Detecting device and measuring apparatus
The detecting device according to the present disclosure includes a light-emitting portion emitting light, a light-receiving portion receiving the light emitted from the light-emitting portion and exiting from a living body, a holding member holding the light-emitting portion and the light-receiving portion, a sealing member sealing the light-emitting portion and the light-receiving portion, a cover member covering the holding member sealed by the sealing member, and a light transmissive member interposed between the sealing member and the cover member, wherein n1≤n2≤n3, where n1 is a refractive index of the sealing member, n2 is a refractive index of the light transmissive member, and n3 is a refractive index of the cover member.
1 . A detecting device comprising:
a light-emitting diode configured to emit a light toward a living body;
a photodiode configured to receive the light emitted from the light-emitting diode and exiting from the living body;
a housing that holds the light-emitting diode and the photodiode;
a transparent material that covers the light-emitting diode and the photodiode;
a cover that covers the housing and the transparent material; and
a light transmissive layer that is interposed between the transparent material and the cover, wherein
n1≤n2≤n3
where n1 is a refractive index of the transparent material, n2 is a refractive index of the light transmissive layer, and n3 is a refractive index of the cover,
the housing includes a wall protruding through the transparent material toward the cover,
the cover includes a recessed portion, the wall is inserted into the recessed portion, and
the light transmissive layer is disposed between the wall and the recessed portion.
2 . The detecting device according to claim 1 , wherein the cover has a convex portion protruding toward the living body.
3 . A measuring apparatus comprising:
the detecting device according to claim 1 ; and
an information analysis portion configured to determine biological information from a detection signal indicating a detection result from the detecting device.