Display analyzer having angular degrees of freedom
First Claim
1. A display analyzer for analyzing an image from a unit under test, comprising:
- a detection means having a given field of view for producing a viewing signal responsive to the image size and brightness within said field of view, said viewing signal being produced with a predetermined characteristic in response to the appearance of a given image at the center of said field of view;
supporting means for adjustably supporting said detection means, said supporting means having at least two degrees of linear freedom and two degrees of angular freedom, the direction of said given field of view being angularly movable into alignment with said image of said unit under test; and
analyzing means connected to said detection means for producing a supporting means adjustment signal, said supporting means being operable to move in response to said adjustment signal, said analyzing means being operable to produce information in response to production of said viewing signal.
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Accused Products
Abstract
A display analyzer analyzes an image from a unit (10) under test. The analyzer has a carriage (18, 20) for adjustably supporting a detection device (16). The carriage has at least two degrees of freedom. The detection device has a given field of view and can produce a viewing signal responsive to the image size and brightness within the field of view. This viewing signal is produced with a predetermined characteristic in response to the appearance of a given image at the center of said field of view. The display analyzer also has an analyzing device (50) for producing a carriage adjustment signal. The carriage is operable to move in response to this adjustment signal. The analyzing device is operable to produce information in response to the production of the viewing signal.
19 Citations
16 Claims
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1. A display analyzer for analyzing an image from a unit under test, comprising:
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a detection means having a given field of view for producing a viewing signal responsive to the image size and brightness within said field of view, said viewing signal being produced with a predetermined characteristic in response to the appearance of a given image at the center of said field of view; supporting means for adjustably supporting said detection means, said supporting means having at least two degrees of linear freedom and two degrees of angular freedom, the direction of said given field of view being angularly movable into alignment with said image of said unit under test; and analyzing means connected to said detection means for producing a supporting means adjustment signal, said supporting means being operable to move in response to said adjustment signal, said analyzing means being operable to produce information in response to production of said viewing signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A method for analyzing a display image from a unit under test with the output signal of a detection device having a given field of view, comprising the steps of:
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moving said detection device into a given position and measuring the position of said detection device; determining if the output signal of said detection device satisfies a selectable standard when said detection device is stationary; and altering the angular position of said detection device with respect to said image. - View Dependent Claims (14, 15)
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16. A display analyzer for analyzing an image from a unit under test, comprising:
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a detection means for scanning a given field of view to produce a video signal, said video signal varying in time to represent the intensity of picture elements within said field of view, said video signal having a given waveshape in response to the appearance of a given image in the center of said field of view, said detection means having sufficient resolution to detect said given image; supporting means for adjustably supporting said detection means, said supporting means having at least two angular and two linear degrees of freedom; two position transducers for measuring displacement with respect to said two angular degrees of freedom and two other position transducers for measuring displacement with respect to said two linear degrees of freedom, the transducers producing four transducer signals signifying said displacement; a projector means for projecting a visual reference target before said detection means; and analyzing means for producing a supporting means adjustment signal, said supporting means being operable to move in response to said adjustment signal, said analyzing means being operable to produce information in response to production of said given waveshape when the values of said transducer signals are within a given range.
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Specification