| 摘要 |
<p>An optical system including a lens (30) which is an optical part without a reflecting surface, wherein an incident optical axis (1) and an outgoing optical axis (2) does not agree with each other. An optical axis (4) of the lens (30) is not parallel with nor perpendicular to a plane including an incident position (25) of an incident light, an outgoing position of an outgoing light (55), and the incident optical axis (1) or the outgoing optical axis (2). <IMAGE></p> |
