| 摘要 |
PURPOSE:To obtain a regulating device of an optical axis for a laser Doppler current meter which is improved so that the flow velocity of a working fluid can be measured by making it possible to discriminate exactly the point of intersection of two laser light beams. CONSTITUTION:A regulating device of an optical axis for a laser Doppler current meter is constructed of a rectangular parallelepiped block 7 which is prepared by mixing particulates of an excellent scattering property, such as particulates of alumina, in transparent glass, which has lattice-shaped scale divisions 8 cut in consideration of a refractive index and of which the opposite faces are parallel and the adjacent faces perpendicular to each other. |
