Patent ID: 9621777
Date: 2017-04-11
CPC Classifications: G01N,H04N,H05K

Claim:
1. A component imaging device, comprising: a head unit having a first head row including a plurality of vertically movable heads arranged in a row in a first direction, and a second head row including a plurality of vertically movable heads arranged in a row in the first direction and said second head row is disposed away from the first head row with a predetermined distance in a direction parallel to the first direction; a first imaging unit that includes a first image sensor facing upward and images components held by the respective heads from below; a second imaging unit that is disposed on a side of the first imaging unit and images the components held by the respective heads from one side of a second direction perpendicular to the first direction; an illumination device for irradiating illumination light in the second direction for imaging on the components held by the heads; a moving device for relatively moving the head unit along a predetermined path which is parallel with the first direction and is positioned above the first imaging unit, in order to image the components held by the heads; and an imaging control device for performing control related to the component imaging operation, wherein the heads of the first head row and the heads of the second row are arranged to be shifted from each other in the first direction when viewed from the second direction, the illumination device allows the illumination light to have an illumination width adaptable to irradiate two components held by a pair of heads which belong to mutually different head rows and are adjacent to each other in the first direction when viewed from the second direction, and the second imaging unit includes a second image sensor that is disposed to face upward and to be adjacent to the first image sensor in the second direction, and an optical system that guides light from a component held by the head to the second image sensor for generating an image of the component, the optical system includes: a first light-guiding portion that guides, to the second image sensor light from a component that has reached a predetermined first component imaging position located above the first imaging unit, out of the components held by the respective heads of the first head row, as the head unit relatively moves along the predetermined path with respect to the first imaging unit; and a second guiding portion that guides, to the second image sensor, light from a component that has reached a predetermined second component imaging position located above the first imaging unit, out of the components held by the respective heads of the second head row, the first light-guiding portion includes a mirror that is disposed above the second image sensor and reflects light from the component downward so as to guide the light to the second image sensor, and an optical path length from the first component imaging position to the second image sensor is set for the first light-guiding portion so as to obtain a focused image of a component held by a head of the first head row, the second light-guiding portion includes a mirror that is disposed above the second image sensor and reflects light from the component downward so as to guide the light to the second image sensor, and an optical path length from the second component imaging position to the second image sensor is set for the second light-guiding portion so as to obtain a focused image of a component held by a head of the second head row, the first component imaging position and the second component imaging position are set at a same height and are positions where the two components held by the pair of heads which belong to the mutually different head rows and are adjacent to each other in the first direction when viewed from the second direction are located above the first imaging unit, the first light-guiding portion and the second light-guiding portion allow mutually different areas of the second image sensor to simultaneously receive light from the two components held by the pair of heads which belong to the mutually different head rows and are adjacent to each other in the first direction when viewed from the second direction, and the imaging control device controls height positions of the heads and exposure timings of the respective imaging units based on the respective component imaging positions, so that when the head unit relatively moves along the predetermined path with respect to the first imaging unit, a bottom face image of a component held by a head of the first head row is imaged by the first imaging unit and a side image of the component is imaged by the second imaging unit by the first light-guiding portion guiding the light from the component to the second image sensor, while a bottom face image of a component held by a head of the second head row is imaged by the first imaging unit and a side image of the component is imaged by the second imaging unit by the second light-guiding portion guiding the light from the component to the second image sensor, wherein the images of the components held by their respective heads are captured by one or more cameras.