Patent US6254642B1 successfully refreshed from Google Patents.
US3748019A
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US
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Photographic recording and reproducing method and apparatus utilizing spatial carrier frequencies
Assignee: Agfa Gevaert AG
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Filing: 1971-04-12
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Granted: 1973-07-24
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Expires: 1991-04-12
Abstract
Abstract The picture of an object and a grating are formed on a photosensitive layer, and developed. The developed picture is illuminated and projected through openings of a diaphragm which blocks a direct image. Due to the grating, diffraction orders for imaging the picture are produced so that the grating has the effect of a spatial carrier frequency.
Inventors
- 👤 F Bestenreiner
- 👤 R Deml
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:26
CPC Classifications
G; G02; G02B; G02B27/00; G02B27/42; G02B27/4205; G03; G03B; G03B27/00; G03B27/72; G03B27/73; G03B33/00; G03B35/00; G03B35/18; G03B35/24; G03C; G03C5/00; G03C5/02; G03C7/00; Y; Y10; Y10S; Y10S359/00; Y10S359/90
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
153 words
Photographic recording and reproducing method for color photography, comprising forming on a layer which is photosensitive to white light the picture of an object and three different gratings respectively absorbing three different additive color components, each of said gratings having a sinuSoidal variation; and illuminating and projecting said picture and said three different gratings through an opening while at least partly blocking a direct image, said opening being positioned in such a way that, due to the sinusoidal variation of said gratings, mainly the first diffraction order is produced for imaging said picture so that said gratings have the effect of a low spatial carrier frequency, said three different gratings having different grating constants and the same azimuthal angular position selected in such a way that the power of diffraction of the wavelength range of each color component projects the light in the same direction for all color images; and removing said gratings.
Claim 2
Dependent Claim
153 words
Photographic recording and reproducing method for color photography, comprising forming on a layer which is photosensitive to white light the picture of an object and three different gratings respectively absorbing three different additive color components, each of said gratings having a sinuSoidal variation; and illuminating and projecting said picture and said three different gratings through an opening while at least partly blocking a direct image, said opening being positioned in such a way that, due to the sinusoidal variation of said gratings, mainly the first diffraction order is produced for imaging said picture so that said gratings have the effect of a low spatial carrier frequency, said three different gratings having different grating constants and the same azimuthal angular position selected in such a way that the power of diffraction of the wavelength range of each color component projects the light in the same direction for all color images; and removing said gratings.
Claim 3
Dependent Claim
21 words
The method of claim 1, wherein each of said gratings in an absorption grating and has a sinusoidal variation of density.
Claim 4
Dependent Claim
22 words
The method of claim 1, wherein each of said gratings is a phase grating having a sinusoidal variation of the optical distances.
Claim 5
Dependent Claim
109 words
Photographic recording and reproducing method, comprising the steps of forming the picture of an object on a photosensitive layer having areas of different photosensitivity arranged in the pattern of a grating; developing said layer so as to form on said layer a photographic reproduction of said picture combined with said grating; and illuminating and projecting said photographic reproduction of said picture combined with said grating through an opening while at least partly blocking a direct image, said opening being positioned in such a way that, due to said grating, diffraction orders for imaging said picture are produced so that said grating has the effect of a spatial carrier frequency.
Claim 6
Dependent Claim
109 words
Photographic recording and reproducing method, comprising the steps of forming the picture of an object on a photosensitive layer having areas of different photosensitivity arranged in the pattern of a grating; developing said layer so as to form on said layer a photographic reproduction of said picture combined with said grating; and illuminating and projecting said photographic reproduction of said picture combined with said grating through an opening while at least partly blocking a direct image, said opening being positioned in such a way that, due to said grating, diffraction orders for imaging said picture are produced so that said grating has the effect of a spatial carrier frequency.
Claim 7
Dependent Claim
131 words
Color photographic recording and reproducing method, comprising the steps of forming the picture of an object on a photosensitive layer having three strata which are respectively sensitive to different additive color components and having areas of different photosensitivity arranged in the pattern of a grating so as to form on each of said layers a photographic picture of said object combined with the respective grating; developing said layer; and illuminating and projecting said photographic pictures on said three strata of said photosensitive layer togehter with said gratings through an opening while at least partly blocking a direct image, said opening being positioned in such a way that, due to said gratings, diffraction orders for imaging said picture are produced so that said gratings have the effect of a spatial carrier frequency.
Claim 8
Dependent Claim
131 words
Color photographic recording and reproducing method, comprising the steps of forming the picture of an object on a photosensitive layer having three strata which are respectively sensitive to different additive color components and having areas of different photosensitivity arranged in the pattern of a grating so as to form on each of said layers a photographic picture of said object combined with the respective grating; developing said layer; and illuminating and projecting said photographic pictures on said three strata of said photosensitive layer togehter with said gratings through an opening while at least partly blocking a direct image, said opening being positioned in such a way that, due to said gratings, diffraction orders for imaging said picture are produced so that said gratings have the effect of a spatial carrier frequency.
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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) | 1976-07-23 | 1977-01-22 | 1977-07-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-23 | 1981-01-22 | 1981-07-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-23 | 1985-01-22 | 1985-07-24 | $7700.00 | Window Closed / Lapsed |