US3624291A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Optically interlaced scanning and reproducing apparatus using multiple drums to permit scanning of motion picture film or stationary film
Assignee: Olympus Corp
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Filing: 1969-12-29
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Granted: 1971-11-30
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Expires: 1989-12-29
Abstract
Abstract This apparatus uses one or more drums each having a number of small holes or convex lenses for converting a light ray emitted from a light source into light spots each having a small diameter. The light spots are projected onto a scanning raster region through which moves a picture film. A light passed through the film is converted into an electrical signal adapted to be supplied to a conventional television receiver.
Inventors
- 👤 Shoichi Miyata
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 10:18
CPC Classifications
H; H04; H04N; H04N3/00; H04N3/02; H04N3/04; H04N3/36; H04N5/00; H04N5/76; H04N5/84
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
183 words
In an electromechanical interlaced scanning devIce for scanning the pictures of a moving picture film to produce a television signal, in which parallel light is converted into a light beam by means of a rotary drum, the shell of which is provided with a number of small light holes disposed along at least one spiral line about the rotary axis, and by means of a picture-reproducing optical system arranged thereafter, which light beam travels in lines across a picture area containing the moving picture film and is incident on a photoelectrical transducer, the improvement wherein, adjacent the drum, there is provided at least one additional drum, rotating together with the first drum about the same axis of rotation, the light holes of said additional drum being disposed along spiral lines of different number and pitch, as compared to those of the first drum, and wherein the reproducing optical system is positionable between at least first and second positions to selectively coordinate the reproducing optical system with said drum and said additional drum whereby scanning of motion picture film or stationary film is possible.
Claim 2
Dependent Claim
183 words
In an electromechanical interlaced scanning devIce for scanning the pictures of a moving picture film to produce a television signal, in which parallel light is converted into a light beam by means of a rotary drum, the shell of which is provided with a number of small light holes disposed along at least one spiral line about the rotary axis, and by means of a picture-reproducing optical system arranged thereafter, which light beam travels in lines across a picture area containing the moving picture film and is incident on a photoelectrical transducer, the improvement wherein, adjacent the drum, there is provided at least one additional drum, rotating together with the first drum about the same axis of rotation, the light holes of said additional drum being disposed along spiral lines of different number and pitch, as compared to those of the first drum, and wherein the reproducing optical system is positionable between at least first and second positions to selectively coordinate the reproducing optical system with said drum and said additional drum whereby scanning of motion picture film or stationary film is possible.
Claim 3
Dependent Claim
118 words
A picture-scanning device as claimed claim 1, wherein the light holes of said first drum are disposed along a spiral line whose pitch corresponds to the height of the picture area and separated one from the other by a distance in the direction of the drum circumference corresponding to the width of the picture area, in which the light holes of the further drum are disposed at equal distance H'' with respect to each other which is the same as in the first drum along two spiral lines, offset by 180* over the drum circumference, the pitch 2D'' of which are, in each case, twice as high as the pitch of the spiral line of the first drum.
Claim 4
Dependent Claim
45 words
A picture-scanning device as claimed in claim 1, further comprising a third drum (50) which includes light holes disposed along a spiral line, having a pitch of zero and separated one from the other by the same distance H'' as in the other two drums.
Claim 5
Dependent Claim
20 words
A picture-scanning device as claimed in claim 1, in which all said drums have the same number of light holes.
Claim 6
Dependent Claim
31 words
A picture-scanning device as claimed in claim 1, in which the reproducing optical system comprising a lens and a diaphragm movable in the direction of the rotary axis of the drums.
Claim 7
Dependent Claim
64 words
A picture-scanning device, as claimed in claim 1, comprising a collimator lens for generating parallel light, in which the light holes are convex lenses formed on a strip mounted on the shell of each drum, and have a radius of curvature which is smaller than their distance to each other, and in which a circular diaphragm is disposed in front of the collimator lens.
Claim 8
Dependent Claim
38 words
A picture-scanning device as claimed in claim 6, in which the strip is provided at its back with an opaque film having transparent portions behind convex lenses of a diameter corresponding to the effective diameter of the lenses.
References Cited (Backward Citations)
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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) | 1974-11-29 | 1975-05-31 | 1975-11-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-29 | 1979-05-31 | 1979-11-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-29 | 1983-05-31 | 1983-11-30 | $7700.00 | Window Closed / Lapsed |