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EP0273773A2
Expired / Lapsed
EP
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Image pickup device
Assignee: Victor Company of Japan Ltd
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Filing: 1987-12-30
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Granted: —
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Expires: 2007-12-30
Abstract
Abstract An image pickup device comprises an optical modulator element (3, 53, 103) having a function of storing an optical image information of an optical image which is formed thereon, an imaging lens (1, 51, 121) for making an image formation of an optical image of an object on the optical modulator element, and a device (4-12, 54-57, 73-75, 77, 124-126, 128, 131) for reading the optical image information from the optical modulator element and for generating an image information corresponding to the optical image of the object formed on the optical modulator element.
Inventors
- 👤 Itsuo Takanashi
- 👤 Shintaro Nakagaki
- 👤 Makoto Iwahara
- 👤 Hirohiko Shinonaga
- 👤 Masato Furuya
- 👤 Tsutou Asakura
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-04 00:13
CPC Classifications
H; H04; H04N; H04N5/00; H04N5/30; H04N23/00
Claims Analysis
Total Claims: 31
Claim 1
Independent Claim
101 words
An image pickup device characterized in that there are provided: an optical modulator element (3, 53, 103) having a function of storing an optical image information of an optical image which is formed thereon; imaging means (1, 2, 121) including an imaging lens (1, 121) for making an image formation of an optical image of an object on said optical modulator element; and reading means (4-12, 15-18, 124-126, 128, 131) for reading an optical image information from said optical modulator element and for generating an image information corresponding to the optical image of the object formed on said optical modulator element.
Claim 2
Dependent Claim
101 words
An image pickup device characterized in that there are provided: an optical modulator element (3, 53, 103) having a function of storing an optical image information of an optical image which is formed thereon; imaging means (1, 2, 121) including an imaging lens (1, 121) for making an image formation of an optical image of an object on said optical modulator element; and reading means (4-12, 15-18, 124-126, 128, 131) for reading an optical image information from said optical modulator element and for generating an image information corresponding to the optical image of the object formed on said optical modulator element.
Claim 3
Dependent Claim
53 words
An image pickup device as claimed in claim 1, characterized in that said optical modulator element (3, 53, 103) is selected from a group including a liquid crystal optical modulator, a photoconductive Pockels cell, a spatial light modulator element such as a microchannel light modulator, and an element constituted by a photochromic material.
Claim 4
Dependent Claim
40 words
An image pickup device as claimed in claim 1, characterized in that said optical modulator element (3, 53, 103) is made of a recording material selected from a group including a photochromic material, a thermoplastic film and a photomagnetic material.
Claim 5
Dependent Claim
71 words
An image pickup device as claimed in claim 1, characterized in that said optical modulator element (3, 53) comprises in sequence a first transparent electro-conductive electrode layer (32), a photoconductive layer (34), a stopper layer (35), a dielectric mirror (36), a nematic liquid crystal layer (37) and a second transparent electro-conductive electrode layer (33), said first transparent electro-conductive electrode layer receiving a light from said imaging means as a writing light.
Claim 6
Dependent Claim
45 words
An image pickup device as claimed in any of claims 1 to 4, characterized in that said reading means comprises an optical scanner (7) for scanning said optical modulator element by a reading light when reading the optical image information from said optical modulator element.
Claim 7
Dependent Claim
86 words
An image pickup device as claimed in claim 5, characterized in that said optical modulator element (3, 53) comprises in stacked sequence a first transparent electro-conductive electrode layer (32), a photoconductive layer (34), a stopper layer (35), a dielectric mirror (36), a nematic liquid crystal layer (37) and a second transparent electro-conductive electrode layer (33), said first transparent electro-conductive electrode layer receiving a light from said imaging means as a writing light, said second transparent electro-conductive electrode layer receiving the reading light from said optical scanner.
Claim 8
Dependent Claim
96 words
An image pickup device as claimed in claim 1, characterized in that said optical modulator element (103) comprises in stacked sequence a first transparent electro-conductive electrode layer (110), a photoconductive layer (111), a mirror (112), an optical modulator layer (113) and a second transparent electro-conductive electrode layer (114), said first transparent electro-conductive electrode layer receiving a light from said imaging means as a writing light, said mirror having a predetermined spectral characteristic for selectively reflecting a light which has a wavelength greater than a predetermined wavelength and is projected to said second transparent electro-conductive electrode layer.
