Spectral zonal photography using color-coded photostorage in a color blind panchromatic storage medium

Claim 1

Method of preparing a photostored record of a scene in a photostorage material which has response to light in a prescribed spectral band but does not make a color record within said band of the recorded light, which record is suitable for producing by Fourier transform and spatial and spectral filtering techniques an image of said scene in prescribed colors which may be natural or artificial, which record is made from ''''n'''' light components representing spectral zones within said band of said scene where ''''n'''' is an integer greater than one, said method comprising the steps of: 1. erecting in an image plane an image of said scene; 2. modulating the light of said image in each of said components with a periodic function having a unique azimuthal orientation; 3. selecting a modulating spatial frequency for each of said light components which is substantially twice the highest scene spatial frequency desired to be reconstructed from that component; and 4. forming in said photostorage material from the light of said image as so modulated a photostored record of the sum of the products of said light components each multiplied with its respective modulation.

Claim 20

A method of spectral zonal photography comprising: exposing a photosensitive material responsive to radiation in all spectral zones desired to be recorded to an additive superposition of spectral separation images formed in radiation propagating from a photographed scene in at least three different zones of the electromagnetic spectrum; during the said exposure operation, causing a periodic grating function to be multiplied with each of said separation images, said grating functions having a different azimuthal orientation for each image; selecting a spatial frequency for each of said grating functions which is substantially twice the highest scene spatial frequency desired to be reconstructed from the spectral separation image multiplied with that grating function; and developing the exposed photosensitive material to form a record containing said separation images respectively modulating azimuthally distinct spatial carriers.

Claim 21

A method of spectral zonal photography comprising: exposing a photosensitive material responsive to radiation in all spectral zones desired to be recorded to an additive superposition of spectral separation images formed in radiation propagating from a photographed scene in at least three different zones of the electromagnetic spectrum; during the said exposure operation, causing a periodic grating function to be multiplied with each of said separation images, said grating functions having a different azimuthal orientation for each image; selecting a spatial frequency for each of said grating functions which is substantially twice the highest scene spatial frequency desired to be reconstructed from the spectral separation image multiplied with that grating function; and developing the exposed photosensitive material to form a record containing said separation images respectively modulating azimuthally distinct spatial carriers.

Claim 24

A method of spectral zonal photography, comprising: exposing a photosensitive material responsive to radiation in all spectral zones desired to be recorded to a scene image multiplied with a spectral zonal encoder comprising at least three mutually coextensive, azimuthally distinct periodic arrays of filter elements each having a preferential absorption for a different spectral zone and thus each modulating a different color separation image; selecting a spatial frequency for each of said periodic arrays of filter elements which is substantially twice the highest scene spatial frequency desired to be reconstructed from the color separation image modulated by that array; and developing the exposed photosensitive material to form a record containing said color separation images respectively modulating azimuthally distinct spatial carriers.

Claim 25

A method of spectral zonal photography, comprising: exposing a photosensitive material responsive to radiation in all spectral zones desired to be recorded to a scene image multiplied with a spectral zonal encoder comprising at least three mutually coextensive, azimuthally distinct periodic arrays of filter elements each having a preferential absorption for a different spectral zone and thus each modulating a different color separation image; selecting a spatial frequency for each of said periodic arrays of filter elements which is substantially twice the highest scene spatial frequency desired to be reconstructed from the color separation image modulated by that array; and developing the exposed photosensitive material to form a record containing said color separation images respectively modulating azimuthally distinct spatial carriers.

Claim 26

A method of color photography using monochrome or other recording materials which do not exhibit, when developed, recorded color values in color, comprising: exposing a photosensitive material responsive to radiation in all spectral zones desired to be recorded to a scene multiplied with a spectral zonal filter comprising mutually coextensive, azimuthally distinct periodic arrays of cyan, yellow, and magenta filter elements, said cyan, yellow, and magenta arrays respectively periodically modulating red, blue, and green color separation images; selecting a spatial frequency for each of said periodic arrays of filter elements which is substantially twice the highest scene spatial frequency desired to be reconstructed from the color separation image modulated by that array; and developing said photosensitive material to form a record containing red, blue, and green color separation images respectively modulating azimuthally distinct spatial carriers.

