Directional lens having lens array

A light emitting device comprising:

• a first light source;
• a first collimator configured to substantially collimate first light emitted from the first light source with respect to a first optical axis;
• a first lens including a plurality of first small lenses configured to make the first light emitted from the first collimator wide-angle with respect to a first direction different from the first optical axis;
• a second light source,
• a second collimator configured to substantially collimate second light emitted from the second light source with respect to a second optical axis;
• a second lens including a plurality of second small lenses configured to make the second light emitted from the second collimator wide-angle with respect to the first direction different from the second optical axis;
• and
• a cover lens having a curved surface shape and disposed downstream of the first lens, wherein
• the first lens and the second lens each include a light incident surface on which light is incident and a light exit surface which light exits,
• the plurality of first small lenses is arranged on the light incident surface of the first lens,
• the plurality of second small lenses is arranged on the light incident surface of the second lens,
• the first small lens has a shape in which a maximum value of an angle formed between a first incident plane of the first lens and a tangent of the first small lens is larger than an angle formed between the first incident plane of the first lens and the first optical axis of the first light,
• the second small lens has a shape in which a maximum value of an angle formed between a second incident plane of the second lens and a tangent of the second small lens is larger than an angle formed between the second incident plane of the second lens and the second optical axis of the second light, and
• the cover lens rotates around a rotational axis line substantially parallel to the first direction.

A lens comprising:

• a light incident surface on which light is incident;
• a light exit surface which light exits;
• and
• a plurality of small lenses arranged on the light incident surface, the small lenses being configured to make first light entering the lens wide-angle with respect to a first direction different from an incident direction of the first light, wherein
• the small lens has a shape in which a maximum value of an angle formed between an incident plane of the lens and a tangent of the small lens is larger than an angle formed between the incident plane of the lens and a first optical axis of the first light in an area at a junction side between the small lenses with respect to a tangent point with the tangent of the small lens extending in a same direction as a direction of the first light.