Optical measuring apparatus for light scattering

An optical measuring apparatus for a light scatterer comprising a light source part generating light of infrared to near infrared regions, a photodetection part comprising a photodetector having sensitivity in said infrared to near infrared regions, an optical fiber light guide path for guiding and applying said light from said light source part to a surface of a light-scattering target, receiving scattered/reflected light being generated from said surface of said target and guiding the same to said photodetection part, and a signal processor for obtaining a physical property value in said target from a detection signal of said photodetection part, wherein

• said optical fiber light guide path comprises a plurality of unit bundles, each unit bundle including a light projecting optical fiber member being arranged at a center on one end surface, a first photoreceiving optical fiber member group arranged around said light projecting optical fiber member substantially on the circumference of a first circle being concentric with said light projecting optical fiber member, and a second photoreceiving optical fiber member group arranged substantially on the circumference of a second circle being concentric with said light projecting optical fiber member and larger in radius than said first circle, said unit bundles being bundled with first end surfaces thereof flush with each other, said light projecting optical fiber members of respective said unit bundles being bundled and guided to said light source part on the other end surface side, and said first photoreceiving optical fiber member groups and said second photoreceiving optical fiber member groups of respective said unit bundles are bundled independently of each other and guided to said photodetection part, and
• said photodetection part receives respective light components guided by said first photoreceiving optical fiber member groups and said second photoreceiving optical fiber member groups as different signals.