Photoanalysis apparatus with means for correcting flow rate of fluid carrying particles and/or position of applied light beam for examination and photoanalysis method therefor
US4863264A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 7, 1988 |
| Grant date | Sep 5, 1989 |
| Priority date | — |
| Expiry date | Jun 7, 2008 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2015/1452
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A photoanalysis apparatus includes marker pouring device for pouring markers into one of sheath fluid and fluid carrying particles in a flow-cell device, second optical device for applying a light beam for correction to the markers in the flow-cell device to measure strength of fluorescence or light scattering caused by said markers to generate a signal for correction, second signal processing device for calculating from the signal for correction at least one of a difference in position between a center of the fluid carrying particles in the flow-cell device and a center of a light beam for examination and a difference in flow rate between a predetermined flow rate and an actual flow rate of the fluid carrying particles in the flow-cell device to generate correspondingly at least one of a first command signal for position correction and a second command signal for flow rate correction, and correspondingly at least one of first correcting device for shifting the center of the light beam for examination to the center of the flow of the fluid carrying particles in accordance with the first command signal and second correcting device for correcting the flow rate of the fluid carrying p…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.