| 摘要 |
PROBLEM TO BE SOLVED: To provide a pulse wave sensor capable of reducing noise light and enhancing detection probability. SOLUTION: For this pulse wave sensor 1, a light shielding member 6 is arranged between a light emitting element 3 and a light receiving element 4 housed in a package 2. Sometimes a part of light irradiated from the light emitting element 3 is reflected on the boundary of the surface of a light transmitting plate 5 and the skin surface of a finger F and returns to the light transmitting plate 5. For that, since the light shielding member 6 is arranged between the light emitting element 3 and the light receiving element 4 for the pulse wave sensor 1, the light reflected on the boundary among the light irradiated from the light emitting element 3 is blocked from entering the side of the light receiving element 4 from the light shielding member 6. As a result, the light reflected on the boundary is not directly made incident on the light receiving element 4 and the influence of reflected light is eliminated in the measurement of pulse waves.
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