An optical shutter including a multi-layer fixed filter and a multi-layer movable
filter arranged with a gap therebetween controls the transmittance of light passing
through the multi-layer filters. The optical shutter includes minute driving elements
provided on the movable filter. Operating the minute driving elements varies a
distance of the gap defined between the fixed filter and the movable filter. Operation
of the movable filter is restricted by a stopper that comes into contact with the
movable filter when the gap has the maximum distance and by a bump formed on the
fixed filter. The minute driving elements are joined to the movable filter with
elastic bonding layers therebetween.