Patent US3842202A successfully refreshed from Google Patents.
US3842202A
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Combination of a transmissive diffractive phase-grating and a television picture-tube in operative juxtaposition to each other
Assignee: LEVY M AND CO Inc
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Filing: 1972-11-06
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Granted: 1974-10-15
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Expires: 1992-11-06
Abstract
Abstract The combination of a phase-grating and a television picturetube, in which the phase-grating is operatively juxtaposed to the face of the picture-tube, with the lines or rows of high and low areas of the grating generally parallel to or otherwise operatively oriented to the scan-lines or matrix of the picturetube, and at such distance from the picture-surface of the tube that the two diffractive images of the information areas on the picture-surface of the tube will be spaced from each other to the maximum extent possible without overlap.
Inventors
- 👤 E Coale
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 12:40
CPC Classifications
H; H04; H04N; H04N5/00; H04N5/72; H01; H01J; H01J29/00; H01J29/86; H01J29/89
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
256 words
The below-described combination (Y) of a television picturetube and a transmissive diffractive phase-grating (X), X. which phase-grating comprises a parallel-sided transparent polished plate, at least one side of which is composed of two sets of alternating polished surface-portions, the surfaceportions of each set being generally uniformly spaced apart and co-planar with each other and being of generally equal areas, and the surface portions of one set alternating with the surface-portion of the other set in generally uniform array, and the co-planar surface-portions of one set being offset with respect to the co-planar surface-portions of the other set, with the common plane of the one set being parallel with the common plane of the other set, and the thickness of the plate in the areas of one set and the thickness of the plate in the areas of the other set differing by about 6100 Angstrom units, whereby substantially all transmission of the zeroth-order of generally all frequencies of visible light is nulled and diverted and distributed into pairs of diffractive first-order spectral images each containing close to one-half of the energy of the so nulled zeroth-order of light, Y. in which combination the phase-grating is operatively juxtaposed to the face of the picture-tube, with the alternating surface-portions of the grating oriented in relation to the picture-particulating matrix of the picturetube and at such distance from the phosphor portions thereof that the two first order diffractive spectral images of the particulated information-areas on the picture-surface of the tube will be substantially spaced from each other without overlap.
Claim 2
Dependent Claim
256 words
The below-described combination (Y) of a television picturetube and a transmissive diffractive phase-grating (X), X. which phase-grating comprises a parallel-sided transparent polished plate, at least one side of which is composed of two sets of alternating polished surface-portions, the surfaceportions of each set being generally uniformly spaced apart and co-planar with each other and being of generally equal areas, and the surface portions of one set alternating with the surface-portion of the other set in generally uniform array, and the co-planar surface-portions of one set being offset with respect to the co-planar surface-portions of the other set, with the common plane of the one set being parallel with the common plane of the other set, and the thickness of the plate in the areas of one set and the thickness of the plate in the areas of the other set differing by about 6100 Angstrom units, whereby substantially all transmission of the zeroth-order of generally all frequencies of visible light is nulled and diverted and distributed into pairs of diffractive first-order spectral images each containing close to one-half of the energy of the so nulled zeroth-order of light, Y. in which combination the phase-grating is operatively juxtaposed to the face of the picture-tube, with the alternating surface-portions of the grating oriented in relation to the picture-particulating matrix of the picturetube and at such distance from the phosphor portions thereof that the two first order diffractive spectral images of the particulated information-areas on the picture-surface of the tube will be substantially spaced from each other without overlap.
