| 摘要 |
A biological information measuring sensor (10) has light-receiving regions (21, 22) arranged on a light-receiving element (20) for receiving light from a living body, and a waveguide (15) including an inlet-side opening portion (14a) into which the light enters and an outlet-side opening portion (14b) from which the light exits, provided corresponding to the light-receiving regions (21, 22), and guiding the light to the light-receiving regions (21, 22). The waveguide (15) has a front-side waveguide (15a) and a rear-side waveguide (15b). The front-side waveguide (15a) is positioned closer to the inlet-side opening portion (14a) and formed such that its opening area gradually increases as it is closer from the inlet-side opening portion (14a) to the outlet-side opening portion (14b), and the rear-side waveguide (15b) is positioned closer to the outlet-side opening portion (14b) and formed such that its opening area gradually reduces as it is closer from the inlet-side opening portion (14a) to the outlet-side opening portion (14b). The construction above enables the biological information measuring sensor to efficiently receive light. |
