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Patent US4461570A successfully refreshed from Google Patents.
US4461570A
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Method for dynamically recording distortion in a transparency
Assignee: United States, UNITED STATES AIR FORCE, Secretary of
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Filing: 1982-06-09
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Granted: 1984-07-24
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Expires: 2002-06-09
Abstract
Abstract A method for dynamically recording distortion in a transparency includes a support fixture for mounting the transparency for movement about a predetermined horizontal or vertical axis, with a camera disposed in back of the transparency while a test target is disposed in front of it. The test target has a plurality of small light sources arranged in a rectangular matrix pattern toward which the camera is aimed through the transparency. By opening the camera shutter for a period of time as the transparency is moved through a predetermined angle, a photographic record of distortion at a plurality of regions in the transparency is produced.
Inventors
- 👤 Harry L. Task
- 👤 Louis V. Genco
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 01:27
CPC Classifications
G; G01; G01N; G01N21/00; G01N21/84; G01N21/88; G01N21/95; G01N21/958; G01M; G01M11/00; G01N2021/9586
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
139 words
A method for dynamically recording distortion in a transparency, comprising the steps of: (a) mounting said transparency for movement about a predetermined axis; (b) disposing a test target at one side of said transparency, said test target having a plurality of small target elements mounted thereon in a predetermined array; (c) disposing a camera at a side of said transparency opposite to said one side thereof; (d) aiming said camera toward said test target so as to place said array of target elements within its field of view through said transparency; and (e) operating said camera in a time exposure mode for a predetermined period of time as said transparency is moved through a predetermined angle over the same period of time such that a photographic record of distortion at a plurality of regions in said transparency is produced.
Claim 2
Independent Claim
139 words
A method for dynamically recording distortion in a transparency, comprising the steps of: (a) mounting said transparency for movement about a predetermined axis; (b) disposing a test target at one side of said transparency, said test target having a plurality of small target elements mounted thereon in a predetermined array; (c) disposing a camera at a side of said transparency opposite to said one side thereof; (d) aiming said camera toward said test target so as to place said array of target elements within its field of view through said transparency; and (e) operating said camera in a time exposure mode for a predetermined period of time as said transparency is moved through a predetermined angle over the same period of time such that a photographic record of distortion at a plurality of regions in said transparency is produced.
Claim 3
Dependent Claim
21 words
The dynamic distortion recording method as recited in claim 1, wherein said predetermined axis is aligned in a generally horizontal direction.
Claim 4
Dependent Claim
21 words
The dynamic distortion recording method as recited in claim 1, wherein said predetermined axis is aligned in a generally vertical direction.
Claim 5
Dependent Claim
25 words
The dynamic distortion recording method as recited in claim 1, wherein said camera is disposed generally at the predetermined axis of movement of said transparency.
Claim 6
Dependent Claim
23 words
The dynamic distortion recording method as recited in claim 1, wherein said camera is disposed at a design eye position of said transparency.
Claim 7
Dependent Claim
29 words
The dynamic distortion recording method as recited in claim 1, wherein said plurality of small target elements comprises a plurality of light sources arranged in a rectangular matrix pattern.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-07-24 | 1988-01-23 | 1988-07-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-07-24 | 1992-01-23 | 1992-07-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-07-24 | 1996-01-23 | 1996-07-24 | $7700.00 | Window Closed / Lapsed |