Claim 3
Dependent Claim
249 words
The below-described combination (Y) of a television picture-tube and a transmissive diffractive phase-grating (X), X. which phase-grating comprises a parallel-sided transparent polished plate, at least one side of which is composed of two sets of alternating polished surface-portions, the surface-portions of each set being generally uniformly spaced apart and co-planar with each other and being of generally equal areas, and the surface-portions of one set alternating with the surface-portion of the other set in generally uniForm array, and the co-planar surface-portions of one set being offset with respect to the co-planar surface-portions of the other set, with the common plane of the one set being parallel with the common plane of the other set, and the thickness of the plate in the areas of one set and the thickness of the plate in the areas of the other set differing by about 6100 Angstrom units, whereby substantially all transmission of the zeroth-order of generally all frequencies of visible light is nulled and diverted and distributed into pairs of diffractive first-order spectral images each containing close to one-half of the energy of the so nulled zeroth-order of light, Y. in which combination the phase-grating is operatively juxtaposed to the face of the picture-tube, with the alternating surface-portions thereof arrayed generally parallel to the scan-lines on the picture-tube and at such distance therefrom that the two diffractive spectral images of the information-areas on the picture-surface of the tube will be spaced from each other to the maximum extent possible without overlap.
Claim 4
Dependent Claim
249 words
The below-described combination (Y) of a television picture-tube and a transmissive diffractive phase-grating (X), X. which phase-grating comprises a parallel-sided transparent polished plate, at least one side of which is composed of two sets of alternating polished surface-portions, the surface-portions of each set being generally uniformly spaced apart and co-planar with each other and being of generally equal areas, and the surface-portions of one set alternating with the surface-portion of the other set in generally uniForm array, and the co-planar surface-portions of one set being offset with respect to the co-planar surface-portions of the other set, with the common plane of the one set being parallel with the common plane of the other set, and the thickness of the plate in the areas of one set and the thickness of the plate in the areas of the other set differing by about 6100 Angstrom units, whereby substantially all transmission of the zeroth-order of generally all frequencies of visible light is nulled and diverted and distributed into pairs of diffractive first-order spectral images each containing close to one-half of the energy of the so nulled zeroth-order of light, Y. in which combination the phase-grating is operatively juxtaposed to the face of the picture-tube, with the alternating surface-portions thereof arrayed generally parallel to the scan-lines on the picture-tube and at such distance therefrom that the two diffractive spectral images of the information-areas on the picture-surface of the tube will be spaced from each other to the maximum extent possible without overlap.
Claim 5
Dependent Claim
159 words
The below-described combination (Y) of a particulated information-display device and a transmissive diffractive phase-grating (X), X. which phase-grating nulls the transmission of the zeroth-order of generally all frequencies of visible light at least to an extent providing two diffractive first-order spectral images of the original visible light source, with each such diffractive first-order image containing close to one-half of the energy of the so nulled zeroth-order of all the visible light, and the intensity of each such first-order diffractive image being at least substantially as great as the intensity of any un-nulled portion of the zeroth-order transmitted image, Y. in which combination the phase-grating is operatively juxtaposed to such information-display device with the alternating surface portions of the phase-grating oriented in relation to the particulating matrix of the information-display device and at such distance therefrom that the two first-order diffractive spectral images of the particulated information-areas of the information-dosplay device will be substantially spaced from each other without overlap.
Claim 6
Dependent Claim
159 words
The below-described combination (Y) of a particulated information-display device and a transmissive diffractive phase-grating (X), X. which phase-grating nulls the transmission of the zeroth-order of generally all frequencies of visible light at least to an extent providing two diffractive first-order spectral images of the original visible light source, with each such diffractive first-order image containing close to one-half of the energy of the so nulled zeroth-order of all the visible light, and the intensity of each such first-order diffractive image being at least substantially as great as the intensity of any un-nulled portion of the zeroth-order transmitted image, Y. in which combination the phase-grating is operatively juxtaposed to such information-display device with the alternating surface portions of the phase-grating oriented in relation to the particulating matrix of the information-display device and at such distance therefrom that the two first-order diffractive spectral images of the particulated information-areas of the information-dosplay device will be substantially spaced from each other without overlap.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-10-14 | 1978-04-15 | 1978-10-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-10-14 | 1982-04-15 | 1982-10-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-10-14 | 1986-04-15 | 1986-10-15 | $7700.00 | Window Closed / Lapsed |