Apparatus for near infrared quantitative analysis
US4286327A · kind A · utility
67Cited by
7References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 10, 1979 |
| Grant date | Aug 25, 1981 |
| Priority date | — |
| Expiry date | Sep 10, 1999 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S250/91
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An apparatus for near infrared quantitative analysis with an infrared emitting diode (IRED) source utilizes narrow bandpass filters and silicon detectors to provide highly accurate and inexpensive measurement. A narrow bandpass filter in the light path of the IRED passes wavelengths outside the half power bandwidth points of the IRED. A silicon detector together with a sensitive amplifier is used to accurately measure linearly up to six decades of light sensitivity at desired wavelengths.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.