(EP960430-A1)      The electric converter includes a casing in which a heated cathode serves as a source of electrons, and an anode receives these electrons. The cathode is a wire grid having wires going in at least two directions transverse to each other.    A laser hits electrons between the cathode and anode to provide quantum interference to electrons just before reaching anode to lower their energy. A pair of charged focussing rings in the casing, between the cathode and the anode, direct electrons emitted by the cathode through the focussing rings on their way to the anode.    ADVANTAGE -   Uses of wire grid cathode provides larger surface area for electrons to boil off, and laser lowers energy levels of electrons such that they are more readily are captured by the anode, thus provides better conversion efficiency and reduced electron scatter.    (CN1244292-A)      The electric converter includes a casing in which a heated cathode serves as a source of electrons, and an anode receives these electrons. The cathode is a wire grid having wires going in at least two directions transverse to each other.    A laser hits electrons between the cathode and anode to provide quantum interference to electrons just before reaching anode to lower their energy. A pair of charged focussing rings in the casing, between the cathode and the anode, direct electrons emitted by the cathode through the focussing rings on their way to the anode.    ADVANTAGE -   Uses of wire grid cathode provides larger surface area for electrons to boil off, and laser lowers energy levels of electrons such that they are more readily are captured by the anode, thus provides better conversion efficiency and reduced electron scatter.    (JP2001509310-W)      The electric converter includes a casing in which a heated cathode serves as a source of electrons, and an anode receives these electrons. The cathode is a wire grid having wires going in at least two directions transverse to each other.    A laser hits electrons between the cathode and anode to provide quantum interference to electrons just before reaching anode to lower their energy. A pair of charged focussing rings in the casing, between the cathode and the anode, direct electrons emitted by the cathode through the focussing rings on their way to the anode.    ADVANTAGE -   Uses of wire grid cathode provides larger surface area for electrons to boil off, and laser lowers energy levels of electrons such that they are more readily are captured by the anode, thus provides better conversion efficiency and reduced electron scatter.