Multiplex spectroscopy
First Claim
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1. Apparatus for analyzing energy emanating from a source having a focal plane, which comprises:
- means at said focal plane for converting said energy from the source into modulated spectral components simultaneously distributed according to frequency along a flat field; and
means for detecting and demodulating said spectral components.
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Abstract
Analysis of energy emanating from a source having a focal plane by converting the energy from the source into modulated spectral components simultaneously distributed according to frequency along a flat field, using, for example, a modulator, and then detecting and demodulating the spectral components, for example by a fast Fourier transform or synchronous demodulator with a ruled grating interposable between the source and the detector and a linear variable bandpass filter interposable between the source and the detector.
268 Citations
17 Claims
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1. Apparatus for analyzing energy emanating from a source having a focal plane, which comprises:
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means at said focal plane for converting said energy from the source into modulated spectral components simultaneously distributed according to frequency along a flat field; and means for detecting and demodulating said spectral components. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. Apparatus for analyzing energy emanating from a source having a focal plane, which comprises:
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means at said focal plane for converting said energy from the source into spectral components simultaneously distributed according to frequency along a flat field; and
means for detecting said spectral components;wherein a linear variable bandpass filter is interposed between said source and said means for detecting said spectral components.
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11. A method of analyzing energy emanating from a source, which comprises:
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(a) converting said energy from the source into spectral components distributed according to frequency along a flat field; and (b) detecting said spectral components;
wherein said spectral components are modulated, further including(c) demodulating said spectral components.
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12. The method of analyzing energy emanating from a source having a focal plane for said energy, which comprises
illuminating said focal plane with light from said source; - and
recombining all wavelengths present at the focal plane into a single beam at an exit aperture. - View Dependent Claims (13, 14, 15, 16)
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17. The method of analyzing energy emanating from a source having a focal plane for said energy, which comprises
illuminating said focal plane with light from said source; - and
placing a modulator such as a chopper wheel at the focal plane so that a set of apertures of width equal to an array pixel (single detector) is spaced in a row close together.
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Specification