Methods for measuring optical absorbance of a sample medium
US7212701B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jun 23, 2006 |
| Grant date | May 1, 2007 |
| Priority date | — |
| Expiry date | Jun 23, 2026 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N21/552
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method for measuring the optical absorbance of a sample medium with a microfluidic chip that includes a substrate defining a microfluidic channel, a microresonator positioned within the microfluidic channel, and at least one waveguide or coupling surface evanescently coupled to the microresonator such that only supported Whispering Gallery Mode (WGM) resonance frequencies are transmitted from the waveguide or coupling surface into the microresonator. A sample medium is disposed into the microfluidic channel to substantially envelop the microresonator and a reader is provided to measure at least a portion of the WGM frequencies transmitted out of the microresonator.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.