Patent US3714875A successfully refreshed from Google Patents.
US3714875A
Expired / Lapsed
US
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Method of multispectral photography and protector
Assignee: Spectral Data Corp
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Filing: 1969-07-16
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Granted: 1973-02-06
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Expires: 1989-07-16
Abstract
Abstract A multispectral camera simultaneously forms four black-and-white pictures of the same subject on a strip of photographic film. A different region of the electromagnetic spectrum is primarily employed in forming each picture. Simultaneously with the forming of the pictures, penlights mounted in the camera form on the film a number of fiducial marks associated with each picture. In projecting the pictures for viewing after they are developed, an additive color viewer is used having a separate projection lens for each picture, the lenses being movable with three degrees of freedom so that the projected images of the fiducial marks can be made to coincide. In this way, the projected images of the four pictures are accurately superimposed to produce a composite image in true or false color. The brightness, saturation, and hue of the projected images of the four pictures are then manipulated in order to extract a wide variety of data regarding the subject.
Inventors
- 👤 E Yost
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:34
CPC Classifications
G; G03; G03B; G03B33/00; G03B33/04
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
304 words
A method of multispectral photography comprising the steps of simultaneously unexposed black-and-white photographic film in a multispectral camera, forming a plurality of pictures of a common scene overflown by an airplane or satellite or the like simultaneously on said photographic film, said pictures utilizing respectively primarily different regions of the actinic electromagnetic spectrum, forming a plurality of fiducial marks on said film in the same relative positions with respect to each said picture, each fiducial mark on each of said pictures corresponding to a fiducial mark on each of the other pictures and each fiducial mark constituting an area and not a thin line, developing said pictures, mounting said developed pictures in a multispectral photographic additive color film projector, simultaneouly projecting said developed pictures and fiducial marks on a viewing screen using lights of selected chromaticities, the chromaticity of the light illuminating at least one of said developed pictures being substantially different from the chromaticity associated with the corresponding exposing spectral zone for that picture, utilizing differently colored filters in projecting said fiducial marks, a differently colored filter being operatively associated with each fiducial mark of a set of corresponding fiducial marks, so that: to the extent that the projected images of corresponding fiducial marks fail to coincide on said viewing screen, the images of such fiducial marks are colored in accordance with the individual colors of the filters respectively associated therewith; and to the extent that the projected images of corresponding fiducial marks do coincide on said viewing screen, the images of such fiducial marks are colored in accordance with the additive colors of the filters respectively associated therewith; and bringing corresponding ones of the projected images of said fiducial marks into coincidence, whereby the projected images of said pictures are accurately superimposed to form a composite image for viewing in false color.
Claim 2
Independent Claim
304 words
A method of multispectral photography comprising the steps of simultaneously unexposed black-and-white photographic film in a multispectral camera, forming a plurality of pictures of a common scene overflown by an airplane or satellite or the like simultaneously on said photographic film, said pictures utilizing respectively primarily different regions of the actinic electromagnetic spectrum, forming a plurality of fiducial marks on said film in the same relative positions with respect to each said picture, each fiducial mark on each of said pictures corresponding to a fiducial mark on each of the other pictures and each fiducial mark constituting an area and not a thin line, developing said pictures, mounting said developed pictures in a multispectral photographic additive color film projector, simultaneouly projecting said developed pictures and fiducial marks on a viewing screen using lights of selected chromaticities, the chromaticity of the light illuminating at least one of said developed pictures being substantially different from the chromaticity associated with the corresponding exposing spectral zone for that picture, utilizing differently colored filters in projecting said fiducial marks, a differently colored filter being operatively associated with each fiducial mark of a set of corresponding fiducial marks, so that: to the extent that the projected images of corresponding fiducial marks fail to coincide on said viewing screen, the images of such fiducial marks are colored in accordance with the individual colors of the filters respectively associated therewith; and to the extent that the projected images of corresponding fiducial marks do coincide on said viewing screen, the images of such fiducial marks are colored in accordance with the additive colors of the filters respectively associated therewith; and bringing corresponding ones of the projected images of said fiducial marks into coincidence, whereby the projected images of said pictures are accurately superimposed to form a composite image for viewing in false color.
