Abstract: A plasma monitoring device includes a fixing unit, a plasma measuring unit disposed to be in contact with the fixing unit, and measuring a luminous intensity of emitted light of a plasma to output a luminous intensity measurement value, a reference light source unit irradiating reference light having a uniform luminous intensity to the plasma measuring unit, and a control unit receiving the luminous intensity measurement value to calculate a luminous intensity value of the emitted light, controlling a voltage applied to the reference light source unit to uniformly control a luminous intensity of the reference light, comparing a luminous intensity of the reference light irradiated to the plasma measuring unit with a previously stored luminous intensity reference value to detect a correction factor, and applying the correction factor to a luminous intensity value of the emitted light to correct the luminous intensity measurement value.

Abstract: A plasma monitoring device includes a fixing unit, a plasma measuring unit disposed to be in contact with the fixing unit, and measuring a luminous intensity of emitted light of a plasma to output a luminous intensity measurement value, a reference light source unit irradiating reference light having a uniform luminous intensity to the plasma measuring unit, and a control unit receiving the luminous intensity measurement value to calculate a luminous intensity value of the emitted light, controlling a voltage applied to the reference light source unit to uniformly control a luminous intensity of the reference light, comparing a luminous intensity of the reference light irradiated to the plasma measuring unit with a previously stored luminous intensity reference value to detect a correction factor, and applying the correction factor to a luminous intensity value of the emitted light to correct the luminous intensity measurement value.

Abstract: Provided is a liquefied gas transfer device for reducing boil-off gas. The liquefied gas transfer device for reducing boil-off gas comprises: at least one transfer pipe formed in a vertical direction inside a quay for storing liquefied gas so as to transfer the liquefied gas; a branch pipe which is branched from a lower part of the transfer pipe to one side of the transfer pipe, and which has an end part opened toward a bottom surface of the quay; a valve which is connected to the branch pipe and/or the transfer pipe, and which opens and closes the branch pipe or the transfer pipe so as to move the liquefied gas from the transfer pipe to the branch pipe; and a resistance member disposed inside the branch pipe so as to interrupt the flow of the liquefied gas.

Abstract: Provided is a liquefied gas transfer device for reducing boil-off gas. The liquefied gas transfer device for reducing boil-off gas comprises: at least one transfer pipe formed in a vertical direction inside a quay for storing liquefied gas so as to transfer the liquefied gas; a branch pipe which is branched from a lower part of the transfer pipe to one side of the transfer pipe, and which has an end part opened toward a bottom surface of the quay; a valve which is connected to the branch pipe and/or the transfer pipe, and which opens and closes the branch pipe or the transfer pipe so as to move the liquefied gas from the transfer pipe to the branch pipe; and a resistance member disposed inside the branch pipe so as to interrupt the flow of the liquefied gas.

Abstract: An electron gun for a color cathode ray tube includes a cathode which is a source for emitting an electron beam, a control electrode, through which the electron beam emitted from the cathode passes, having first electron beam passing holes each including a first vertically elongated indented portion formed at an output side surface of the control electrode and a first electron beam passing hole portion formed in the first indented portion, a screen electrode installed adjacent to the control electrode and having second electron beam passing holes formed in the screen electrode, a plurality of focusing electrodes for forming a plurality of quadrupole lenses, sequentially installed from the screen electrode and respectively having electron beam passing holes having a predetermined shape.

Abstract: An electron gun for a cathode ray tube includes at least one auxiliary quadruple lens forming unit adapted to control an electron beam diverging in the vertical direction and focused in the horizontal direction by a plurality of focus electrodes, at least one first quadruple lens forming unit adapted to control the electron beam passing through the auxiliary quadruple lens focused in the vertical direction and diverging in the horizontal direction, and at least one second quadruple forming unit adapted to control the electron beam passing through the first quadruple lens diverging in the vertical direction and focused in the horizontal direction, installed between the screen electrode of a triode portion and a final acceleration electrode of the cathode ray tube and sequentially arranged in a direction from a screen electrode to a screen of the cathode ray tube.

