| 摘要 |
An illumination device (100) is provided with a surface light source (1), a first lens (L1) that has a first focal point (F1) and is disposed on the light-emission surface side of the surface light source, and a second lens (L2) that has a second focal point (F2) and is disposed on the light-emission surface side of the first lens. The surface light source, the first lens, and the second lens are configured so that a first virtual image (I1) is formed by the first lens and a second virtual image (I2) is formed by the second lens. The first virtual image (I1) is formed between the second focal point (F2) and the first lens. The second focal point (F2) is located further to the side opposite the light source than a prescribed focal point position (f'). |
