Broadband astigmatism-free Czerny-Turner imaging spectrometer using spherical mirrors.
We describe the elimination of the astigmatism of a Czerny-Turner imaging spectrometer, built using spherical optics and a plane grating, over a broad spectral region. Starting with the principle of divergent illumination of the grating, which removes astigmatism at one chosen wavelength, we obtain...
| Main Authors: | , , |
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| Format: | Journal article |
| Language: | English |
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2009
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| _version_ | 1797079898685177856 |
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| author | Austin, DR Witting, T Walmsley, I |
| author_facet | Austin, DR Witting, T Walmsley, I |
| author_sort | Austin, DR |
| collection | OXFORD |
| description | We describe the elimination of the astigmatism of a Czerny-Turner imaging spectrometer, built using spherical optics and a plane grating, over a broad spectral region. Starting with the principle of divergent illumination of the grating, which removes astigmatism at one chosen wavelength, we obtain design equations for the distance from the grating to the focusing mirror and the detector angle that remove the astigmatism to first order in wavelength. Experimentally, we demonstrate near diffraction-limited performance from 740 to 860 nm and over a 5 mm transverse spatial extent, while ray-tracing calculations show that barring finite-aperture and detector size limitations, this range extends from 640 to 900 nm and over 10 mm transversely. Our technique requires no additional optics and uses standard off-the-shelf components. |
| first_indexed | 2024-03-07T00:52:25Z |
| format | Journal article |
| id | oxford-uuid:86d8262c-053b-4270-8bf8-21920241a861 |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-07T00:52:25Z |
| publishDate | 2009 |
| record_format | dspace |
| spelling | oxford-uuid:86d8262c-053b-4270-8bf8-21920241a8612022-03-26T22:06:53ZBroadband astigmatism-free Czerny-Turner imaging spectrometer using spherical mirrors.Journal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:86d8262c-053b-4270-8bf8-21920241a861EnglishSymplectic Elements at Oxford2009Austin, DRWitting, TWalmsley, IWe describe the elimination of the astigmatism of a Czerny-Turner imaging spectrometer, built using spherical optics and a plane grating, over a broad spectral region. Starting with the principle of divergent illumination of the grating, which removes astigmatism at one chosen wavelength, we obtain design equations for the distance from the grating to the focusing mirror and the detector angle that remove the astigmatism to first order in wavelength. Experimentally, we demonstrate near diffraction-limited performance from 740 to 860 nm and over a 5 mm transverse spatial extent, while ray-tracing calculations show that barring finite-aperture and detector size limitations, this range extends from 640 to 900 nm and over 10 mm transversely. Our technique requires no additional optics and uses standard off-the-shelf components. |
| spellingShingle | Austin, DR Witting, T Walmsley, I Broadband astigmatism-free Czerny-Turner imaging spectrometer using spherical mirrors. |
| title | Broadband astigmatism-free Czerny-Turner imaging spectrometer using spherical mirrors. |
| title_full | Broadband astigmatism-free Czerny-Turner imaging spectrometer using spherical mirrors. |
| title_fullStr | Broadband astigmatism-free Czerny-Turner imaging spectrometer using spherical mirrors. |
| title_full_unstemmed | Broadband astigmatism-free Czerny-Turner imaging spectrometer using spherical mirrors. |
| title_short | Broadband astigmatism-free Czerny-Turner imaging spectrometer using spherical mirrors. |
| title_sort | broadband astigmatism free czerny turner imaging spectrometer using spherical mirrors |
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