Patent Number: 7,826,653

Title: Fluid measuring system and long focal point optical system

Abstract: A fluid measurement system includes a long focus optical system at a CCD camera, and an image processor for comparing particle images taken at two time points for analysis. The long focus optical system is provided with a shield which shields a part including a central portion of a main mirror at an arbitrary shield rate. As a result, the particle image of a tracer is enlarged with its contour kept clear, that is, in focus, and therefore, the image having a luminance which allows analysis by the PIV method can be taken in spite of use of the long focus optical system.

Inventors: Mori; Michitsugu (Tokyo, JP), Tezuka; Hideaki (Tokyo, JP)

Assignee: The Tokyo Electric Power Company, Incorporated

International Classification: G06K 9/00 (20060101); G06K 9/68 (20060101)

Expiration Date: 2019-11-02 0:00:00