Light adjusting apparatus

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.