Abstract: A discharge circuit for pulsed laser comprising a power source, main discharge electrodes for generating a laser beam, a main discharge capacitor charged with electrical charges for generating the main discharge between the main discharge electrodes, and a switching circuit for performing switching operations to charge the main discharge capacitor with electrical charges supplied from the power source in a prescribed repetition cycle, is provided, in parallel to the main discharge capacitors, with a circuit element for consuming or grounding the reverse current from the power source caused by overshoot generated directly after the main discharge, thereby attaining stable laser output without ill effects from overshoot voltage generated directly following discharge.

Abstract: A discharge circuit for pulsed laser comprising a power source, main discharge electrodes for generating a laser beam, a main discharge capacitor charged with electrical charges for generating the main discharge between the main discharge electrodes, and a switching circuit for performing switching operations to charge the main discharge capacitor with electrical charges supplied from the power source in a prescribed repetition cycle, is provided, in parallel to the main discharge capacitors, with a circuit element for consuming or grounding the reverse current from the power source caused by overshoot generated directly after the main discharge, thereby attaining stable laser output without ill effects from overshoot voltage generated directly following discharge.

Abstract: Hydrophilic fine gel particles, said particles being crosslinked polymer particles comprising 20-94.8% by weight of a monoethylenically unsaturated amide monomer, 5-60.0% by weight of a crosslinkable ethylenically unsaturated monomer, 0.1-30% by weight of an ethylenically unsaturated carboxylic acid, 0.1-50% by weight of an ester monomer of an acrylic or methacrylic acid, and 0-30% by weight of a monomer copolymerizable with the above-mentioned monomers, said particles having a particle diameter in a water-swollen state of 0.1-10 .mu.m and a weight-average particle diameter/number-average particle diameter ratio of 1.2 or less; and a process for producing hydrophilic fine gel particles having a particle diameter in a water-swollen state of 0.1-10 .mu.m and a weight-average particle diameter/number-average particle diameter ratio of 1.2 or less, which comprises copolymerizing a monomer mixture of 20-94.8% by weight of a monoethylenically unsaturated amide monomer, 5-60.

Abstract: Hydrophilic fine gel particles, said particles being crosslinked polymer particles comprising 20-94.8% by weight of a monoethylenically unsaturated amide monomer, 5-60.0% by weight of a crosslinkable ethylenically unsaturated monomer, 0.1-30% by weight of an ethylenically unsaturated carboxylic acid, 0.1-50% by weight of an ester monomer of an acrylic or methacrylic acid, and 0-30% by weight of a monomer copolymerizable with the above-mentioned monomers, said particles having a particle diameter in a water-swollen state of 0.1-10 .mu.m and a weight-average particle diameter/number-average particle diameter ratio of 1.2 or less; and a process for producing hydrophilic fine gel particles having a particle diameter in a water-swollen state of 0.1-10 .mu.m and a weight-average particle diameter/number-average particle diameter ratio of 1.2 or less, which comprises copolymerizing a monomer mixture of 20-94.8% by weight of a monoethylenically unsaturated amide monomer, 5-60.