| 摘要 |
PURPOSE:To increase the sensitivity and accuracy in measuring light detection, by providing the photoisolator which isolates the phototransmission section inputting are outputting the incident light and the phototransmission section introducing the detected light optically. CONSTITUTION:The cell main body 1 consisting of cylindrical glass and synthetic resin is provided with the ring shape phototransmission section 2 inputting the outputting the incident light P and the phototransmission section 3 introducing the detected light Q, and the photoisolator 4 mixing dark color material such as black color to glass or synthetic resin is provided between the phototransmission sections 2 and 3. Further, the background 4A of the detected light Q is colored with the black color. Accordingly, the incident light from the incident light window 5 of the phototransmission 2 is a stray light and goes straight to the output light window 6 without propagating and immersing to each part of the wall 1A, and a part of the incident light is introduced to the detection light window 7 of the phototransmission 3. Thus, the detected light can be measured with high sensitivity and high accuracy. |
