Grism
US6927914B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 10, 2003 |
| Grant date | Aug 9, 2005 |
| Priority date | — |
| Expiry date | Jun 10, 2023 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B27/4244
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
In order to achieve highly dispersive spectrometry in wide wavelength with the use of a single grism, but not a plurality of grisms, the grism is composed of a prism the vertex angle of which can be varied and a volume phase holographic (VPH) grating. More specifically, the grism comprises a prism the vertex angle of which can be varied; and a VPH grating being a diffraction grating and disposed substantially orthogonal with respect to a side including the vertex angle of the prism; the VPH grating being rotated around an axis being substantially orthogonal to the side of the prism, whereby a slope angle defined by the VPH grating and a predetermined plane is varied.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.