Patent ID: 7301620

Claim:
An inspecting apparatus comprising: an illuminating optical system which irradiates irradiation light onto an object to be inspected; an object placing stage which moves the object along a first direction crossing an irradiating direction of the irradiation light; an accumulative sensor which converts a transmitted image or a reflected image of the object into an electric signal; a sensor drive unit which moves the accumulative sensor in the irradiation direction and a second direction crossing the first direction; a moving amount detecting unit which detects a moving amount of the object placing stage in the second direction; a control unit which controls a drive amount of the sensor drive unit in the second direction on the basis of the moving amount in the second direction detected by the moving amount detecting unit; a reference data generating unit which generates reference data of the object; and a data comparing unit which compares the transmitted image data outputted from the accumulative sensor or the reflected image data of the object outputted from the accumulative sensor with the reference data to detect a defect of the object.