Claim 27

A method of color photography using monochrome or other recording materials which do not exhibit, when developed, recorded color values in color, comprising: exposing a photosensitive material responsive to radiation in all spectral zones desired to be recorded to a scene multiplied with a spectral zonal filter comprising mutually coextensive, azimuthally distinct periodic arrays of cyan, yellow, and magenta filter elements, said cyan, yellow, and magenta arrays respectively periodically modulating red, blue, and green color separation images; selecting a spatial frequency for each of said periodic arrays of filter elements which is substantially twice the highest scene spatial frequency desired to be reconstructed from the color separation image modulated by that array; and developing said photosensitive material to form a record containing red, blue, and green color separation images respectively modulating azimuthally distinct spatial carriers.

Claim 30

A method of spectral zonal photography and reconstruction, comprising: exposing a photosensitive material to a scene multiplied with a spectral zonal filter comprising three mutually coextensive, azimuthally distinct periodic arrays of filter elements each having a preferential absorption for a different spectral zone and thus each modulating a different spectral separation image; selecting a spatial frequency for each of said periodic arrays of filter elements which is substantially twice the highest scene spatial frequency desired to be reconstructed from the spectral separation image modulated by that array; developing said photosensitive material to form a record containing three spectral separation images modulating azimuthally distinct spatial carriers; locating the developed record in a beam of light which is substantially coherent; forming in a Fourier transform space a diffraction pattern of said record including three angularly separated Dirac delta function arrays, each array being convolved with a spectrum of spatial frequencies characterizing a different one of said color separation images; selectively transmitting through said Fourier transform space at least one spectral order of said spatial frequency spectra associated with each of said color separation images; causing the radiation passed through said transform space in each of said spectral orders to have a mean wavelength consonant with the color separation information carried; and retransforming said transmitted spectra to thus produce at an output plane a full spectrum aerial reconstruction of the photographed scene.

Claim 31

A method of spectral zonal photography and reconstruction, comprising: exposing a photosensitive material to a scene multiplied with a spectral zonal filter comprising three mutually coextensive, azimuthally distinct periodic arrays of filter elements each having a preferential absorption for a different spectral zone and thus each modulating a different spectral separation image; selecting a spatial frequency for each of said periodic arrays of filter elements which is substantially twice the highest scene spatial frequency desired to be reconstructed from the spectral separation image modulated by that array; developing said photosensitive material to form a record containing three spectral separation images modulating azimuthally distinct spatial carriers; locating the developed record in a beam of light which is substantially coherent; forming in a Fourier transform space a diffraction pattern of said record including three angularly separated Dirac delta function arrays, each array being convolved with a spectrum of spatial frequencies characterizing a different one of said color separation images; selectively transmitting through said Fourier transform space at least one spectral order of said spatial frequency spectra associated with each of said color separation images; causing the radiation passed through said transform space in each of said spectral orders to have a mean wavelength consonant with the color separation information carried; and retransforming said transmitted spectra to thus produce at an output plane a full spectrum aerial reconstruction of the photographed scene.

Claim 34

A method of color photography and reconstruction using monochrome or other recording materials which do not exhibit, when developed, recorded color values in color, comprising: erecting a full color aerial image of a scene to be photographed at an image plane; locating a color encoding filter at said image plane so as to be multiplied with said scene image, said filter comprising three mutually coextensive, azimuthally separated periodic arrays of different subtractive primary filter elements, each periodic array modulating a different color separation image; selecting a spatial frequency for each of said periodic arrays of filter elements which is substantially twice the highest scene spatial frequency desired to be reconstructed from the color separation image modulated by that array; exposing a photosensitive material to said image multiplied with said filter; developing said material to form a record of said scene in which red, blue, and green color separation images are effectively impressed on spatial carriers having different azimuthal orientations; locating the developed record in light which is substantially coherent; forming in a Fourier transform space at least one diffraction pattern of said record including three angularly separated Dirac delta function arrays respectively convolved with spectra of said red, blue, and green color separation images; selectively transmitting at least one spectral order of each of said arrays through said Fourier transform space; and causing the light carrying said red, blue, and green color separation information to be predominantly red, blue, and green, respectively, whereby a full color aerial reconstruction of said scene is produced.

