| 摘要 |
PROBLEM TO BE SOLVED: To provide a pulse wave detector highly precisely detecting a pulse wave by removing the effect of a sunlight. SOLUTION: A pulse wave sensor 3 is used by being fixed to an arm or the like of a human body and, as shown in Fig. (a), provided with an infrared LED 21 and a green LED 23 as light emitting elements and a photodiode 25 as a light receiving element. A light shielding plate 31 is disposed to cover the end face of a light transmission plate. The light shielding plate 31 employs a material having such a flexible characteristic as being in contact with the skin without any clearance, when a pulse wave sensor 3 is fixed to the arm or the like of the human body. The surface in the side of the light shielding plate 31 being in contact with the skin, is painted with a light-absorbing color. Projecting parts 33 are disposed on the light shielding plate 31 (refer to Fig. (b)) surrounding the light transmission plate 29. It is sufficient that if only the projecting part 33 has a height of producing a depression on the skin, when fixing the pulse wave sensor on the arm or the like. COPYRIGHT: (C)2005,JPO&NCIPI
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