US3860955A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Color image pickup device
Assignee: Victor Company of Japan Ltd
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Filing: 1973-04-25
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Granted: 1975-01-14
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Expires: 1993-04-25
Abstract
Abstract A color image pickup device comprises a lenticular lens disposed in front of and between the image forming screen of a pickup tube and an object to be televised. A color-resolving stripe filter is disposed in front of the lenticular lens. The transverse width of one group of filter elements of the stripe filter is selected to be twice the pitch of each lens element of the lenticular lens. Furthermore, the positions of the lenticular lens and of the stripe filter relative to the image forming screen are selected so that the optical image of the filter is formed on the image forming screen with a magnification ratio of 1 : 1.
Inventors
- 👤 Takashi Shinozaki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 05:02
CPC Classifications
H; H01; H01J; H01J29/00; H01J29/86; H01J29/89; H01J2229/00; H01J2229/89; H01J2229/893
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
236 words
A color image pickup device comprising: a pickup tube having an image-forming surface at its front face; a multi-lenticular lens disposed at a specific distance in front of the image-forming surface and comprising a plurality of cylindrical lens elements arranged transversely in side-byside positions with a predetermined pitch P, the cylindrical lens elements facing the image-forming surface; a color-resolving stripe filter disposed at a specific distance in front of the lenticular lens and comprising a plurality of groups of filter elements, each group comprising a plurality of filter elements respectively passing light of different wavelengths and disposed successively in a predetermined sequence, which is repeated in all other groups, each group having a predetermined transverse width K which is two times the predetermined pitch P; and an objective lens disposed in front of the color-resolving stripe filter and between said filter and an object to be picked up; the lenticular lens and the color-resolving stripe filter being so arranged and adapted that a first distance between a principal plane at which light rays passing through the focal points of the lenticular lens change their paths of advance to become parallel to the optical axis within the lentIcular lens and the surface of the color-resolving stripe filter facing the lenticular lens is equal to a second distance between a plane passing through the optical centers of all lens elements of the lenticular lens and the image-forming surface.
Claim 2
Dependent Claim
236 words
A color image pickup device comprising: a pickup tube having an image-forming surface at its front face; a multi-lenticular lens disposed at a specific distance in front of the image-forming surface and comprising a plurality of cylindrical lens elements arranged transversely in side-byside positions with a predetermined pitch P, the cylindrical lens elements facing the image-forming surface; a color-resolving stripe filter disposed at a specific distance in front of the lenticular lens and comprising a plurality of groups of filter elements, each group comprising a plurality of filter elements respectively passing light of different wavelengths and disposed successively in a predetermined sequence, which is repeated in all other groups, each group having a predetermined transverse width K which is two times the predetermined pitch P; and an objective lens disposed in front of the color-resolving stripe filter and between said filter and an object to be picked up; the lenticular lens and the color-resolving stripe filter being so arranged and adapted that a first distance between a principal plane at which light rays passing through the focal points of the lenticular lens change their paths of advance to become parallel to the optical axis within the lentIcular lens and the surface of the color-resolving stripe filter facing the lenticular lens is equal to a second distance between a plane passing through the optical centers of all lens elements of the lenticular lens and the image-forming surface.
Claim 3
Dependent Claim
36 words
A color image pickup device as claimed in claim 1 in which the lenticular lens has a thickness such that the surface thereof opposite said lens surface is in intimate contact with the color-resolving stripe filter.
Claim 4
Dependent Claim
59 words
A color image pickup device as claimed in claim 1 in which said first distance is two times the distance between a first focal point of the lenticular lens and said principal plane, and said second distance is two times the distance between a second focal point of the lenticular lens and said plane passing through said optical centers.
References Cited (Backward Citations)
US3582984A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-01-13 | 1978-07-15 | 1979-01-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-01-13 | 1982-07-15 | 1983-01-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-01-13 | 1986-07-15 | 1987-01-14 | $7700.00 | Window Closed / Lapsed |