Claim 35

A method of color photography and reconstruction using monochrome or other recording materials which do not exhibit, when developed, recorded color values in color, comprising: erecting a full color aerial image of a scene to be photographed at an image plane; locating a color encoding filter at said image plane so as to be multiplied with said scene image, said filter comprising three mutually coextensive, azimuthally separated periodic arrays of different subtractive primary filter elements, each periodic array modulating a different color separation image; selecting a spatial frequency for each of said periodic arrays of filter elements which is substantially twice the highest scene spatial frequency desired to be reconstructed from the color separation image modulated by that array; exposing a photosensitive material to said image multiplied with said filter; developing said material to form a record of said scene in which red, blue, and green color separation images are effectively impressed on spatial carriers having different azimuthal orientations; locating the developed record in light which is substantially coherent; forming in a Fourier transform space at least one diffraction pattern of said record including three angularly separated Dirac delta function arrays respectively convolved with spectra of said red, blue, and green color separation images; selectively transmitting at least one spectral order of each of said arrays through said Fourier transform space; and causing the light carrying said red, blue, and green color separation information to be predominantly red, blue, and green, respectively, whereby a full color aerial reconstruction of said scene is produced.

Claim 36

A method of color photography for recording color scenes on monochrome or other recording materials which do not exhibit, when developed, recorded color values in color, comprising: locating at a recording plane a photosensitive material responsive to radiation in all spectral zones desired to be recorded; effecting a multiple exposure of said photosensitive material by, in succession, forming an image of said photographic object on said photosensitive material in radiation in each of a plurality of spectral zones to which said photosensitive material is responsive; during each of said multiple exposures of said photosensitive material, locating at said recording plane a grating having a spatial frequency resolvable by said photosensitive material; selecting a spatial frequency for the grating for each exposure which is substantially twice the highest scene spatial frequency desired to be reconstructed from the color separation image modulated by that grating; causing the grating to have a different relative azimuthal orientation during each exposure of said photosensitive material; and developing the multiple latent color separation images thus formed in said photosensitive material to produce a record containing a plurality of additively superimposed color separation images each of which modulates a spatial carrier having a different azimuthal orientation.

Claim 37

A method of color photography for recording color scenes on monochrome or other recording materials which do not exhibit, when developed, recorded color values in color, comprising: locating at a recording plane a photosensitive material responsive to radiation in all spectral zones desired to be recorded; effecting a multiple exposure of said photosensitive material by, in succession, forming an image of said photographic object on said photosensitive material in radiation in each of a plurality of spectral zones to which said photosensitive material is responsive; during each of said multiple exposures of said photosensitive material, locating at said recording plane a grating having a spatial frequency resolvable by said photosensitive material; selecting a spatial frequency for the grating for each exposure which is substantially twice the highest scene spatial frequency desired to be reconstructed from the color separation image modulated by that grating; causing the grating to have a different relative azimuthal orientation during each exposure of said photosensitive material; and developing the multiple latent color separation images thus formed in said photosensitive material to produce a record containing a plurality of additively superimposed color separation images each of which modulates a spatial carrier having a different azimuthal orientation.

Claim 40

A method of color photography and reconstruction using monochrome or other recording materials which do not exhibit, when developed, recorded color values in color, comprising: locating at a recording plane a photosensitive material responsive to rAdiation in all spectral zones desired to be recorded; effecting a multiple exposure of said photosensitive material by, in succession, forming an image of said photographic object on said photosensitive material in radiation in each of a plurality of spectral zones to which said photosensitive material is responsive; during each of said multiple exposures of said photosensitive material, locating at said recording plane a grating having a spatial frequency resolvable by said photosensitive material; selecting a spatial frequency for the grating for each exposure which is substantially twice the highest scene spatial frequency desire to be reconstructed from the color separation image modulated by that grating; causing the grating to have a different relative azimuthal orientation during each exposure of said photosensitive material; locating the developed record in a beam of light which is substantially coherent; forming in a Fourier transform space a diffraction pattern of said record including three angularly separated Dirac delta function arrays, each array being convolved with a spectrum of spatial frequencies characterizing a different one of said color separation images; selectively transmitting through said Fourier transform space at least one spectral order of said spatial frequency spectra associated with each of said color separation images; retransforming said transmitted spectra; causing the radiation passed through said transform space in each of said spectral orders to have a mean wavelength consonant with the color separation information carried; and retransforming said transmitted spectra to erect at an output plane a full color aerial reconstruction of the photographed scene.

