Illuminating lens

An illuminating lens, comprising a lens body (100) provided in a light out direction of a light source (200), the lens body (100) forming a light source holding cavity (101), the light source (200) being mounted on a base surface (300), and a main optical axis (201) of the light source (200) being disposed along a normal direction of the base surface (300) and passing through the lens body (100), characterized in that light from the light source (200) passes through the lens body (100) and then exits into a first illumination area (4) and a second illumination area (5), respectively, and the lens body (100) comprises a first optical portion (10), a second optical portion (20), and a third optical portion (30) that are sequentially adjacent to each other, wherein,

• the first optical part (10) being provided on a side of the main optical axis (201) corresponding to the first illumination area (4), comprising a first total reflective surface (13), the first total reflective surface (13) is provided inclined outwardly with respect to the main optical axis (201) and does not intersect with the main optical axis (201), and is adapted to eject a light ray that enters the first optical part (10) outwardly into the near optical axis side of the first illumination area (4) after being fully reflected;
• the second optical portion (20) being provided adjacent to the first optical portion (10), comprising a second total reflective surface (23), the second total reflective surface (23) is provided inclined outwardly with respect to the main optical axis (201) and intersects with the main optical axis (201), and is adapted to eject light rays entering the second optical portion (20) into the far optical axis side of the first illumination area (4) after being fully reflective, and an axial distance of the second total reflective surface (23) from the light source (200) is greater than an axial distance of the first total reflective surface (13) from the light source (200);
• the third optical portion (30) being provided adjacent to the second optical portion (20) on the other side relative to the first optical portion (10), is adapted to eject light entering the third irradiation portion to the second illumination surface (51) after convergence.