Patent ID: 8526075

Claim:
A tray for placing granular materials on a reading surface of an image reading device such as a scanner, comprising: a transparent bottom plate; one or a plurality of nontransparent backgrounds vertically upstanding relative to the bottom plate to a height higher than a thickness of the granular materials; and one or a plurality of reflective elements arranged at predetermined intervals in parallel with the background; wherein an alignment plate is fit from an upper direction to the bottom plate of the tray, the alignment plate comprising a protruded section for the background for covering the background, a protruded section for the reflective element disposed in parallel with the protruded section for the background for covering the reflective element, and a plurality of holes having a shape similar to the shape of the granular materials, the granular materials being poured into the holes of the alignment plate fit to the bottom plate so that the granular materials are placed in orderly aligned manner on the bottom plate including the area between the background and the reflective element, and regarding the granular materials placed between the background and the reflective element of the granular materials placed on the bottom plate, a light from a thickness direction of the granular materials is bent and guided via the reflective element to an optical axis direction of an imaging means of the image reading device, so that not only planar images in a longitudinal direction and a width direction of the granular materials but also a side view image in the thickness direction of the granular materials can be received via the imaging means.