Claim 3
Independent Claim
304 words
A method of multispectral photography comprising the steps of simultaneously unexposed black-and-white photographic film in a multispectral camera, forming a plurality of pictures of a common scene overflown by an airplane or satellite or the like simultaneously on said photographic film, said pictures utilizing respectively primarily different regions of the actinic electromagnetic spectrum, forming a plurality of fiducial marks on said film in the same relative positions with respect to each said picture, each fiducial mark on each of said pictures corresponding to a fiducial mark on each of the other pictures and each fiducial mark constituting an area and not a thin line, developing said pictures, mounting said developed pictures in a multispectral photographic additive color film projector, simultaneouly projecting said developed pictures and fiducial marks on a viewing screen using lights of selected chromaticities, the chromaticity of the light illuminating at least one of said developed pictures being substantially different from the chromaticity associated with the corresponding exposing spectral zone for that picture, utilizing differently colored filters in projecting said fiducial marks, a differently colored filter being operatively associated with each fiducial mark of a set of corresponding fiducial marks, so that: to the extent that the projected images of corresponding fiducial marks fail to coincide on said viewing screen, the images of such fiducial marks are colored in accordance with the individual colors of the filters respectively associated therewith; and to the extent that the projected images of corresponding fiducial marks do coincide on said viewing screen, the images of such fiducial marks are colored in accordance with the additive colors of the filters respectively associated therewith; and bringing corresponding ones of the projected images of said fiducial marks into coincidence, whereby the projected images of said pictures are accurately superimposed to form a composite image for viewing in false color.
Claim 4
Independent Claim
304 words
A method of multispectral photography comprising the steps of simultaneously unexposed black-and-white photographic film in a multispectral camera, forming a plurality of pictures of a common scene overflown by an airplane or satellite or the like simultaneously on said photographic film, said pictures utilizing respectively primarily different regions of the actinic electromagnetic spectrum, forming a plurality of fiducial marks on said film in the same relative positions with respect to each said picture, each fiducial mark on each of said pictures corresponding to a fiducial mark on each of the other pictures and each fiducial mark constituting an area and not a thin line, developing said pictures, mounting said developed pictures in a multispectral photographic additive color film projector, simultaneouly projecting said developed pictures and fiducial marks on a viewing screen using lights of selected chromaticities, the chromaticity of the light illuminating at least one of said developed pictures being substantially different from the chromaticity associated with the corresponding exposing spectral zone for that picture, utilizing differently colored filters in projecting said fiducial marks, a differently colored filter being operatively associated with each fiducial mark of a set of corresponding fiducial marks, so that: to the extent that the projected images of corresponding fiducial marks fail to coincide on said viewing screen, the images of such fiducial marks are colored in accordance with the individual colors of the filters respectively associated therewith; and to the extent that the projected images of corresponding fiducial marks do coincide on said viewing screen, the images of such fiducial marks are colored in accordance with the additive colors of the filters respectively associated therewith; and bringing corresponding ones of the projected images of said fiducial marks into coincidence, whereby the projected images of said pictures are accurately superimposed to form a composite image for viewing in false color.
Claim 5
Dependent Claim
43 words
A method according to claim 1 comprising the further step of adjusting the relative scale of said projected images of said pictures with respect to one another so that the scale of each image as projected on said viewing screen is the same.
Claim 6
Dependent Claim
73 words
In a multispectral photographic additive color film projector for simultaneously projecting through separate projection lenses a plurality of black-and-white multispectral pictures on a viewing screen, the improvement wherein the optical centers of said projection lenses are arranged in the corners of a parallelogram which is not a rectangle whereby they cooperate with said pictures in which the centers of the pictures are in the corners of a parallelogram which is not a rectangle.
Claim 7
Dependent Claim
73 words
In a multispectral photographic additive color film projector for simultaneously projecting through separate projection lenses a plurality of black-and-white multispectral pictures on a viewing screen, the improvement wherein the optical centers of said projection lenses are arranged in the corners of a parallelogram which is not a rectangle whereby they cooperate with said pictures in which the centers of the pictures are in the corners of a parallelogram which is not a rectangle.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-02-06 | 1976-08-07 | 1977-02-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-02-06 | 1980-08-07 | 1981-02-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-02-06 | 1984-08-07 | 1985-02-06 | $7700.00 | Window Closed / Lapsed |