Patent US5675663A successfully refreshed from Google Patents.
Patent US3763312A successfully refreshed from Google Patents.
US3763312A
Expired / Lapsed
US
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Optical system for photographic film televising apparatus
Assignee: Nippon Columbia Co Ltd
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Filing: 1971-12-08
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Granted: 1973-10-02
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Expires: 1991-12-08
Abstract
Abstract An optical system for single-tube a photographic film televising apparatus in which Fourier transformation and spatial filter techniques are employed in the optical system for reproducing a monochrome photographic film having encoded color information to improve the S/N ratio and remove beat resulting from the construction of an encoder, so as to produce a high-grade reproduced television picture.
Inventors
- 👤 M Yoneyama
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 06:01
CPC Classifications
G; G03; G03B; G03B33/00; H; H04; H04N; H04N5/00; H04N5/76; H04N5/84
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
202 words
In a television image transmission system including a television camera having an image pickup tube with a predetermined spatial frequency response and wherein the image of an object is recorded on a monochromic photographic film with a single color light emitted from a point light source, said monochromic photographic film having recorded thereon luminance information and a plurality of color information of the object image, said image of the object having been recorded on said film after passing through an optical modulation grating consisting of a plurality of strip filter elements of different frequency characteristics, in combination: a. a first optical means defining a Fourier transformation plane for Fourier transformation of said image; b. a spatial filter disposed on the Fourier transformation plane of said first optical means, said spatial filter having an amplitude transmission factor distribution which is the reciprocal of the spatial frequency response of said image pickup tube; and, c. a second optical means defining a plane for inverse Fourier transformation of the spatial frequency spectrum obtained from the first optical means, said television camera being disposed opposite said second optical means for picking up an optical image formed on the Fourier transformation plane of said second optical means.
Claim 2
Dependent Claim
202 words
In a television image transmission system including a television camera having an image pickup tube with a predetermined spatial frequency response and wherein the image of an object is recorded on a monochromic photographic film with a single color light emitted from a point light source, said monochromic photographic film having recorded thereon luminance information and a plurality of color information of the object image, said image of the object having been recorded on said film after passing through an optical modulation grating consisting of a plurality of strip filter elements of different frequency characteristics, in combination: a. a first optical means defining a Fourier transformation plane for Fourier transformation of said image; b. a spatial filter disposed on the Fourier transformation plane of said first optical means, said spatial filter having an amplitude transmission factor distribution which is the reciprocal of the spatial frequency response of said image pickup tube; and, c. a second optical means defining a plane for inverse Fourier transformation of the spatial frequency spectrum obtained from the first optical means, said television camera being disposed opposite said second optical means for picking up an optical image formed on the Fourier transformation plane of said second optical means.
Claim 3
Dependent Claim
36 words
An optical system for pHotographic film televising apparatus as claimed in claim 1, wherein the spatial filter has an amplitude transmission factor distribution which is a reciprocal of a special frequency responses of the photographic film.
Claim 4
Dependent Claim
53 words
An optical system for photographic film televising apparatus as claimed in claim 2, in which the amplitude transmission factor distribution is determined by the pitches of the strip filter elements of the optical modulation grating and the transmission characteristic of a television signal corresponding to the color characteristics of the strip filter elements.
Claim 5
Dependent Claim
63 words
An optical system for photographic film television apparatus as claimed in claim 3 in which the spatial filter has a first circular region permitting passage therethrough of a green color component from the image, a second circular region permitting passage therethrough of a red color component, a third circular region permitting passage therethrough of a blue color component and a light inhibiting region.
Claim 6
Dependent Claim
39 words
An optical system for photographic film television apparatus as claimed in claim 4 in which the first region is disposed on the ray axis and said second and third regions are disposed on different distances from the ray axis.
Claim 7
Dependent Claim
39 words
An optical system for photographic film televising apparatus as claimed in claim 2, in which the amplitude transmission factor distribution cuts off mutual modulation component determined by the pitch of the strip filter elements of the optical modulation grating.
Claim 8
Dependent Claim
41 words
An optical system for photographic film television apparatus as claimed in claim 6 in which the spatial filter includes two regions, one of which passes therethrough all color lights but the other of which inhbiits passage of all color lights therethrough.
Claim 9
Dependent Claim
36 words
An optical system for photographic film television apparatus as claimed in claim 7 in which the region inhibiting passage therethrough of all color lights consists of two circles disposed symmetrical with respect to the ray axis.
Claim 10
Dependent Claim
71 words
An optical system for photographic film television apparatus as claimed in claim 8 in which one of said two circles is disposed with its center on the intersection of two lines, one of which passes through a point representing the primary diffraction of a red color inhibiting striped filter element and the other of which passes through a point representing the primary diffraction of a blue color inhibiting striped filter element.
References Cited (Backward Citations)
US3664248A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-10-01 | 1977-04-02 | 1977-10-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-01 | 1981-04-02 | 1981-10-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-01 | 1985-04-02 | 1985-10-02 | $7700.00 | Window Closed / Lapsed |