Light emitting device, light illuminating module and light illuminating apparatus

A light emitting device, comprising:

• a substrate;
• multiple LED elements on the substrate, M LED elements being one unit, in which M is an integer greater than 1;
• and
• multiple lenses on the substrate, such than an optical path of each of the M LED elements passes through a respective lens among the multiple lenses,
• wherein the M LED elements are encapsulated in each of the multiple lenses,
• wherein each of the multiple lenses has a convex part that acts as an identification mark for identifying the M LED elements encapsulated in each of the multiple lens, the convex part being formed in a central part of an outer surface of each of the multiple lens and protruding in a direction of an optical axis of each of the multiple lenses, and
• wherein a shape of the convex part varies according to a type of the M LED elements in each of the multiple lenses, such that the type of the M LED elements is identifiable based on the shape of the respective convex part,
• wherein, when viewed in the direction of the optical axis, the convex part of each of the multiple lenses is entirely disposed within an outer periphery of each of the multiple lenses.