LIGHT SOURCE MODULE, RANGING DEVICE, AND CONTROL METHOD

To accurately detect damage, peeling and the like of a diffusion plate.SOLUTION: A light source module according to an embodiment comprises: a light source; a housing accommodating the light source and having an emission opening through which light emitted from the light source is emitted; a cover member provided in the emission opening of the housing and transmissive to the light emitted from the light source; a waveguide for guiding a part of the light emitted from the light source in a direction different from a travelling direction of the light emitted from the light source; a detecting unit for detecting a light amount of the light guided through the waveguide; and a drive unit which drives the light source on the basis of the light amount detected by the detecting unit.SELECTED DRAWING: Figure 5 【課題】拡散板の破損や剥がれなどを的確に検出する。【解決手段】実施形態に係る光源モジュールは、光源と、前記光源を収容し、当該光源から出射した光が出射する出射口を備える筐体と、前記筐体の前記出射口に設けられ、前記光源から出射した前記光を透過するカバー部材と、前記光源から出射した前記光の一部を前記光源から出射した光の進行方向とは異なる方向に導く導波路と、前記導波路を介して導かれた前記光の光量を検出する検出部と、前記検出部で検出された前記光量に基づいて前記光源を駆動する駆動部とを備える。【選択図】図５