A light emitting device apparatus of an embodiment comprises: a light source unit for emitting a plurality of excitation lights having linearity; a first reflection unit which reflects the plurality of excitation lights having linearity and incident to an incident direction parallel to an axis of symmetry, and collects the plurality of excitation lights to a focus position; and a wavelength conversion unit which is arranged on the focus position and transmits the plurality of excitation lights reflected and collected by the first reflection unit.