Patent ID: 8366232

Claim:
A landed dot measuring method in which a topology measuring apparatus having an interferometer measures topology of a landed dot which is a functional liquid droplet landed on an inspection sheet when an inspection ejection for a functional liquid droplet ejection head is performed including: inspection-ejecting in which multiple ejection nozzles of a functional liquid droplet ejection head inspection-eject one by one at a given time interval while the functional liquid droplet ejection head is moved in a main scanning direction relatively with respect to the inspection sheet and, the multiple ejection nozzles being arranged to form a line in a sub scanning direction perpendicular to the main scanning direction; and measuring in which respective topologies of multiple landed dots are measured while the topology measuring apparatus follows the functional liquid droplet ejection head and moves in the main scanning direction and in the sub scanning direction at a same speed as the functional liquid droplet ejection head relatively with respect to the inspection sheet.