Patent ID: 8339570
Filing Date: 2012-12-25
Classification: G01B,G03B,G03F

Abstract:
1. A mark position detection device that detects a position of a mark provided on a substrate, the mark position detection device comprising: an image sensor with changeable resolution and readout area in an image pickup surface; an optical system that directs light reflected from the mark to the image sensor; and a control unit configured to detect the position of the mark based on an output of the image sensor, wherein the control unit performs: a first position detection based on the output of the image sensor with a first resolution and a first readout area; and a second position detection based on the output of the image sensor with a second resolution, which has higher resolution than the first resolution, and a second readout area, which is determined to be narrower than the first readout area and lies within the first readout area based on the result of the first position detection.