An optical device includes: an image-forming optical system forming an image of light from a subject an imaging unit receiving light of the image formed by the image-forming optical system a reflection spectroscopic device covering a given area in an imaging area of the imaging unit and a spectrum detection unit detecting a spectroscopic spectrum of light reflected by the reflection spectroscopic device.一種光學裝置包括:一影像形成光學系統,其形成來自一對象之光之一影像;一成像單元,其接收藉由該影像形成光學系統形成之該影像之光;一反射分光裝置,其覆蓋該成像單元之一成像區域中之一給定區域;及一光譜偵測單元,其偵測藉由該反射分光裝置反射之光的一分光光譜。1...影像形成光學系統2...成像單元3...光譜偵測單元4...反射分光裝置5...波導單元6...光遮蔽單元11...第一透鏡12...隔膜13...第二透鏡14...第三透鏡51...面52...面100...光學裝置A1...箭頭A2...箭頭L1...光線群組L2...光線群組L3...光線群組
