| 摘要 |
PROBLEM TO BE SOLVED: To provide a virtual image observation device which allows for easily adjusting optical properties such as diopter and view angle.SOLUTION: A virtual image observation device 100 of the present invention comprises a display element 108, an ocular optical unit 131, and an inner optical element 130 located in a light path between the display element and ocular optical unit. The inner optical unit can be selectively rotated to a first rotational position or second rotational position, and a virtual image is displayed differently between the first rotational position and second rotational position. |
