Droplet determination device and droplet determination...

Details Droplet determination device and droplet determination... Droplet determination device and droplet determination...

2005-03-04

2009-02-17

Shah, Manish S (Department: 2853)

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C347S008000

Reexamination Certificate

active

07490918

ABSTRACT:
The droplet determination device for a droplet discharge apparatus, includes a droplet discharge device having droplet discharge ports which discharge liquid droplets; a detection device in which a light source and a light sensor are disposed in such a manner that an optical axis of a light beam formed between the light source and the light sensor is substantially perpendicular to a direction of flight of the droplets discharged from the droplet discharge ports, and the optical axis of the light beam is substantially parallel to a droplet discharge port surface in which the droplet discharge ports are arranged; an optical system which forms the light beam into substantially parallel light, when the optical axis is viewed from a direction perpendicular to the optical axis, of which a cross-sectional shape in the direction perpendicular to the optical axis of the light beam is elongated in the direction of flight of the droplets; and a discharge judgment device which judges a discharge status of the droplet according to a detection signal obtained from the detection device when the droplet is discharged into the light beam.

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