Patent ID: 7782353

Claim:
An image-forming device comprising: a main casing; and a plurality of image-carrying members, provided in a main casing, for rotating about respective rotational axes, and juxtaposed in a single direction; and an optical scanning unit provided in the main casing comprising: a plurality of laser generators provided one-to-one relationship to the plurality of image-carrying members to emit respective laser beams; a single rotatable polygon mirror that deflects the respective laser beams to scan the respective image-carrying members therewith; a plurality of mirrors wherein each of the plurality of mirrors corresponds to one of the plurality of image-carrying members to guide the respective laser beams along respective optical paths to the respective image-carrying members; and a plurality of lenses, wherein each of the plurality of lenses corresponds to one of the plurality of image-carrying members, and each lens of the plurality of lenses is provided in the respective optical path of the corresponding image-carrying members, and between the respective mirrors and the respective image-carrying members, and wherein distances from the respective mirrors to the respective image-carrying members are substantially equal to one another for each corresponding mirror and image-carrying member, wherein the optical scanning unit comprises: a plurality of adjusting mechanisms having a one-to-one relationship to the plurality of mirrors for adjusting orientations of the respective mirrors, wherein each of the plurality of mirrors has a transmittance portion that allows light to pass through; a plurality of first support portions provided one-to-one relationship to the plurality of mirrors for supporting the respective mirrors; and a plurality of second support members formed from an ultraviolet curable resin and provided between the respective first support portions and the respective transmittance portions, the plurality of second support members being cured by ultraviolet light passing through the respective transmittance portions to support the respective mirrors between the respective first support portions and the respective transmittance portions.