Abstract: An electrode assembly includes at least first and second electrodes for forming one or more dynamic quadrupole lenses to emit electron beams and an electron gun using the same. A first parabolic waveform signal having voltages decreasing from the center to the periphery of a screen on which the electron beams land is applied to the first electrode, and a second parabolic waveform signal having voltages increasing from the center to the periphery of the screen is applied to the second electrode, in synchronization with horizontal and vertical deflection signals for horizontally and vertically deflecting electron beams emitted from the electrode assembly.

Abstract: An electron gun for a color cathode ray tube (CRT) includes at least one auxiliary quadruple lens forming unit for making an electron beam diverging in the vertical direction and focused in the horizontal direction by a plurality of focus electrodes, at least one first quadruple lens forming unit for making the electron beam passing through the auxiliary quadruple lens focused in the vertical direction and diverging in the horizontal direction, and at least one second quadruple forming unit for making the electron beam passing through the first quadruple lens diverging in the vertical direction and focused in the horizontal direction, installed between the screen electrode of a triode portion and a final acceleration electrode, which are sequentially arranged in a direction from a screen electrode to a fluorescent film of a cathode ray tube. Thus, a horizontal resolution at the periphery of a screen is improved.

Abstract: A dynamic focus electron gun for a color cathode ray tube including a cathode, a control electrode and a screen electrode, which constitute a triode, a first focusing electrode having three vertically elongated electron beam through-holes formed through its emitting surface, a second focusing electrode which constitutes a quadrupole lens together with the first focusing electrode and having three circular electron beam through-holes formed through its entering surface facing the emitting surface of the first focusing electrode, and a final accelerating electrode installed adjacent to the second focusing electrode and constituting a main electronic lens together with the second focusing electrode.

Abstract: An electron gun for a color cathode ray tube includes a cathode which is a source for emitting an electron beam, a control electrode, through which the electron beam emitted from the cathode passes, having first electron beam passing holes each including a first vertically elongated indented portion formed at an output side surface of the control electrode and a first electron beam passing hole portion formed in the first indented portion, a screen electrode installed adjacent to the control electrode and having second electron beam passing holes formed in the screen electrode, a plurality of focusing electrodes for forming a plurality of quadrupole lenses, sequentially installed from the screen electrode and respectively having electron beam passing holes having a predetermined shape.

Abstract: An electrode assembly includes at least first and second electrodes for forming one or more dynamic quadrupole lenses to emit electron beams and an electron gun using the same. A first parabolic waveform signal having voltages decreasing from the center to the periphery of a screen on which the electron beams land is applied to the first electrode, and a second parabolic waveform signal having voltages increasing from the center to the periphery of the screen is applied to the second electrode, in synchronization with horizontal and vertical deflection signals for horizontally and vertically deflecting electron beams emitted from the electrode assembly.

Abstract: An electron gun for a cathode ray tube includes a triode composed of a cathode, a controlling electrode, and a screen electrode. A pre-focusing electrode is provided and supplied with a first voltage for pre-focusing electron beams emitted from the triode. A first auxiliary electrode is provided and supplied with a second voltage which is also supplied to the screen electrode. A second auxiliary electrode is provided and supplied with a third voltage which is also applied to the controlling electrode. The applied voltages create divergent lenses between the focusing electrode and the first auxiliary electrode and between the first and second auxiliary electrode. A main focusing electrode is provided and supplied with the first voltage like the pre-focusing electrode. A converging lens is formed between the second auxiliary electrode and the main lens. A final accelerating electrode is installed adjacent to the main focusing electrode and supplied with a fourth voltage.

Abstract: In a dynamic focus electron gun, a horizontal dynamic focus voltage is varied according to those portions of a screen where the electron beam arrives and is applied so that the peak-to-peak amplitude of the horizontal dynamic focus voltage in one horizontal deflection period for the upper and lower portions of the screen is greater than that for the screen's center, thereby accomplishing uniform beam spots throughout the screen.