Claim 41

A method of color photography and reconstruction using monochrome or other recording materials which do not exhibit, when developed, recorded color values in color, comprising: locating at a recording plane a photosensitive material responsive to rAdiation in all spectral zones desired to be recorded; effecting a multiple exposure of said photosensitive material by, in succession, forming an image of said photographic object on said photosensitive material in radiation in each of a plurality of spectral zones to which said photosensitive material is responsive; during each of said multiple exposures of said photosensitive material, locating at said recording plane a grating having a spatial frequency resolvable by said photosensitive material; selecting a spatial frequency for the grating for each exposure which is substantially twice the highest scene spatial frequency desire to be reconstructed from the color separation image modulated by that grating; causing the grating to have a different relative azimuthal orientation during each exposure of said photosensitive material; locating the developed record in a beam of light which is substantially coherent; forming in a Fourier transform space a diffraction pattern of said record including three angularly separated Dirac delta function arrays, each array being convolved with a spectrum of spatial frequencies characterizing a different one of said color separation images; selectively transmitting through said Fourier transform space at least one spectral order of said spatial frequency spectra associated with each of said color separation images; retransforming said transmitted spectra; causing the radiation passed through said transform space in each of said spectral orders to have a mean wavelength consonant with the color separation information carried; and retransforming said transmitted spectra to erect at an output plane a full color aerial reconstruction of the photographed scene.

Claim 44

A method of spectral zonal photography for recording color values on monochrome or other recording materials which do not exhibit, when developed, recorded color values in color, comprising: erecting a full-color aerial image of a scene to be photographed at a first image plane; locating a grating at said first image plane so as to be multiplied with said scene image, said grating comprising a plurality of mutually coextensive azimuthally separated periodic arrays of alternately opaque and neutral areas, said grating acting as a beam splitter to produce distinct diffraction distributions along the direction vectors of each of said azimuthally separated periodic arrays to form a radial spokelike composite diffraction distribution; locating spectral filters having passbands characterizing different spectral zones over the diffraction distributions associated with each of said periodic arrays; collecting light passed by said spectral filters and forming at a second image plane a second image of said scene, representing the distribution at said first image plane as modified by said grating and said spectral filters; and recording said second image on a photosensitive material located at said second image plane, the record thus formed comprising an additive superposition of color separation images defined by said spectral passbands of said spectral filters, said color separation images respectively modulating spatial carriers at different azimuthal orientations corresponding to the azimuthal orientations of said periodic arrays in said grating.

Claim 45

A method of spectral zonal photography for recording color values on monochrome or other recording materials which do not exhibit, when developed, recorded color values in color, comprising: erecting a full-color aerial image of a scene to be photographed at a first image plane; locating a grating at said first image plane so as to be multiplied with said scene image, said grating comprising a plurality of mutually coextensive azimuthally separated periodic arrays of alternately opaque and neutral areas, said grating acting as a beam splitter to produce distinct diffraction distributions along the direction vectors of each of said azimuthally separated periodic arrays to form a radial spokelike composite diffraction distribution; locating spectral filters having passbands characterizing different spectral zones over the diffraction distributions associated with each of said periodic arrays; collecting light passed by said spectral filters and forming at a second image plane a second image of said scene, representing the distribution at said first image plane as modified by said grating and said spectral filters; and recording said second image on a photosensitive material located at said second image plane, the record thus formed comprising an additive superposition of color separation images defined by said spectral passbands of said spectral filters, said color separation images respectively modulating spatial carriers at different azimuthal orientations corresponding to the azimuthal orientations of said periodic arrays in said grating.

