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US4718764A Expired / Lapsed US ⏱️ 0.0 years remaining

Frequency agile spectrometer

Assignee: Raytheon Co
•
Filing: 1986-01-27
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Granted: 1988-01-12
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Expires: 2006-01-27
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Abstract

Abstract An optical receiver system operative to allow a set of fixed positioned detectors in the same Dewar to be optically directed to concurrently sense any subset of a known set of spectral lines. The system also has a transmitter mode that allows a group of radiation sources having a subset of a possible set of spectral lines to be relatively optically overlapped at the transmitter aperture.

Inventors

  • 👤 David Fink

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-02 23:01
CPC Classifications
H; H01; H01S; H01S3/00; H01S3/005; G; G01; G01J; G01J3/00; G01J3/12; G01J2003/1282; G01J2003/1286; G01J3/14; G01J3/18

Claims Analysis

Total Claims: 35
Claim 1
Independent Claim 149 words
A spectrometer with an arbitrarily programmable dispersion for a known set of electromagnetic spectral lines, comprising: (a) first dispersive means operative to receive a beam of radiation that is a subset of the set of spectral lines for disassembly in unique directions to a locus of predetermined areas for each of the lines; (b) tilted reflective means equal in number to the known set of spectral lines each of said reflective means positioned at a predetermined tilt orientation, said reflective means being operative to receive the disassembled lines from said first dispersive means at their respective predetermined areas for retransmission in a direction determined by said tilt of each of said reflective means; and (c) second dispersive means operative to receive each of the retransmitted lines from said reflective means at preselected separated areas of said second dispersive means for reassembly to a predetermined area that is wavelength independent.
Claim 2
Dependent Claim 149 words
A spectrometer with an arbitrarily programmable dispersion for a known set of electromagnetic spectral lines, comprising: (a) first dispersive means operative to receive a beam of radiation that is a subset of the set of spectral lines for disassembly in unique directions to a locus of predetermined areas for each of the lines; (b) tilted reflective means equal in number to the known set of spectral lines each of said reflective means positioned at a predetermined tilt orientation, said reflective means being operative to receive the disassembled lines from said first dispersive means at their respective predetermined areas for retransmission in a direction determined by said tilt of each of said reflective means; and (c) second dispersive means operative to receive each of the retransmitted lines from said reflective means at preselected separated areas of said second dispersive means for reassembly to a predetermined area that is wavelength independent.
Claim 3
Dependent Claim 16 words
The electromagnetic spectrometer according to claim 1 wherein said first dispersive means is a diffraction grating.
Claim 4
Dependent Claim 16 words
The electromagnetic spectrometer according to claim 1 wherein said reflective means is an array of mirrors.
Claim 5
Dependent Claim 17 words
The electromagnetic spectrometer according to claim 1 wherein said reflective means is an array of reflective elements.
Claim 6
Dependent Claim 16 words
The electromagnetic spectrometer according to claim 1 wherein said second dispersive means is a diffraction grating.
Claim 7
Dependent Claim 49 words
The electromagnetic spectrometer according to claim 4 further including curved mirror means for shortening the path required to separate each of the wavelengths of the disassembled lines before being presented to their respective reflective means and also for reduction of mirror spatial dimensions and length of said mirror array.
Claim 8
Dependent Claim 171 words
A receiver system for optically sensing a known set of spectral lines, comprising: (a) first grating means operative to receive a beam of coherent radiation that is a subset of the known lines for diffraction to a locus of predetermined areas for each of the known lines; (b) tilted mirror means numerically equivalent to the known lines, said mirror means positioned at a predetermined tilt orientation and with each of said mirror means being operative to receive the diffracted lines from said first grating means at their respective predetermined area for retransmission at an angle from the incident determined by said tilt of each of said mirror means; (c) second grating means operative to receive each of the retransmitted lines from said mirror means for reassembling each to a predetermined point; and (d) detection means numerically equivalent to the reassembled lines and with each being operative to receive the reassembled lines from said second grating means for sensing each of the lines at its respective predetermined point that is wavelength independent.
Claim 9
Dependent Claim 171 words
