US3720146A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multispectral camera
Assignee: Spectral Data Corp
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Filing: 1972-03-15
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Granted: 1973-03-13
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Expires: 1992-03-15
Abstract
Abstract A multispectral camera simultaneously forms four black-and-white pictures of the same subject on s 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.
Inventors
- 👤 E Yost
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 14:01
CPC Classifications
G; G03; G03B; G03B33/00; G03B33/10
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
77 words
In a multispectral photographic camera for forming four related pictures on photographic film, the improvement wherein the camera comprises four lenses so arranged that the principal points, defined by the intersections of the optical axes of said lenses with said photographic film, define a parallelogram which has two acute and two obtuse angles and further comprises a focal-plane shutter with four slit apertures so arranged that, when said shutter is actuated, said pictures are all formed simultaneously.
Claim 2
Dependent Claim
77 words
In a multispectral photographic camera for forming four related pictures on photographic film, the improvement wherein the camera comprises four lenses so arranged that the principal points, defined by the intersections of the optical axes of said lenses with said photographic film, define a parallelogram which has two acute and two obtuse angles and further comprises a focal-plane shutter with four slit apertures so arranged that, when said shutter is actuated, said pictures are all formed simultaneously.
Claim 3
Dependent Claim
77 words
In a multispectral photographic camera for forming four related pictures on photographic film, the improvement wherein the camera comprises four lenses so arranged that the principal points, defined by the intersections of the optical axes of said lenses with said photographic film, define a parallelogram which has two acute and two obtuse angles and further comprises a focal-plane shutter with four slit apertures so arranged that, when said shutter is actuated, said pictures are all formed simultaneously.
Claim 4
Dependent Claim
77 words
In a multispectral photographic camera for forming four related pictures on photographic film, the improvement wherein the camera comprises four lenses so arranged that the principal points, defined by the intersections of the optical axes of said lenses with said photographic film, define a parallelogram which has two acute and two obtuse angles and further comprises a focal-plane shutter with four slit apertures so arranged that, when said shutter is actuated, said pictures are all formed simultaneously.
Claim 5
Dependent Claim
15 words
A camera as in claim 1 wherein the adjacent legs of the parallelogram are unequal.
Claim 6
Dependent Claim
55 words
A camera as in claim 1 including a plurality of light sources mounted in said camera, at least one of said light sources corresponding to each picture, each of said light sources forming a fiducial mark on said film, there being at least one fiducial mark in a known location with respect to each picture.
Claim 7
Dependent Claim
22 words
A camera according to claim 3 wherein said light sources are of equal intensity and said fiducial marks are of equal density.
References Cited (Backward Citations)
US347451A
Cited
US1826299A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-03-12 | 1976-09-11 | 1977-03-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-03-12 | 1980-09-11 | 1981-03-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-03-12 | 1984-09-11 | 1985-03-13 | $7700.00 | Window Closed / Lapsed |