US3576357A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Envelope expansion optics for visual systems with perspective alteration means
Assignee: Link Flight Simulation Corp
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Filing: 1969-04-24
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Granted: 1971-04-27
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Expires: 1989-04-24
Abstract
Abstract The disclosed embodiment of the present invention is an optical system which, when employed with a visual system which alters the apparent perspective of an image, increases the limits of the visual system along a horizontal axis perpendicular to the recorded flight path. The optical system is formed of a pair of anamorphic lens groups, each positioned at respective opposite ends of the visual system to operate on the light rays entering and leaving the visual system. The lens group at the object end of the visual system increases the ratio of height to width of the image being transformed by a predetermined factor. The lens group at the image end of the visual system decreases the ratio of height to width of the image being transformed by the same factor. As a result, all lines which are other than entirely vertical or horizontal are tilted through a greater angle.
Inventors
- 👤 Kenneth Levy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 21:19
CPC Classifications
G; G02; G02B; G02B13/00; G02B13/08
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
139 words
In an image alteration system including optical elements movable to variably displace the apparent viewpoint of said image, optical means for increasing the limits within which said apparent viewpoint may be shifted in a plane transverse to the line along which said image is viewed, said optical means comprising: a. first means fixedly positioned along the axis of said movable optical elements for altering the position of each optical information bit in said image in a direction parallel to one of a pair of mutually orthogonal reference lines by an amount proportional to the distance from the other of said reference lines; and b. second means fixedly positioned along said axis for altering the relationship of the distance from said one reference line to the distance from said other reference line to each information bit by a predetermined factor.
Claim 2
Dependent Claim
139 words
In an image alteration system including optical elements movable to variably displace the apparent viewpoint of said image, optical means for increasing the limits within which said apparent viewpoint may be shifted in a plane transverse to the line along which said image is viewed, said optical means comprising: a. first means fixedly positioned along the axis of said movable optical elements for altering the position of each optical information bit in said image in a direction parallel to one of a pair of mutually orthogonal reference lines by an amount proportional to the distance from the other of said reference lines; and b. second means fixedly positioned along said axis for altering the relationship of the distance from said one reference line to the distance from said other reference line to each information bit by a predetermined factor.
Claim 3
Dependent Claim
23 words
The invention according to claim 1 wherein said first and second means are positioned on the same side of said movable optical elements.
Claim 4
Dependent Claim
14 words
The invention according to claim 2 wherein said predetermined factor is less than unity.
Claim 5
Dependent Claim
125 words
In an image alteration system including optical elements movable to variably displace the apparent viewpoint of said image, optical means for increasing the limits within which said apparent viewpoint may be shifted in a plane transverse to the line along which said image is viewed, said optical means comprising: a. first optical means fixedly positioned along the axis of said movable optical elements on one side thereof and effective to alter the ratio of height to width of the image by a first predetermined factor; b. second optical means fixedly positioned along said axis on the opposite side of said movable elements from said first optical means and effective to alter the ratio of height to width of the image by a second predetermined factor.
Claim 6
Dependent Claim
125 words
In an image alteration system including optical elements movable to variably displace the apparent viewpoint of said image, optical means for increasing the limits within which said apparent viewpoint may be shifted in a plane transverse to the line along which said image is viewed, said optical means comprising: a. first optical means fixedly positioned along the axis of said movable optical elements on one side thereof and effective to alter the ratio of height to width of the image by a first predetermined factor; b. second optical means fixedly positioned along said axis on the opposite side of said movable elements from said first optical means and effective to alter the ratio of height to width of the image by a second predetermined factor.
Claim 7
Dependent Claim
19 words
The invention according to claim 4 wherein said first factor is equal to the inverse of said second factor.
Claim 8
Dependent Claim
18 words
The invention according to claim 4 wherein said first and second optical means each include primitive transformation means.
Claim 9
Dependent Claim
66 words
The invention according to claim 4 wherein said first optical means includes a first anamorphic lens having a magnification less than unity along an axis thereof which is parallel to a width dimension of the image and wherein said second optical means includes a second anamorphic lens having a magnification greater than unity along a magnification axis thereof parallel to the width dimension of the image.
Claim 10
Dependent Claim
65 words
The invention according to claim 4 wherein said first optical means includes a first anamorphic lens having a magnification greater than unity along a power axis thereof parallel to a height dimension of the image, and wherein said second optical means includes a second anamorphic lens having a magnification less than unity along a power axis thereof parallel to the height dimension of the image.
Claim 11
Dependent Claim
113 words
The invention according to claim 4 wherein said first optical means includes a first anamorphic lens having a magnification less than unity along a power axis thereof parallel to a width dimension of the image and a second anamorphic lens having a magnification greater than unity along a power axis thereof parallel to a height dimension of the image, and wherein said second optical means includes a third anamorphic lens having a magnification greater than unity along a power axis thereof parallel to the width dimension of the image and a fourth anamorphic lens having a magnification less than unity along a power axis thereof parallel to the height dimension of the image.
References Cited (Backward Citations)
US2975670A
Cited
US3015988A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-04-26 | 1974-10-26 | 1975-04-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-04-26 | 1978-10-26 | 1979-04-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-04-26 | 1982-10-26 | 1983-04-27 | $7700.00 | Window Closed / Lapsed |