Small-spot spectrometry instrument with reduced polarization
US6667805B2 · kind B2 · utility
7Cited by
14References
25Claims
0Family size
Assignee
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Key dates
| Filing date | Aug 17, 2001 |
| Grant date | Dec 23, 2003 |
| Priority date | — |
| Expiry date | Jan 11, 2022 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B5/3083
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A small-spot imaging, spectrometry instrument for measuring properties of a sample has a polarization-scrambling element, such as a Lyot depolarizer, incorporated between the polarization-introducing components of the system, such as the beamsplitter, and the microscope objective of the system. The Lyot depolarizer varies polarization with wavelength. Sinusoidal perturbation in the resulting measured spectrum can be removed by data processing techniques or, if the depolarizer is thick or highly birefringent, may be narrower than the wavelength resolution of the instrument.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.