| 摘要 |
PURPOSE:To smoothen the flow of a series of inspections, by making the length of a light path at the time of the measurement of absorbancy variable. CONSTITUTION:The light from a light source 1 is transmitted to an optical fiber 2 to irradiate the specimen 5 in a reaction tube 3 from a light transmitting part 2a. This light passes the light path length L formed by the reaction tube 4 to be incident to a light receiving part 7a while absorbed by a specimen 5 and transmits through an optical fiber 7 to be sent to a light detector 8. The detector 8 converts said light to the analogue signal corresponding to the intensity of the incident light to subject the same to each processing on and after through an A/D converter 9. At this time, when the output signal of the converter 9 is out of a range, CPU 10 sends a control signal to positioning mechanisms 3, 6 on the basis of said signal, and the light transmitting part 2a and the light receiving part 7a are altered to a position P1 to measure the absorbancy of the specimen 5 over a light path length L1. At this time, when the over-range of the output signal of said converter 9 is again generated, CPU 10 again sends the control signal to the mechanism parts 3, 6 to change over the light path length to a light path length L2. As mentioned above, since the optimum light path length corresponding to the specimen is selected, re-measurement or dilution is unnecessary and the smoothening of inspection is achieved.
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