser beams enter individually, and said optical fibers have output ends integrated by being welded and deposited.

4. A laser device for medical treatment system according to claim 1, wherein the laser beam propagated in said optical fiber for propagation has the relation of 10≦

M²≦

22.

5. A laser device for medical treatment system according to claim 1, wherein K1 ≦

K2, wherein K1 is a product of the numerical aperture NA1 of said beam mixing means and a core diameter D1, and K2 is a product of numerical aperture NA2 of said optical fiber for propagation and a core diameter D2.

6. A laser device for medical treatment system according to claim 1, wherein said beam mixing means is an optical fiber designed in the form of a coil.