Claim 9
Dependent Claim
113 words
An image pickup device as claimed in claim 1, characterized in that said reading means comprises means (4-8, 124-126) for reading the optical image information from said optical modulator element by a reading light, said optical modulator element (103) comprising in stacked sequence a first transparent electro-conductive electrode layer (110), a photoconductive layer (111), a mirror (112), an optical modulator layer (113)and a second transparent electro-conductive electrode layer (114), said first transparent electro-conductive electrode layer receiving a light from said imaging means as a writing light, said second transparent electro-conductive electrode layer receiving the reading light from said optical scanner, said mirror having a predetermined spectral characteristic for selectively reflecting the reading light.
Claim 10
Dependent Claim
63 words
An image pickup device as claimed in claim 8, characterized in that there is further provided a light source (13) for supplying an erasing light, said erasing light being applied to said second transparent electro-conductive electrode layer when erasing the optical image information stored in said optical modulator element, said mirror allowing to pass the erasing light thereby making said photoconductive layer conductive.
Claim 11
Dependent Claim
26 words
An image pickup device as claimed in claim 9, characterized in that said reading light has a wavelength shorter than a wavelength of said erasing light.
Claim 12
Dependent Claim
54 words
An image pickup device as claimed in any of claims 1 to 10, characterized in that said reading means comprises photoelectric conversion means (11) for converting the optical image information read from said optical modulator element into an electrical signal corresponding to the optical image of the object formed on said optical modulator element.
Claim 13
Dependent Claim
25 words
An image pickup device as claimed in any of claims 1 to 11, characterized in that said imaging means further comprises an optical shutter (2).
Claim 14
Dependent Claim
135 words
An image pickup device characterized in that there are provided: an optical modulator element (53, 103); imaging means (51, 52, 121) including an imaging lens (51, 121) for making an image formation of an optical image of an object on said optical modulator element; reading means (54-57, 73-75, 77, 124-126) for reading a first optical image information from said optical modulator element and for generating a second optical image information corresponding to the optical image of the object formed on said optical modulator element; flexible optically sensitive rewritable means (60) having a function of storing said second optical image information which is formed thereon; and writing means (54, 58, 59, 72, 73, 75, 76, 124, 128) for writing said second optical image information generated from said reading means on said flexible optically sensitive rewritable means.
Claim 15
Dependent Claim
135 words
An image pickup device characterized in that there are provided: an optical modulator element (53, 103); imaging means (51, 52, 121) including an imaging lens (51, 121) for making an image formation of an optical image of an object on said optical modulator element; reading means (54-57, 73-75, 77, 124-126) for reading a first optical image information from said optical modulator element and for generating a second optical image information corresponding to the optical image of the object formed on said optical modulator element; flexible optically sensitive rewritable means (60) having a function of storing said second optical image information which is formed thereon; and writing means (54, 58, 59, 72, 73, 75, 76, 124, 128) for writing said second optical image information generated from said reading means on said flexible optically sensitive rewritable means.
Claim 16
Dependent Claim
52 words
An image pickup device as claimed in claim 13, characterized in that said optical modulator element (53, 103) is selected from a group including a liquid crystal optical modulator, a photoconductive Pockels cell, a spatial light modulator element such as a microchannel light modulator, and an element constituted by a photochromic material.
Claim 17
Dependent Claim
40 words
An image pickup device as claimed in claim 13, characterized in that said flexible optically sensitive rewritable means (60) is made of a recording material selected from a group including a photochromic material, a thermoplastic film and a photomagnetic material.
Claim 18
Dependent Claim
71 words
An image pickup device as claimed in claim 13, characterized in that said optical modulator element (53) comprises in stacked sequence a first transparent electro-conductive electrode layer (32), a photoconductive layer (34), a stopper layer (35), a dielectric mirror (36), a nematic liquid crystal layer (37) and a second transparent electro-conductive electrode layer (33), said first transparent electro-conductive electrode layer receiving a light from said imaging means as a writing light.
Claim 19
Dependent Claim
37 words
An image pickup device as claimed in claim 13, characterized in that said reading means comprises means (54-57, 73-75, 77, 124-126) for reading the first optical image information from said optical modulator element by a reading light.
