US 6,204,470 B1 · Laser processing apparatus

Abstract

A laser processing apparatus in which a laser beam oscillatory output from a laser oscillation unit is transmitted through an optical fiber to a remote laser processing site, where the laser processing apparatus has an optical fiber setting apparatus for finding a supply power upper limit for the type of fiber (including a step index (SI) fiber and a graded index (GI) fiber) used and the diameter of the optical fiber, and a laser power supply unit for supplying the laser oscillation unit with an electric power for laser oscillation. A supply power mean value arithmetic apparatus detects the electric power supplied to the laser oscillation unit to figure out a supply power mean value at a certain interval, and the laser power supply unit is interrupted when the supply power mean value exceeds the supply power upper limit.

Claims18

Dependent claims

A laser processing apparatus in which a laser beam oscillatorily output from a laser oscillation unit is transmitted through an optical fiber to a remote laser processing site, said laser processing apparatus comprising:

optical fiber setting means for setting the type and diameter of said optical fiber;
laser output upper limit finding means for finding a laser output upper limit of said laser beam depending on the type and diameter of said optical fiber which have been set by said optical fiber setting means;
laser output setting means for setting a laser output of said laser beam;
and
judgment means for comparing said laser output value which has been set by said laser output setting means with said laser output upper limit which has been found by said laser output upper limit finding means, to judge whether said laser output set value exceeds said laser output upper limit.

2 more elements

Dependencies are inferred from the claim text.

Laser processing apparatus

Life of this patent

Laser processing apparatus

Life of this patent

Abstract

Claims18