Claim 46

A method of color photography for recording color scenes on monochrome or other recorDing materials which do not exhibit, when developed, recorded color values in color, comprising: erecting an aerial image of a scene to be photographed at a first image plane; locating a grating at said first image plane so as to be multiplied with said scene image, said grating comprising three mutually coextensive azimuthally separated periodic arrays of alternately opaque and neutral areas, said grating acting as a beam splitter to produce three distinct diffraction distributions along the direction vectors of each of said azimuthally separated periodic arrays to form a radial spokelike composite diffraction distribution; locating red, blue, and green spectral filters respectively over said three diffraction distributions associated with said three periodic arrays; collecting light passed by said spectral filters and forming at a second image plane a second image of said scene, representing the distribution at said first image plane as modified by said grating and said spectral filters; recording said second image on a photosensitive material located at said second image plane, the record thus formed comprising an additive superposition of red, blue, and green color separation images defined by said spectral filters, said color separation images respectively modulating spatial carriers at different azimuthal orientations corresponding to the relative azimuthal orientations of said periodic arrays in said grating; locating said record in a beam of substantially coherent light; forming in a Fourier transform space at least one diffraction pattern of said record including three angularly separated Dirac delta function arrays respectively convolved with spectra of red, blue, and green color separation images; selectively transmitting at least one spectral order of each of said arrays through said Fourier transform space; and causing the light carrying said red, blue, and green color separation information to be predominantly red, blue, and green, respectively, whereby a full color aerial reconstruction of said scene is produced.

Claim 47

A method of color photography for recording color scenes on monochrome or other recorDing materials which do not exhibit, when developed, recorded color values in color, comprising: erecting an aerial image of a scene to be photographed at a first image plane; locating a grating at said first image plane so as to be multiplied with said scene image, said grating comprising three mutually coextensive azimuthally separated periodic arrays of alternately opaque and neutral areas, said grating acting as a beam splitter to produce three distinct diffraction distributions along the direction vectors of each of said azimuthally separated periodic arrays to form a radial spokelike composite diffraction distribution; locating red, blue, and green spectral filters respectively over said three diffraction distributions associated with said three periodic arrays; collecting light passed by said spectral filters and forming at a second image plane a second image of said scene, representing the distribution at said first image plane as modified by said grating and said spectral filters; recording said second image on a photosensitive material located at said second image plane, the record thus formed comprising an additive superposition of red, blue, and green color separation images defined by said spectral filters, said color separation images respectively modulating spatial carriers at different azimuthal orientations corresponding to the relative azimuthal orientations of said periodic arrays in said grating; locating said record in a beam of substantially coherent light; forming in a Fourier transform space at least one diffraction pattern of said record including three angularly separated Dirac delta function arrays respectively convolved with spectra of red, blue, and green color separation images; selectively transmitting at least one spectral order of each of said arrays through said Fourier transform space; and causing the light carrying said red, blue, and green color separation information to be predominantly red, blue, and green, respectively, whereby a full color aerial reconstruction of said scene is produced.

Claim 48

A method of recording multicolor images on black-and-white silver halide photographic film by spectral zonal photography for subsequent retrieval and display of said images in color by spatial and spectral filtering, wherein the recorded image has essentially no intrinsic color other than black and white and carries color information in spatially distributed modulations of the recording image, compressing: exposing a black-and-white substantially panchromatically sensitive photographic film simultaneously to a self-registered plurality of spectrally separated images of a multicolor scene formed in radiation propagating from said scene, said images being separated into at least three separate zones of the visible light spectrum; during said exposure operation, causing a spatially periodic light modulation function to be multiplied with each of said spectrally separated images substantially throughout said image, said light modulation functions each having a unique azimuthal orientation which characterizes the spectrally separated image modulated thereby for separation in Fourier transform space from the remainder of said images, the spatial frequency of each of said light modulation functions being substantially twice as great as the highest scene spatial frequency desired to be recorded in the image modulated thereby; and developing the thus exposed photographic film to form a composite record of said images each bearing its spatially periodic modulation having said unique azimuthal orientation.

