Bragg cell spectral analyzer with a prism expansion system
Patent 4626102 Issued on December 2, 1986. Estimated Expiration Date: 
February 6, 2005. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
February 6, 2005. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.InventorsAssigneeApplicationNo. 06/698847 filed on 02/06/1985US Classes:356/328, Having diffraction grating means250/216, Optical or pre-photocell system324/76.37, Bragg cell359/306Correlation or convolutionExaminersPrimary: McGraw, Vincent P.Attorney, Agent or FirmInternational ClassesG02B 27/09 (20060101)G02B 27/58 (20060101) Foreign Application Priority Data1984-02-10 DEAbstractA Bragg cell spectral analyzer with a prism expansion system for a laser beam, which has a Gaussian cross-sectional distribution of light intensity, is generally superimposed with stray light, and is conducted along a path through the system to a Bragg cell characterized by an aperture diaphragm being positioned in the path before the prism expansion system with the diameter of the aperture being selected to be larger than the half-width value of the Gaussian cross-sectional distribution. The prism expansion system only expands the laser beam to such a degree that the half-width value of the Gaussian cross-sectional distribution is smaller than the diameter of an aperture of the Bragg cell. As a result thereof, the diffraction side lobes of the spectrum can be reduced by apodization relative to the principal maximum of the spectrum and stray light contained in the laser beam can be blanked out.Other References
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