Holographic grating imaging spectrometer
First Claim
1. A spectrometer apparatus which comprises means for focusing a light beam onto a concave holographic astigmatic grating capable of focusing light dispersed by said grating onto a flat image plane thereby to produce a reflected light beam having an interference pattern, a step order filter positioned to permit said reflected beam to be transmitted therethrough, a two-dimensional multielement array detector positioned at the focal plane of the concave grating to detect a light beam transmitted through said filter and to produce a detected signal and means for reading said detected signal. PG,12
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Abstract
A spectrometer apparatus is provided including means for focusing a light beam with a concave holographic grating, means for passing light reflected from the grating through a step order filter to an array detector and means for processing signals from the array detector. The spectrometer permits monitoring a plurality of grating orders simultanously without mechanical scanning.
89 Citations
2 Claims
- 1. A spectrometer apparatus which comprises means for focusing a light beam onto a concave holographic astigmatic grating capable of focusing light dispersed by said grating onto a flat image plane thereby to produce a reflected light beam having an interference pattern, a step order filter positioned to permit said reflected beam to be transmitted therethrough, a two-dimensional multielement array detector positioned at the focal plane of the concave grating to detect a light beam transmitted through said filter and to produce a detected signal and means for reading said detected signal. PG,12
Specification
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- Resources
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Current AssigneeSETS Incorporated
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Original AssigneeSETS Incorporated
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InventorsGradie, Jonathan C., Lundeen, Thomas F.
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Primary Examiner(s)Evans, F. L.
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Assistant Examiner(s)HANTIS, KAREN
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Application NumberUS07/571,716Time in Patent Office725 DaysField of Search356/305, 356/307, 356/331, 356/332, 356/334, 356/326, 356/328, 356/324, 356/333, 356/416, 356/419, 250/339US Class Current356/328CPC Class CodesG01J 2003/1273 Order selectionG01J 2003/1828 with order sorter or prefilterG01J 3/1838 Holographic gratingsG01J 3/2803 using photoelectric array d...