Claim 20
Dependent Claim
81 words
An image pickup device as claimed in claim 17, characterized in that said optical modulator element (53) comprises in stacked sequence a first transparent electro-conductive electrode layer (32), a photoconductive layer (34), a stopper layer (35), a dielectric mirror (36), a nematic liquid crystal layer (37) and a second transparent electro-conductive electrode layer (33), said first transparent electro-conductive electrode layer receiving a light from said imaging means as a writing light, said second transparent electro-conductive electrode layer receiving the reading light.
Claim 21
Dependent Claim
110 words
An image pickup device as claimed in claim 13, characterized in that said optical modulator element (110) comprises in stacked sequence a first transparent electro-conductive electrode layer (110), a photoconductive layer (111), a mirror (112), an optical modulator layer (113) and a second transparent electro-conductive electrode layer (114), said first transparent conductive electrode layer receiving a light from said imaging means as a writing light, said second transparent electro-conductive electrode layer receiving a reading light, said mirror having a predetermined spectral characteristic for selectively reflecting a light which has a wavelength greater than a predetermined wavelength and is projected to said second transparent electro-conductive electrode layer as the reading light.
Claim 22
Dependent Claim
64 words
An image pickup device as claimed in claim 19, characterized in that there is further provided a light source (130) for supplying an erasing light, said erasing light being projected to said second transparent electro-conductive electrode layer when erasing the first optical image information stored in said optical modulator element, said mirror allowing to pass the erasing light thereby making said photoconductive layer conductive.
Claim 23
Dependent Claim
26 words
An image pickup device as claimed in claim 20, characterized in that said reading light has a wavelength shorter than a wavelength of said erasing light.
Claim 24
Dependent Claim
32 words
An image pickup device as claimed in claim 13, characterized in that there is further provided a color separation stripe filter (F) provided between said imaging lens and said optical modulator element.
Claim 25
Dependent Claim
51 words
An image pickup device as claimed in claim 22, characterized in that said writing means writes the second optical image information generated by said reading means on said flexible optically sensitive rewritable means as a hologram of the optical image subjected to a color separation in said color separation stripe filter.
Claim 26
Dependent Claim
62 words
An image pickup device as claimed in any of claims 13 to 21, characterized in that there is further provided a color separation system (CSS) for separating the optical image information from said imaging lens into two or more optical images of mutually different wavelengths, said two or more optical images being formed respectively at independent regions on said optical modulator element.
Claim 27
Dependent Claim
59 words
An image pickup device as claimed in claim 24, characterized in that lengths of optical paths from a principal plane of said imaging lens to respective image formations of optical images formed by primary color components of light are identical each other and the image formations are arranged side by side on a single plane without overlapping each other.
Claim 28
Dependent Claim
25 words
An image pickup device as claimed in any of claims 13 to 25, characterized in that said imaging means further comprises an optical shutter (52).
Claim 29
Dependent Claim
107 words
An image pickup device characterized in that there are provided: flexible optically sensitive rewritable means (60) having a function of storing an optical image information of an optical image which is formed thereon; imaging means (1, 2) including an imaging lens for making an image formation of an optical image of an object on said flexible optically sensitive rewritable means; and reading means (11, 15-18) for reading the optical image information from said flexible optically sensitive rewritable means and for generating an image information in a form of an electrical signal corresponding to the optical image of the object formed on said flexible optically sensitive rewritable means.
Claim 30
Dependent Claim
107 words
An image pickup device characterized in that there are provided: flexible optically sensitive rewritable means (60) having a function of storing an optical image information of an optical image which is formed thereon; imaging means (1, 2) including an imaging lens for making an image formation of an optical image of an object on said flexible optically sensitive rewritable means; and reading means (11, 15-18) for reading the optical image information from said flexible optically sensitive rewritable means and for generating an image information in a form of an electrical signal corresponding to the optical image of the object formed on said flexible optically sensitive rewritable means.
Claim 31
Dependent Claim
40 words
An image pickup device as claimed in claim 27, characterized in that said flexible optically sensitive rewritable means (60) is made of a recording material selected from a group including a photochromic material, a thermoplastic film and a photomagnetic material.
References Cited (Backward Citations)
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