| 摘要 |
PROBLEM TO BE SOLVED: To provide an optical element-securing member that enables reduction in influence of a temperature change.SOLUTION: An optical element-securing member secures a projection lens 242. A thermal expansion coefficient in an optical axis direction of the projection lens 242 is lower than that in a direction intersecting the optical axis direction. The optical element-securing member is formed of a resin body including an elongated filler, and the resin body orients an elongated direction of the filler in the optical axis direction. The optical element-securing member secures a plurality of optical elements arranged on an optical route composed of a plurality of optical paths including a first optical path and a second optical path extending in a direction intersecting a direction where the first optical path extends, and secures the plurality of optical elements so that a direction where the longest optical path of the plurality of optical paths extends and the optical axis direction of the projection lens are the same. |
