| 摘要 |
A measuring condition setting jig (2) is fixed to a measured portion (1) of a living body before measurement. A light emission portion (3) and a light reception portion (5) of a measuring optical system are fitted and fixed to a light emission portion fixing portion (10) and a light reception portion fixing portion (11) of the measuring condition setting jig (2) at the time of measurement, respectively. In this way, the measured portion (1) and the measuring optical system are fixed, a desired measuring condition can be accomplished, and this condition can be kept during the measurement. After measurement is finished, the light emission portion (3) and the light reception portion (5) are removed from the light emission portion fixing portion (10) and the light reception portion fixing portion (11), so that the measured portion (1) can be removed from the measuring optical system. When measurement is again made, a desired measuring condition can be reproduced by merely fitting the light emission portion (3) and the light reception portion (5) to the light emission portion fixing portion (10) and the light reception portion fixing portion (11).
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