Laser device for drilling holes in components of a fluid injection device
AssigneeLasag AG
InventorsUlrich Dürr, Bruno Frei
Life of this patent
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Abstract
The laser machining device is provided for drilling holes in components of a fluid injection device, particularly for injecting fuel into a combustion engine. The laser resonator is formed by an optically pumped diode laser solid state active medium. The resonator is arranged for supplying primary pulses in the microsecond range. Modulation means are arranged between the resonator and a machining head for modulating the amplitude of the primary pulses supplied by the resonator, so as to obtain a secondary pulse train of smaller length for each of said pulses.
Claims18
A laser machining device for drilling holes in fluid injection device components, particularly for injecting fuel into a combustion engine, said machining device comprising:
- (a) a laser resonator formed of a first solid state active medium and first optical pumping means, wherein said first optical pumping means is formed by laser diodes and said resonator generates, without a Q switch, primary pulses having a length within or greater than the microsecond range;
- and
- (b) modulation means arranged between said resonator and a machining head, wherein said modulation means receives primary pulses from said resonator and operates to output a train of secondary pulses for each primary pulse entering therein from said resonator, and each secondary pulse has a shorter length than the corresponding primary pulse.
A laser machining device for drilling holes in fluid injection device components, particularly for injecting fuel into a combustion engine, said machining device comprising:
- (a) a laser resonator formed of a first solid state active medium and first optical pumping means, wherein said first optical pumping means is formed by laser diodes and said resonator generates, without a Q switch, primary pulses having a length within or greater than the microsecond range;
- (b) modulation means arranged between said resonator and a machining head, wherein said modulation means receives primary pulses from said resonator and operates to output a train of secondary pulses for each primary pulse entering therein from said resonator, and each secondary pulse has a shorter length than the corresponding primary pulse;
- and
- (c) means for amplifying the pulses supplied by said resonator, wherein said amplification means are controlled so that amplification pulses are provided with a time lag relative to the primary pulses so that the amplitude of said secondary pulses is modulated, and wherein said amplification means include several active mediums defining several amplification levels, wherein each of said active mediums is pumped by a flash lamp, wherein said first active medium is formed by a Nd:YVO4 crystal that directly generates a linearly polarized light.
Dependencies are inferred from the claim text.