Use of gradient-index lenses for cavity enhanced absorption spectroscopy
US11867623B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 9, 2022 |
| Grant date | Jan 9, 2024 |
| Priority date | — |
| Expiry date | Apr 24, 2042 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2021/391
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A cavity enhanced absorption spectroscopy (CEAS) system is provided that utilizes collimators the incorporate gradient index (GRIN) lenses in lieu of conventional spherical or aspheric refractive lenses. The use of smaller diameter GRIN lenses facilitates a reduced initial beam size entering the sample cavity, which reduces self-interference noise and increases a signal to noise ratio of the measurements. Further, a reduced size and mass of the GRIN lens can reduce a size of the mounting hardware utilized to mount the optical components, which enables more laser beams to be coupled to a single gas cell compared to a similar gas cell integrated with conventional refractive collimators. A larger number of lasers enables more gas peaks to be measured substantially simultaneously using the CEAS system.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.