PROBLEM TO BE SOLVED: To provide an optical sensor capable of having high resolution without lowering loadability into an analyte.SOLUTION: An optical sensor comprises: an irradiation system including a plurality of light source modules LM having a light source for irradiating the same position of an analyte with a plurality of beams of non-parallel light a control part which controls the light source and a detection system which detects light emitted by the irradiation system and propagated in the analyte. A light source module LM further has an optical system including a lens and a prism arranged on an optical path of light from the light source and emitting a plurality of beams of non-parallel light to the same position, and at least one light receiving element which receives part of each of the plurality of beams from the optical system. The control part controls the quantity of light emitted by the light source on the basis of the quantity of light received by the light receiving element.SELECTED DRAWING: Figure 6COPYRIGHT: (C)2017,JPO&INPIT【課題】 被検体への装着性を低下させずに高分解能を得ることができる光学センサを提供する。【解決手段】 光学センサは、被検体の同一位置に非平行の複数の光を照射する、光源を有する光源モジュールLMを複数含む照射系と、光源を制御する制御部と、照射系から照射され被検体内を伝播した光を検出する検出系と、を備え、光源モジュールLMは、光源からの光の光路上に配置され、非平行な複数の光を上記同一位置に向けて出射する、レンズ及びプリズムを含む光学系と、該光学系からの複数の光それぞれの一部を受光する少なくとも1つの受光素子と、を更に有し、制御部は、受光素子の受光量に基づいて光源の発光量を制御する。【選択図】図6
