2.degree./90.degree. Laboratory scattering photometer

US4053229A · kind A · utility

Assignee

• The United States of America as represented by the Administrator of the National Aeronautics and Space Administration · US

Inventor

• William Ross McCluney · Chattanooga, US

Key dates

• Filing date: Jan 13, 1976
• Grant date: Oct 11, 1977
• Expiry date: Jan 13, 1996

Classification

• Technology area (CPC G): Physics
• CPC primary: G01N21/51
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

A scattering photometer for measuring the light scattered by particles in a hydrosol at substantially 2.degree. and 90.degree. simultaneously. Light from a source is directed by a first optical system into a scattering cell containing the hydrosol under study. Light scattered at substantially 90.degree. to the incident beam is focused onto a first photoelectric detector to generate an electrical signal indicative of the amount of scattered light at substantially 90.degree.. Light scattered at substantially 2.degree. to the incident beam is directed through an annular aperture symmetrically located about the axis of the illuminating beam which is linearly transmitted undeviated through the hydrosol and focused onto a second photoelectric detector to generate an electrical signal indicative of the amount of light scattered at substantially 2.degree..