Method and device for determination of the albedo of a particle of random form
US5715065A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Apr 26, 1996 |
| Grant date | Feb 3, 1998 |
| Priority date | — |
| Expiry date | Apr 26, 2016 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N15/14
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
In order to provide a method and device for determination of the albedo or light absorption of a particle of random form, it is proposed that a particle is electrostatically charged and is positioned contact-free in an Ulbricht sphere by means of an electric field; that the particle thus positioned is illuminated with a measuring light beam passing through the Ulbricht sphere with defined intensity, defined beam cross-section and defined intensity distribution over this; that the intensity of the solely particle-based diffuse radiation in the Ulbricht sphere is measured by means of a sensor; that the cross-sectional area of the particle illuminated by the measuring light beam is determined; that the intensity of the solely reference particle-based diffuse radiation is measured in the same manner with a reference particle with known albedo; and that the albedo of the particle is determined from the ratio of the intensities of the particle-based and reference particle-based diffuse radiation taking into account the cross-sectional area of the particle illuminated by the measuring light beam and the cross-sectional area of the reference particle.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.