Method and apparatus for measuring the concentration of absorbing substances
US5112124A · kind A · utility
69Cited by
38References
18Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 19, 1990 |
| Grant date | May 12, 1992 |
| Priority date | — |
| Expiry date | Apr 19, 2010 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B5/14532
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A non-invasive system for measuring the concentration of an analyte in an absorbing matrix is described. The system directs a beam of radiation at the matrix. The beam consists of a series of successive alternate pulses of electro-magnetic radiation, one of which is highly absorbed by the analyte and the other of which is non-absorbed. The transmitted or reflected beam is optically detected and an electrical signal proportional to beam intensity is used to adjust the beam intensity and as a measure of analyte concentration.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.