Shaped input apertures to improve resolution in grating spectrometers
AssigneeOcean Optics, Inc.
InventorsDavid R. Demmer, Thomas L. Haslett, Jason M. Eichenholz
Life of this patent
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Abstract
An aperture shaped to provide a narrow beam in the horizontal plane but a wider beam in the vertical plane that will provide improved image quality in spectrometers without sacrificing as much throughput as typically experienced using a reduced diameter round aperture along with a method of mounting the entrance slit and the limiting aperture on a transparent block for optical stability and ease of alignment is disclosed.
Claims2
A device for improving image quality in a grating spectrometer or monochromator having a fixed slit width comprising a light entrance slit and an aperture on opposite sides of a transparent input block.
A device for improving image quality in a grating spectrometer or monochromator having a folded optical configuration comprising a light entrance slit and a limiting aperture having a larger aperture number in the dispersion plane than in a plane perpendicular to the dispersion plane further comprising said light entrance slit and said limiting aperture on opposite sides of a transparent input block.
Dependencies are inferred from the claim text.