| 摘要 |
PROBLEM TO BE SOLVED: To accurately obtain information including the speed and volume of liquid droplets in an inkjet drawing device by a simply structured device. SOLUTION: The inkjet drawing device has at lest one channel 2 which discharges liquid droplets 5, a light source 31, and a light receiving section 32 which receives light from the light source. The course of the liquid droplets 5 intersects an optical path from the light source 31 to the light receiving section 32. The drawing device is provided with a transmissivity computation section 40d which computes transmissivity ai [ai is represented by (bo-bi)/bo] from the receiving amount of light bi in the light receiving section 32 in a period when a plurality of liquid droplets 5, 5, 5, 5 discharged from the channel 2 pass over the optical path and the receiving amount of light bo at the time when the liquid droplets do not pass over the optical path. COPYRIGHT: (C)2007,JPO&INPIT |
