| 摘要 |
<p>A total reflection illuminated sensor chip, which is employed in a detection method for detecting target substances utilizing evanescent waves (Ew), is equipped with a dielectric prism (10), on which a detecting portion (14a) is formed. The total reflection illuminated sensor chip is also equipped with a first protective member (10a), for protecting a first light transmitting surface (10b) (a surface of the dielectric prism (10) that a measuring light beam (L) enters through), and for forming a first light transmitting space (11) which is open at least toward the downward direction. The total reflection illuminated sensor chip is configured such that evanescent waves (Ew) are generated by the measuring light beam (L) that enters the first light transmitting space (11) from below the first light transmitting space (11) and passes through the first light transmitting surface (10b).
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