| 摘要 |
PURPOSE:To detect a line of sight with high accuracy by setting the optical arrangement of an illuminating means and a light receiving means and the shape of an optical member having a light dividing plane to divide a luminous flux into an observation system and a line of sight detecting optical system, etc., appropriately. CONSTITUTION:The optical arrangement of the illuminating means 5a-5c and the light receiving means 4, 6 comprising the line of sight detector, the shape of the optical member 1 having the light dividing plane to divide the luminous flux into the observation system and the line of sight detecting optical systems 1, 4-6, and the arrangement of a polarizing plate provided on a part of the illuminating means 5a-5c are comprised appropriately. Therefore, it is possible to prevent optically that the counter light of the luminous flux reflected on each plane of the optical member 1 is made incident on the light receiving means 4, 6, and it goes to noise light. In such a manner, the line of sight can be detected with high accuracy. |
