Combined high spatial resolution and high total intensity select

Details Combined high spatial resolution and high total intensity select Combined high spatial resolution and high total intensity select

1989-09-05

1991-07-02

Rosenberger, Richard A.

Optics: measuring and testing

By particle light scattering

With photocell detection

356338, 350245, G01N 2100

Patent

active

050281356

ABSTRACT:
An improved method of collecting quasi-elastic light scattering (also known as QELS) data and time-average intensity simultaneously is disclosed, as is a novel apparatus therefor. The apparatus utilizes a pair of matched novel optical elements that eliminate the need of index matching fluids that are currently required to eliminate flare from the sample cell walls at the cell-sample and the cell-air interfaces. The novel optical element incorporates desirable aspects of a pinhole aperture optical system and a double lens and center mask optical system.

REFERENCES:
patent: 4176960 (1979-12-01), Eckbreth et al.
patent: 4242194 (1980-12-01), Steiner et al.
patent: 4676641 (1987-06-01), Bott
patent: 4764013 (1988-08-01), Johnston

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