Optical sensor including a Bragg grating structure for enhanced sensitivity
US5210404A · kind A · utility
69Cited by
3References
4Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 19, 1992 |
| Grant date | May 11, 1993 |
| Priority date | — |
| Expiry date | May 19, 2012 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N21/7743
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
This invention describes a technique for improving the sensitivity of a resonant mirror sensor which has particular applications in areas involving sensing at an interface such as immunosensing using immobilized antibodies. By the introduction of a Bragg grating structure in the sensor, there is produced enhanced dispersion and hence enhanced sensitivity in the region close to the band edge. This improves the detection limit of the sensor without changing the composition or involving the sensor size and allows more sensitive operation at reduced incident angles.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.