Cleaning apparatus for optical window, engine, and method for cleaning optical window of engine
AssigneeNational Institute of Advanced Industrial Science and Technology
InventorsEiichi TAKAHASHI, Takehiko SEGAWA
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Abstract
An apparatus for cleaning a surface of an optical window includes a first electrode that is provided inside the optical window and is covered with a dielectric material forming the optical window. A second electrode is provided around the optical window and is exposed on at least one surface of the optical window. A power supply is electrically coupled between the first electrode and the second electrode. The apparatus further includes a controller that controls the power supply so as to generate dielectric barrier discharge along the surface of the optical window by applying a high-frequency or pulsed voltage between the first electrode and the second electrode.
Claims14
An apparatus cleaning a surface of an optical window, the apparatus comprising:
- a first electrode that is provided inside the optical window and is covered with a dielectric material forming the optical window;
- a second electrode that is provided around the optical window and is exposed at at least one surface of the optical window;
- a power supply that is electrically coupled between the first electrode and the second electrode;
- and
- a controller that controls the power supply so as to generate dielectric barrier discharge along the surface of the optical window by applying a high-frequency or pulsed voltage between the first electrode and the second electrode.
An apparatus for cleaning a surface of an optical window of an engine that introduces a laser from the optical window and ignites an air-fuel mixture in a combustion chamber, the apparatus comprising:
- a first electrode covered with a dielectric material forming the optical window at an inner side of the surface on the combustion chamber side of the optical window;
- a second electrode that is provided around the optical window and is exposed at the surface on the combustion chamber side of the optical window;
- a power supply electrically coupled between the first electrode and the second electrode;
- and
- a controller that controls the power supply so as to generate dielectric barrier discharge along the surface on the combustion chamber side of the optical window by applying a high-frequency or pulsed voltage between the first electrode and the second electrode.
Dependencies are inferred from the claim text.