Optical system for high resolution spectrometer/monochromator
AssigneeMichael C. Hettrick
InventorsMichael C. Hettrick, James H. Underwood
Life of this patent
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Abstract
An optical system for use in a spectrometer or monochromator employing a mirror which reflects electromagnetic radiation from a source to converge with same in a plane. A straight grooved, varied-spaced diffraction grating receives the converging electromagnetic radiation from the mirror and produces a spectral image for capture by a detector, target or like receiver.
Claims34
A spectrometer optical system employed in combination with a source of electromagnetic radiation and reception means,
- comprising:
- a. a first concave mirror receiving electomagnetic radiation from the source and reflecting the electromagnetic radiation within a first plane;
- b. a second concave mirror receiving the electromagnetic radiation reflected from the source and reflecting the electromagnetic radiation to converge in a second plane, said first and second planes being substantially orthogonal relative to each other;
- c. a diffraction grating receiving the converging electromagnetic radiation from the source and producing a spectrum for capture by the reception means;
- and
- d. means for rotating said diffraction grating about an axis relative to said diffraction grating.
A spectrometer optical system employed in combination with a source of electromagnetic radiation and reception means comprising:
- a. a first mirror receiving electromagnetic radiation and reflecting the electromagnetic radiation, said first mirror including means for controlling the astigmatism of the image at the reception means;
- b. a second concave mirror receiving the electromagnetic radiation reflected from said first mirror and reflecting the electromagnetic radiation to converge in a plane, said first and second mirrors being positioned substantially orthogonally relative to each other;
- c. a diffraction grating receiving a converging electromagnetic radiation beam from said second concave mirror and producing a spectrum for capture by the reception means;
- and
- d. means for rotating said diffraction grating about an axis relative to said diffraction grating.
An spectrometer optical system employed in combination with a source of electromagnetic radiation and reception means, comprising:
- a. a concave mirror receiving electromagnetic radiation from the source and reflecting the electromagnetic radiation to converge in a plane,
- b. a diffraction grating having a plurality of substantially varied spaced, parallel, grooves receiving the converging electromagnetic radiation from the concave mirror and producing a spectral image for capture by the reception means;
- and
- c. means for rotating said diffraction grating about an axis across said diffraction grating.
A spectrometer optical system employed in combination with a source of electromagnetic radiation and reception means, comprising:
- a. a spherical mirror receiving electromagnetic radiation from the source and reflecting the electromagnetic radiation to converge in a plane;
- and
- b. a diffraction grating including a reflecting surface having a plurality of substantially straight, parallel, grooves of varying spacing from each other, said grating receiving the converging electromagnetic radiation from said source and producing a spectral image for capture by the reception means.
Dependencies are inferred from the claim text.