Patent ID: 8427729

Claim:
A light adjusting apparatus comprising: a first substrate and a second substrate at least one of which has an aperture; a spacer which defines a distance between the first substrate and the second substrate; at least one incident light adjuster which includes a shaft member as a center of rotation and rotates between the first substrate and the second substrate in a plane orthogonal to an optical axis direction, a magnet being formed on at least part of the shaft; at least one driving device which includes a coil formed separately from the magnet, and drives the incident light adjuster; wherein the driving device rotates the incident light adjuster between a position at the aperture and a position to retract from the position of the aperture, further comprising a guide portion which is formed on the first substrate to restrict movement of the shaft member in directions other than a rotation direction thereof; and wherein both ends of the coil are in contact with an outer wall of the guide portion.