A receiver system for optically sensing a known set of spectral lines, comprising: (a) first grating means operative to receive a beam of coherent radiation that is a subset of the known lines for diffraction to a locus of predetermined areas for each of the known lines; (b) tilted mirror means numerically equivalent to the known lines, said mirror means positioned at a predetermined tilt orientation and with each of said mirror means being operative to receive the diffracted lines from said first grating means at their respective predetermined area for retransmission at an angle from the incident determined by said tilt of each of said mirror means; (c) second grating means operative to receive each of the retransmitted lines from said mirror means for reassembling each to a predetermined point; and (d) detection means numerically equivalent to the reassembled lines and with each being operative to receive the reassembled lines from said second grating means for sensing each of the lines at its respective predetermined point that is wavelength independent.
Claim 10
Dependent Claim 16 words
The receiver system according to claim 7 wherein said first grating means is a diffraction grating.
Claim 11
Dependent Claim 16 words
The receiver system according to claim 7 wherein said mirror means is an array of mirrors.
Claim 12
Dependent Claim 16 words
The receiver system according to claim 7 wherein said second grating means is a diffraction grating.
Claim 13
Dependent Claim 17 words
The receiver system according to claim 7 wherein said detection means is a set of optical detectors.
Claim 14
Dependent Claim 56 words
The receiver system according to claim 7 further includes curved mirror means interposed between said first grating means and said mirror means for shortening the path required to separate each of the wavelengths of the diffracted lines before being presented to their respective mirror means and for reduction of the spatial dimensions of said mirror means.
Claim 15
Dependent Claim 153 words
A transmitter system for optically outputting a known set of spectral lines comprising: (a) radiation means for generating beams at wavelengths that are a subset of the spectral lines; (b) first diffraction means operative to receive the generated beams from said radiation means for dispersal to a locus of areas for each of the lines, said beams being directed to preselected separated areas of said first diffraction means; (c) tilted mirror means numerically equivalent to the lines, each of said mirror means positioned at a predetermined tilt orientation and with each of said mirror means being operative to receive the dispersed lines from said first diffraction means at their respective area for reflection in a direction determined by said tilt of each of said mirror means; and (d) second diffraction means operative to receive each of the reflected lines from said mirror means for reassembly to a predetermined area that is wavelength independent.
Claim 16
Dependent Claim 153 words
A transmitter system for optically outputting a known set of spectral lines comprising: (a) radiation means for generating beams at wavelengths that are a subset of the spectral lines; (b) first diffraction means operative to receive the generated beams from said radiation means for dispersal to a locus of areas for each of the lines, said beams being directed to preselected separated areas of said first diffraction means; (c) tilted mirror means numerically equivalent to the lines, each of said mirror means positioned at a predetermined tilt orientation and with each of said mirror means being operative to receive the dispersed lines from said first diffraction means at their respective area for reflection in a direction determined by said tilt of each of said mirror means; and (d) second diffraction means operative to receive each of the reflected lines from said mirror means for reassembly to a predetermined area that is wavelength independent.
Claim 17
Dependent Claim 16 words
The transmitter system according to claim 13 wherein said radiation means is an array of lasers.
Claim 18
Dependent Claim 16 words
The transmitter system according to claim 13 wherein said first diffraction means is a diffraction grating.
Claim 19
Dependent Claim 16 words
The transmitter system according to claim 13 wherein said mirror means is an array of mirrors.
Claim 20
Dependent Claim 16 words
The transmitter system according to claim 13 wherein said second diffraction means is a diffraction grating.
Claim 21
Dependent Claim 45 words
The transmitter system according to claim 13 further includes curved mirror means interposed between said first diffraction means and said mirror means for shortening the path required to separate each of the wavelengths of the dispersed lines before being presented to their respective mirror means.
Claim 22
Dependent Claim 177 words
An optical receiver for detecting a known set of spectral lines, comprising: (a) first diffracting means operative to receive a beam of radiation that is a subset of the spectral lines for disassembly to a locus of predetermined areas for each of the lines; (b) tilted mirror means numerically equivalent to the known set of spectral lines, said mirror means positioned at a predetermined tilt orientation and with each of said mirror means being operative to receive a disassembled line from said first diffracting means at their respective predetermined area for reflection at an angle determined by the tilt of each said mirror means; (c) second diffracting means operative to receive each of the diffracted lines from said mirror means at preselected separated areas of said second diffracting means for reassembling each to a predetermined point; and (d) sensor means numerically equivalent to the reassembled lines and with each being operative to receive the reassembled lines from said second diffracting means for detecting each of the reassembled lines at its respective predetermined point that is wavelength independent.
