| 摘要 |
<p>PROBLEM TO BE SOLVED: To enable suppression of the in-plane variation of transmitted light volume.SOLUTION: There is provided a transmitted light volume adjusting apparatus including a first polarizing plate provided on an optical axis, the first polarizing plate being configured to transmit light in a first polarizing direction, a second polarizing plate provided on the optical axis at a back stage of the first polarizing plate, the second polarizing plate being configured to transmit light in a second polarizing direction, and a first actuator configured to rotate the first polarizing plate and the second polarizing plate around a direction of the optical axis as a rotation axis direction in a state in which a difference between polarizing axes, which is an angle formed by the first polarizing direction and the second polarizing direction, is kept constant.</p> |
