Method and apparatus for alignment of multiple beam paths in spectroscopy
US6661509B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 7, 2001 |
| Grant date | Dec 9, 2003 |
| Priority date | — |
| Expiry date | Jul 9, 2021 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2021/656
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Alignment of multiple beam paths in a microscope such as a Raman spectrographic microscope utilizes an alignment instrument that is mounted on the stage of the microscope and positioned by the operator until an aperture of the alignment instrument is at an intended focal point of the microscope. A light source within the alignment instrument is turned on to project light through the aperture which is passed on a return light beam path to the input aperture of a spectrograph where it is detected. Features are included in the return beam path to adjust the beam path until the light detected is maximized, thereby aligning the return beam path to the intended focal point. The light source in the alignment instrument is turned off and a light source in the microscope system, such as a laser, is activated to provide an illumination light beam on a beam path that extends through the objective lens of the microscope, which focuses the beam onto the alignment instrument. The illumination beam that passes through the aperture is detected by a detector within the alignment instrument. The illumination beam path is then adjusted until the detected light is maximized, thereby aligning the illum…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.