| 摘要 |
<p>PURPOSE:To perform the light amount balance of two flux and the adjustment of absolute light amount simply and continuously, by inserting the detector and the polarizer turned independently in the light path of laser light, between the focussing optical system and the measuring point. CONSTITUTION:When the polarizers 181, 182..., semi-transparent prism 14, full reflection mirrors 15-17, focussed optical system 19 and parallel flat plate 201, 202 are turned incorporatedly, since the plane including the two laser light flux b1, b2 is turned by taking the light axis as the center, the blood flow speed to any direction at the plane orthogonal to the light axis can be measured. Further, to measure the blood flow speed in the blood vane on the eyeground and conjunctiva, if the emitted light amount is made small and the S/N increased, the oscillation of the both flux is made in agreement by the detector and the absolute light amount can be adjusted by turning the polarizers 181, 182 to the detector 24 and if the both polarizers are independently turned, the balance adjustment for the light amount can be made, allowing to increase the S/N.</p> |
