Light control unit, projector, and method of manufacturing light control unit

A method of manufacturing a light-control unit including

• a first light-shielding fin and a second light-shielding fin arranged to have a center axis of light passing therethrough interposed therebetween, and a moving device configured to move the first light-shielding fin and the second light-shielding fin so that respective end portions of the first light-shielding fin and the second light-shielding fin move in directions toward and away from each other, wherein
• the first light-shielding fin and the second light-shielding fin each include an arm configured to engage the moving device and to be moved by the moving device and a light-shielding portion provided on the arm and configured to move with the arm to be arranged in a passage area of the light,
• in at least one of the first light-shielding fin and the second light-shielding fin, (1) the arm and the light-shielding portion are separate members, (2) the light-shielding portion includes a hole portion to which a fixing member configured to fix the arm and the light-shielding portion is fixed, and (3) the arm includes an insertion hole having an inner diameter larger than that of the hole portion, formed at a position corresponding to the hole portion, and configured to allow insertion of the fixing member, the method of manufacturing comprising:
• arranging the light-shielding portion configured as a separate member from the arm on a flat surface;
• overlapping the arm engaged with the moving device on the light-shielding portion arranged on the flat surface to position the arm with respect to the light-shielding portion in a state in which a relative position between the light-shielding portions of the first light-shielding fin and the second light-shielding fin is adjusted;
• and
• fixing the fixing member inserted into the insertion hole to the hole portion to fix the light-shielding portion and the arm in a state in which the relative position is maintained.