Optical element and shelf lamp with the optical element

An optical element, comprising:

• a rectangular light guide plate (100), comprising a front surface (101) for outgoing light, a bottom surface (102) for guiding light, a first side surface (103) for receiving light and a second side surface (104) opposite to the first side surface (103);
• a light source setting portion (200), located on the outer side of the bottom surface (102) near the first side surface (103) and provided with a central axis (002) where the light source (001) is set, and a light emitting direction of the light source (001) faces away from the rectangular light guide plate (100);
• a parallel light lens group (300), disposed at a side of the light source setting portion (200) near the rectangular light guide plate (100), and comprising at least one convex lens (301) arranged along a light-emitting direction of the light source (001);
• and a total reflection lens group (400), disposed between the parallel light lens group (300) and the first side surface (103), a part of the parallel light from the parallel light lens group (300) is subjected to total reflection at least once to form a first parallel light (401) parallel to the front surface (101), and the first parallel light enters the first side surface (103) to make the second side surface (104) emit light;
• another part of the parallel light from the parallel light lens group (300) is totally reflected at least twice to form a second parallel light (402) oblique to the front surface (101), and the second parallel light enters the first side surface (103) to make the front surface (101) emit light;
• wherein the convex lens (301) comprises a flat light incident surface (3011), an arc-shaped outgoing light surface (3012) provided on a side of the light source setting portion (200), an arc-shaped light incident surface (3013) provided between the flat light incident surface (3011) and the central axis (002), and a parallel light total reflection surface (3014) arranged along the light exit direction outside the arc-shaped light incident surface (3013), and the reflected light of the parallel light total reflection surface (3014) is directed toward the total reflection lens group (400).