Claim 23
Dependent Claim 177 words
An optical receiver for detecting a known set of spectral lines, comprising: (a) first diffracting means operative to receive a beam of radiation that is a subset of the spectral lines for disassembly to a locus of predetermined areas for each of the lines; (b) tilted mirror means numerically equivalent to the known set of spectral lines, said mirror means positioned at a predetermined tilt orientation and with each of said mirror means being operative to receive a disassembled line from said first diffracting means at their respective predetermined area for reflection at an angle determined by the tilt of each said mirror means; (c) second diffracting means operative to receive each of the diffracted lines from said mirror means at preselected separated areas of said second diffracting means for reassembling each to a predetermined point; and (d) sensor means numerically equivalent to the reassembled lines and with each being operative to receive the reassembled lines from said second diffracting means for detecting each of the reassembled lines at its respective predetermined point that is wavelength independent.
Claim 24
Dependent Claim 16 words
The optical receiver according to claim 19 wherein said first diffracting means is a diffraction grating.
Claim 25
Dependent Claim 16 words
The optical receiver according to claim 19 wherein said mirror means is an array of mirrors.
Claim 26
Dependent Claim 16 words
The optical receiver according to claim 19 wherein said second diffracting means is a diffraction grating.
Claim 27
Dependent Claim 17 words
The optical receiver according to claim 19 wherein said sensor means are a set of optical detectors.
Claim 28
Dependent Claim 55 words
The optical receivers according to claim 19 further including curved mirror means interposed between said first diffracting means and said mirror means for shortening the path required to separate each of the wavelengths of the disassembled lines before being presented to their respective mirror means and for reduction of the size of said mirror means.
Claim 29
Dependent Claim 164 words
An optical transmitter for emitting a known set of spectral lines comprising: (a) a plurality of laser means for outputting a beam of coherent radiation of wavelengths that are a subset of the known lines; (b) first diffracting means operative to receive the outputting beam of coherent radiation from said laser means at preselected separated locations dependent on the frequency of said lines for disassembly to a locus of predetermined areas for each of the known lines; (c) titled mirror means numerically equivalent to the known lines each of said mirror means positioned at a predetermined tilt orientation and with each of said mirror means being operative to receive the disassembled lines from said first diffracting means at their respective predetermined area for reflection in a direction determined by said tilt of each of said mirror means; and (d) second diffracting means operative to receive each of the reflected lines from said mirror means for reassembly to a predetermined area that is wavelength independent.
Claim 30
Dependent Claim 164 words
An optical transmitter for emitting a known set of spectral lines comprising: (a) a plurality of laser means for outputting a beam of coherent radiation of wavelengths that are a subset of the known lines; (b) first diffracting means operative to receive the outputting beam of coherent radiation from said laser means at preselected separated locations dependent on the frequency of said lines for disassembly to a locus of predetermined areas for each of the known lines; (c) titled mirror means numerically equivalent to the known lines each of said mirror means positioned at a predetermined tilt orientation and with each of said mirror means being operative to receive the disassembled lines from said first diffracting means at their respective predetermined area for reflection in a direction determined by said tilt of each of said mirror means; and (d) second diffracting means operative to receive each of the reflected lines from said mirror means for reassembly to a predetermined area that is wavelength independent.
Claim 31
Dependent Claim 16 words
The optical transmitter according to claim 25 wherein said laser means is an array of lasers.
Claim 32
Dependent Claim 20 words
The optical transmitter according to claim 25 wherein said first and second diffracting means are at least one diffraction grating.
Claim 33
Dependent Claim 16 words
The optical transmitter according to claim 25 wherein said mirror means is an array of mirrors.
Claim 34
Dependent Claim 16 words
The optical transmitter according to claim 25 wherein said second diffracting means is a diffraction grating.
Claim 35
Dependent Claim 45 words
The optical transmitter according to claim 25 further including curved mirror means for shortening the path required to separate each of the wavelengths of the disassembled lines before being presented to their respective mirror means and for reduction of the size of said mirror means.

References Cited (Backward Citations)

US3472594A Cited
US4200846A Cited
US4238141A Cited
EP0150786A2 Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1991-01-11 1991-07-13 1992-01-12 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1995-01-11 1995-07-13 1996-01-12 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1999-01-11 1999-07-13 2000-01-12 $7700.00 Window Closed / Lapsed

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