| 主权项 |
1. An assembly device for a writing head unit including one or more writing heads mounted on a head holder, comprising:
an imaging unit to image the writing head in a state in which the writing head is mounted on the head holder; an adjuster to adjust relative positions of the head holder and the writing head mounted on the head holder; and an optical unit to focus images of reference marks and an alignment mark of the writing head, simultaneously on the same viewing field of the imaging unit, the reference marks indicating a reference position of the writing head and disposed in a direction different from the writing head with respect to the imaging unit, wherein a beam splitter of the optical unit is disposed at a position to receive both (i) light reflected from the writing head and (ii) light reflected from a member including the reference marks, and wherein the adjuster adjusts the relative positions of the head holder and the writing head using images of the alignment mark and the reference marks, imaged simultaneously by the imaging unit. |
