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US 4,871,250 AGranted
Beam monitor for a high-output laser
AssigneeAmada Engineering & Service Co., Inc.
InventorRyoji Koseki
Life of this patent
Estimating the term…
Abstract
A beam monitor for a high-output laser has a beam intensity detection means which detects localized beam intensity in the cross section of a high intensity laser beam, and a characteristic calculation means for calculating the beam characteristics of a laser beam based on the localized beam intensity detected by the beam intensity detection means.
Claims12
A gas laser system provided with lasing condition adjusting means comprising:
- an output mirror;
- a rear mirror having a predetermined transmittance positioned opposite said output mirror;
- an optical cavity defined by said output mirror and said rear mirror;
- a pair of discharge electrodes for generating a discharge within a gas supplied to the cavity;
- a pulse generating unit for applying a pulse voltage between said pair of electrodes;
- means for adjusting the orientations of said output mirror and said rear mirror;
- a matrix sensor means comprising a plurality of resistance temperature elements located behind said rear mirror for receiving a laser beam passing through said rear mirror;
- a display means for visually indicating an instant mode resonance pattern taking place in said optical cavity on the basis of the output of said matrix sensor means;
- a control panel means for manually inputting a correction value of the orientation of said mirrors with reference to said mode pattern displayed;
- a processor means for controlling said orientation adjustment means in accordance with said correction value;
- means for calculating output power based upon the ouptut of said matrix means;
- and
- means for controlling the pulse generating unit in accordance with said output power, so that the discharge current is adjusted to the optimum corresponding to an instantaneous output power.
10 more elements
A gas laser system provided with lasing condition adjusting means comprising:
- an output mirror;
- a rear mirror having a predetermined transmittance positioned opposite said output mirror;
- an optical cavity defined by said output mirror and said rear mirror;
- a pair of discharge electrodes for generating a discharge within a gas supplied to the cavity;
- a pulse generating unit for applying a pulse voltage between said pair of electrodes;
- means for adjusting the orientations of said output mirror and said rear mirror;
- a matrix sensor means comprising a plurality of thermocouples located behind said rear mirror for receiving a laser beam passing through said rear mirror;
- a display means for visually indicating an instant mode resonance pattern taking place in said optical cavity on the basis of the output of said matrix sensor means;
- a control panel means for manually inputting a correction value of the orientation of said mirrors with reference to said mode pattern displayed;
- a processor means for controlling said orientation adjusting means in accordance with said correction value;
- means for calculating output power based upon the ouptut of said matrix means;
- and
- means for controlling the pulse generating unit in accordance with said output power, so that the discharge current is adjusted to the optimum corresponding to an instantaneous output power.
10 more elements
Dependencies are inferred from the claim text.