| 摘要 |
<p>Provided is a light intensity adjustment device in which an infrared ray blocking filter can be used in a highly reliable manner as necessary without an excessive increase in thickness. The light intensity adjustment device comprises a light intensity adjustment mechanism for changing an opening surface area to adjust the intensity of transmitted light, and a filter switching mechanism for moving an infrared ray blocking filter (43) to the opening position of the light intensity adjustment mechanism and removing the infrared ray blocking filter from the opening position, wherein a separating member (110) that faces the infrared ray blocking filter of the filter switching mechanism is provided with a recess (110b) for accommodating the infrared ray blocking filter so as to prevent interference.</p> |
