Abstract: A defect detection device including an illumination optical system, an image capturing optical system configured to capture an image of scattered light generated by the illumination optical system irradiating the wafer, and an image processing unit configured to process a picture of the image of the scattered light to extract a defect on the wafer. The image capturing optical system includes an objective lens, a filter unit configured to shield a part of light transmitted through the objective lens, and an imaging lens configured to form an image of light transmitted through the filter unit. The filter unit includes a first microlens array configured to condense parallel light transmitted through the objective lens, a shutter array including a light transmission unit at a focus position of the first microlens array, and a second microlens array disposed opposite to the first microlens array with respect to the shutter array.

Abstract: A video camera comprises a camera body, a view finder part provided on one side surface of the camera body, a battery receiving part located on the one side surface of the camera body, and a battery which is detachably attached to the battery receiving part to function as a grip of the video camera.

Abstract: A shake-out machine for use with a self-curing mold which includes a body having a bridge-shaped frame and hydraulic cylinder device provided with downwardly directed plungers disposed on top of a ceiling portion of said frame. A mold feeding means arrangement is provided with a wheeled panel serving as a supporting mount for a molding flask during the shake-out operation. The wheeled panel is provided with an opening and is adapted to be run along rails laid on a floor so as to transport the mold under the plungers. A dropped material delivery device, including a wheeled panel capable of running on rails laid on a bottom portion of a pit, is provided with a delivery box mounted on the wheeled panel. The hydraulic cylinder device is equipped with plungers which are operable independently of each other, whereby desired plungers in said hydraulic cylinder device may be lowered by an amount commensurate with the size of a molding flask.