Light emitting device and light emitting module

A light-emitting device comprising:

• a base having a mounting surface;
• a plurality of first semiconductor laser elements each having a first light emission surface and being configured to emit a laser beam from the light emission surface in a first direction, the plurality of first semiconductor laser elements arranged on the mounting surface in a second direction intersecting the first direction;
• a plurality of second semiconductor laser elements each having a second light emission surface and being configured to emit a second laser beam from the light emission surface in the first direction, and arranged on the mounting surface in the second direction;
• a plurality of first mirror members each having a first reflective surface configured to reflect the first laser beam emitted from a corresponding one of the plurality of first semiconductor laser elements to change a travel direction of the first laser beam into a direction away from the mounting surface;
• a plurality of third mirror members each having a third reflective surface configured to reflect the second laser beam emitted from a corresponding one of the plurality of second semiconductor laser elements to change a travel direction of the second laser beam into a direction away from the mounting surface;
• a cover having a lower surface facing the mounting surface and an upper surface on a side opposite to the lower surface, the cover positioned above the plurality of first semiconductor laser elements, the plurality of first mirror members, the plurality of second semiconductor laser elements, and the plurality of third mirror members, the cover configured to transmit the first laser beams reflected by the first reflective surfaces and the second laser beams reflected by the third reflective surfaces;
• a second mirror member arranged on the upper surface of the cover, and having a second reflective surface configured to reflect the first laser beams transmitted through the cover to further change the travel directions of the first laser beams;
• and
• a fourth mirror member arranged on the upper surface of the cover, at a location further in a direction opposite to the first direction than the second mirror member, the fourth mirror member having a fourth reflective surface configured to reflect the second laser beams transmitted through the cover to further change the travel directions of the second laser beams, wherein:
• the plurality of second semiconductor laser elements are arranged at a location further in the direction opposite to the first direction than the plurality of first semiconductor laser elements,
• the plurality of first mirror members are arranged on the mounting surface such that positions in the first direction of the first reflective surfaces are different from each other,
• the plurality of third mirror members are arranged on the mounting surface such that positions in the first direction of the third reflective surfaces are different from each other, and
• the plurality of third mirror members are arranged at locations further in the direction opposite to the first direction than the plurality of first mirror members.