Photon correlator

Details Photon correlator Photon correlator

2005-04-26

2005-04-26

Font, Frank G. (Department: 2877)

Optics: measuring and testing

For size of particles

By particle light scattering

C356S338000, C356S341000, C356S343000, C250S336100

Reexamination Certificate

active

06885448

ABSTRACT:
A photon correlator comprises a plurality of sampling gates11a-11ewhich are open during different periods of time; a plurality of memories12a-12eeach provided corresponding to each of the plurality of sampling gates11a-11efor storing data corresponding to the number of photons; and a data processing control section for reading out the data stored in the memories12a-12e, and performing a correlation calculation by means of software. The mechanism of the hardware comprising the sampling gates11a-11eand memories12a-12eenables high-speed writing of data in the memories and real-time read out of the data. In addition, the software performs correlation calculations in parallel with the above processing. Accordingly, the particle sizes and diffusion coefficient of particles in a fluid can be obtained at high speed under various conditions.

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patent: 2-96636 (1990-04-01), None
patent: 4-181127 (1992-06-01), None

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