LIGHT SOURCE MODULE, LIGHTING DEVICE AND LIGHTING SYSTEM

摘要

A light source module according to the embodiment of the present invention includes a light emitting device, and an optical device which has a first surface which is arranged on the light emitting device and has a groove part which has a center part through which a light axis passes and which is recessed in a light emission direction, and a second surface which is opposite to the first surface and refracts incident light through the groove to the outside. The optical device has recess parts which are arranged on the second surface and are periodically arranged in an edge direction connected to the first surface on the light axis.