Discharge apparatus
AssigneeCanon Kabushiki Kaisha
InventorYusuke Kiyokawa
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Abstract
A discharge head includes an orifice surface in which orifices each configured to discharge a droplet are arrayed in a predetermined direction. A detecting unit includes a light emitting element and a light receiving element, and optically detects a droplet discharged from the orifice. A suppression unit is arranged between the light emitting element and the orifice surface, and suppresses the light emitted from the light emitting element from reaching the orifice surface by shielding at least some rays of the light which is emitted from the light emitting element and propagates to the orifice surface.
Claims14
A discharge apparatus comprising:
- a discharge head that includes an orifice surface in which orifices each configured to discharge a droplet are arrayed in a predetermined direction;
- a detecting unit that includes a light emitting element configured to emit light and a light receiving element configured to receive light emitted from the light emitting element, and configured to optically detect a droplet discharged from the orifice in a state in which the orifice surface of the discharge head is present between the light emitting element and the light receiving element in a predetermined direction;
- and
- a suppression unit that is arranged between the light emitting element and the orifice surface, and configured to suppress light emitted from the light emitting element from reaching the orifice surface by shielding at least some rays of light which is emitted from the light emitting element and propagates to the orifice surface.
Dependencies are inferred from the claim text.