| 摘要 |
PROBLEM TO BE SOLVED: To provide an optical element that prevents total reflection by making an incident angle of a light beam on an image side surface below a critical angle, even when a light beam made incident from an object side reflects on a chamfer part and is made incident on the image side surface, and has a shape to prevent the occurrence of a double-surface reflection image generated when a photographic lens is observed from the object side.SOLUTION: An optical element constitutes a photographic lens used in an imaging device. When the optical element includes a concave surface R2 on an image side, and a chamfer part T that chamfers an edge of the concave surface R2, a condition expression is satisfied. |
