Uniform illumination lens and lamp thereof

A uniform illumination lens, which is arranged between a light source (200) and an illumination surface (300), which includes a light receiving surface (1) and a light distribution surface (2), and the light source (200) is installed on a substrate (4), a normal line (OQ) of the substrate (4) passes through the light source (200), characterized in that:

• the light receiving surface (1) comprises a first incident surface (11) and a second incident surface (12) intersecting, and the first incident surface (11) and the second incident surface (12) constitute the accommodating cavity (13) of the light source (200), and the first incident surface (11) is arranged on one side of the normal line (OQ) away from the illuminated surface (300), and the normal line (OQ) is passed through the second incident surface (12);
• the light distribution surface (2) comprises a connected first outgoing surface (21) and a second outgoing surface (22), the first outgoing surface (21) and the first incident surface (11) are arranged on the same side of the normal line (OQ), and the contact point (C) of the first outgoing surface (21) and the second outgoing surface (22) is closer to the normal line (OQ) than the first incident surface (11);
• the light distribution surface (2) further comprises a reflective surface (3), one end of which is connected to the first outgoing surface (21);
• on one side of the normal line (OQ), all the light entering from the first incident surface (11) in the lens (100) is totally reflected by the reflective surface (3), and the reflected light is emitted through the first outgoing surface (21), and the reflected light does not intersect with the first incident surface (11);
• on the other side of the normal line (OQ), the second outgoing surface (22) receives light entering from the second incident surface (12) on one side of the normal line (OQ).