Patent ID: 8262231

Claim:
A light control device which controls the transmission amount of light emitted from a predetermined emission area, comprising: a rotation member having a rotation axis extending in a direction substantially orthogonal to a center axis of the light; and a light shielding member supported by the rotation member and configured to shield at least a part of the light by rotation of the rotation member, the light shielding member having a light shielding surface which shields received light, the light shielding member being curved with a predetermined curvature around the rotation axis, the light shielding surface being curved in such a manner as to project toward the emission area, the light shielding surface being formed on a convex surface of the light shielding member facing the predetermined emission area such that the light emitted from the emission area is incident to the convex surface of the light shielding surface being formed on the convex surface, the light shielding surface being so processed as to reduce the amount of light reflected by the light shielding surface and reaching the emission area, and the light shielding surface being configured such that a part of the light emitted from the emission area is reflected outside the emission area.