Claim 49

A method of recording multicolor images on black-and-white silver halide photographic film by spectral zonal photography for subsequent retrieval and display of said images in color by spatial and spectral filtering, wherein the recorded image has essentially no intrinsic color other than black and white and carries color information in spatially distributed modulations of the recording image, compressing: exposing a black-and-white substantially panchromatically sensitive photographic film simultaneously to a self-registered plurality of spectrally separated images of a multicolor scene formed in radiation propagating from said scene, said images being separated into at least three separate zones of the visible light spectrum; during said exposure operation, causing a spatially periodic light modulation function to be multiplied with each of said spectrally separated images substantially throughout said image, said light modulation functions each having a unique azimuthal orientation which characterizes the spectrally separated image modulated thereby for separation in Fourier transform space from the remainder of said images, the spatial frequency of each of said light modulation functions being substantially twice as great as the highest scene spatial frequency desired to be recorded in the image modulated thereby; and developing the thus exposed photographic film to form a composite record of said images each bearing its spatially periodic modulation having said unique azimuthal orientation.

Claim 50

A method of recording multicolor images on black-and-white silver halide photographic film by spectral zonal photography for subsequent retrieval and display of said images in color by spatial and spectral filtering, wherein the recorded image has essentially no intrinsic color other than black and white and carries color information in spatially distributed modulations of the recordeD image, comprising: exposing a black-and-white substantially panchromatically sensitive photographic film simultaneously to a self-registered plurality of spectrally separated images of a multicolor scene formed in radiation propagating from said scene, said images being separated into at least three separate zones of the visible light spectrum; during said exposure operation, causing a spatially periodic light modulation function to be multiplied with each of said spatially separated images substantially throughout said image, said light modulation functions each having a unique azimuthal property which characterizes the spectrally separated image modulated thereby for separation in Fourier transform space from the remainder of said images, the spatial frequency of each of said light modulation functions being substantially twice as great as the highest scene spatial frequency desired to be recorded in the image modulated thereby; and developing the thus exposed photographic film to form a composite record of said images each bearing its spatially periodic modulation having said unique azimuthal property; modulating with said record a beam of light that is substantially coherent; forming in a Fourier transform space from said light as so modulated a diffraction pattern of said record including a plurality, the same in number as said plurality of spectrally separated images, of spatially separated Dirac delta function arrays, each array being convolved with a spectrum of spatially dispersed frequencies and characterizing a unique one of said spectrally separated images; selectively transmitting through said Fourier transform space from each of said arrays the spectral zone corresponding to the spectral zone of the spectrally separated image characterized by said array; and retransforming light of said transmitted zones to thus produce at an output space an aerial reconstruction of said multicolor scene.

Claim 51

A method of recording multicolor images on black-and-white silver halide photographic film by spectral zonal photography for subsequent retrieval and display of said images in color by spatial and spectral filtering, wherein the recorded image has essentially no intrinsic color other than black and white and carries color information in spatially distributed modulations of the recordeD image, comprising: exposing a black-and-white substantially panchromatically sensitive photographic film simultaneously to a self-registered plurality of spectrally separated images of a multicolor scene formed in radiation propagating from said scene, said images being separated into at least three separate zones of the visible light spectrum; during said exposure operation, causing a spatially periodic light modulation function to be multiplied with each of said spatially separated images substantially throughout said image, said light modulation functions each having a unique azimuthal property which characterizes the spectrally separated image modulated thereby for separation in Fourier transform space from the remainder of said images, the spatial frequency of each of said light modulation functions being substantially twice as great as the highest scene spatial frequency desired to be recorded in the image modulated thereby; and developing the thus exposed photographic film to form a composite record of said images each bearing its spatially periodic modulation having said unique azimuthal property; modulating with said record a beam of light that is substantially coherent; forming in a Fourier transform space from said light as so modulated a diffraction pattern of said record including a plurality, the same in number as said plurality of spectrally separated images, of spatially separated Dirac delta function arrays, each array being convolved with a spectrum of spatially dispersed frequencies and characterizing a unique one of said spectrally separated images; selectively transmitting through said Fourier transform space from each of said arrays the spectral zone corresponding to the spectral zone of the spectrally separated image characterized by said array; and retransforming light of said transmitted zones to thus produce at an output space an aerial reconstruction of said multicolor scene.