Patent ID: 8095194

Claim:
A probe device used in a biological light measuring apparatus including a light radiation unit for radiating light on a biological surface and a light detection unit for measuring intensity of the light passing through a living body and emitted from the biological surface, said probe device comprising: a sheet-like probe holder; a plurality of light-emitting probes and a plurality of detection probes mounted on said probe holder at a predetermined interval; a sheet holding unit is configured to hold said probe holder at a predetermined position on the biological surface; and a fixing band that is configured to mount said sheet holding unit on the living body, wherein each of said plurality of the light-emitting probes and the detection probes includes a probe body including a light emitting unit or a detection unit, and a probe mounting part detachably mounting said probe body to said probe holder at a predetermined position, said sheet holding unit surrounds a periphery of said probe holder, and has a predetermined gap between said probe holder and the biological surface so as to form a light-shielded space where light is shielded, said probe body includes a main protrusion provided with a light transmission unit, and a plurality of sub-protrusions disposed around said main protrusion, at one end thereof, said sub-protrusions having substantially the same length as that of said main protrusion and three or more sub-protrusions being provided around said main protrusion and said probe mounting part holds said probe body rotatably about said main protrusion so that one end of said probe body including the main protrusion and the sub-protrusions is exposed to said light-shielded space, the other end of said probe body is exposed to an outside of said probe holder, and the probe body rotates about the main protrusion, and a distance of a portion of said probe holder protruding toward said light-shielded space is larger than a distance of a portion of said probe holder protruding toward the outside.