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US3716660A
Expired / Lapsed
US
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Apparatus to improve resolution in a scanned transparancy system
Assignee: CAE Link Corp
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Filing: 1971-06-01
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Granted: 1973-02-13
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Expires: 1991-06-01
Abstract
Abstract Apparatus to improve resolution and decrease distortion in system wherein a video signal is obtained by scanning a transparancy in a manner which requires increased scan speeds as the scanning spot moves away from the center is shown. A radial distortion lens having high axial demagnification decreasing toward the edges is placed between the scanner and transparancy and means are provided to correct the scan so that the combined output of the scanner and lens is the same as the scanner alone, the combined system resulting in a smaller spot size on axis and a decrease in required scanning speed toward the edges.
Inventors
- 👤 D Friedman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 08:40
CPC Classifications
H; H04; H04N; H04N3/00; H04N3/10; H04N3/16; H04N3/22; H04N3/23; H04N3/233; H04N3/2335
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
212 words
In a system wherein video information is developed by radially scanning with a scanning device an image source in accordance with two scan signals, developed by a scan computer, which cause deflection from the center of the device along two mutually perpendicular axes and wherein the scan rate is required to increase as the scan position moves away from the center, apparatus to improve resolution and decrease the scan speed required comprising: a. a radial distortion lens haviNg high axial demagnification decreasing toward the edges placed between the scanning device and the image source; and b. means to correct the scan signals to take into account the distorting effects of said lens, said means comprising: 1. means to square each of the two scan signals; 2. means to sum the two squared scan signals; 3. means to multiply each of said two scan signals by a correction factor to obtain two corrected scan signals; 4. means to square each of said two corrected scan signals; 5. means to sum said two squared corrected scan signals; 6. means to multiply said sum by the transfer function of said radial lens; and 7. means to sum the said multiplied sum, the sum of said squared scan signals and one to obtain said correction factor.
Claim 2
Dependent Claim
212 words
In a system wherein video information is developed by radially scanning with a scanning device an image source in accordance with two scan signals, developed by a scan computer, which cause deflection from the center of the device along two mutually perpendicular axes and wherein the scan rate is required to increase as the scan position moves away from the center, apparatus to improve resolution and decrease the scan speed required comprising: a. a radial distortion lens haviNg high axial demagnification decreasing toward the edges placed between the scanning device and the image source; and b. means to correct the scan signals to take into account the distorting effects of said lens, said means comprising: 1. means to square each of the two scan signals; 2. means to sum the two squared scan signals; 3. means to multiply each of said two scan signals by a correction factor to obtain two corrected scan signals; 4. means to square each of said two corrected scan signals; 5. means to sum said two squared corrected scan signals; 6. means to multiply said sum by the transfer function of said radial lens; and 7. means to sum the said multiplied sum, the sum of said squared scan signals and one to obtain said correction factor.
Claim 3
Dependent Claim
115 words
In a system wherein video information is developed by radially scanning with a scanning device an image source in accordance with two scan signals, developed by a scan computer, which cause deflection from the center of the device along two mutually perpendicular axes and wherein the scan rate is required to increase as the scan position moves away from the center, apparatus to improve resolution and decrease the scan speed required comprising: a. a radial distortion lens haviNg high axial demagnification decreasing toward the edges placed between the scanning device and the image source; and b. means to correct the scan signals to take into account the distorting effects of said lens, said means comprising:
Claim 4
Dependent Claim
115 words
In a system wherein video information is developed by radially scanning with a scanning device an image source in accordance with two scan signals, developed by a scan computer, which cause deflection from the center of the device along two mutually perpendicular axes and wherein the scan rate is required to increase as the scan position moves away from the center, apparatus to improve resolution and decrease the scan speed required comprising: a. a radial distortion lens haviNg high axial demagnification decreasing toward the edges placed between the scanning device and the image source; and b. means to correct the scan signals to take into account the distorting effects of said lens, said means comprising:
Claim 5
Dependent Claim
9 words
means to square each of the two scan signals;
Claim 6
Dependent Claim
9 words
means to square each of the two scan signals;
Claim 7
Dependent Claim
8 words
means to sum the two squared scan signals;
Claim 8
Dependent Claim
8 words
means to sum the two squared scan signals;
Claim 9
Dependent Claim
22 words
The invention according to claim 1 wherein said image source is a transparency and said scanning device is a flying spot scanner.
Claim 10
Dependent Claim
10 words
means to square each of said two corrected scan signals;
Claim 11
Dependent Claim
10 words
means to square each of said two corrected scan signals;
Claim 12
Dependent Claim
9 words
means to sum said two squared corrected scan signals;
Claim 13
Dependent Claim
9 words
means to sum said two squared corrected scan signals;
Claim 14
Dependent Claim
14 words
means to multiply said sum by the transfer function of said radial lens; and
Claim 15
Dependent Claim
14 words
means to multiply said sum by the transfer function of said radial lens; and
Claim 16
Dependent Claim
21 words
means to sum the said multiplied sum, the sum of said squared scan signals and one to obtain said correction factor.
Claim 17
Dependent Claim
21 words
means to sum the said multiplied sum, the sum of said squared scan signals and one to obtain said correction factor.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-02-13 | 1976-08-14 | 1977-02-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-02-13 | 1980-08-14 | 1981-02-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-02-13 | 1984-08-14 | 1985-02-13 | $7700.00 | Window Closed / Lapsed |