Optical bichromatic position finder
First Claim
1. An ultrasonic scanning system, comprising:
- bichromatic screen means having one surface colored with first and second colors, the intensity of said first color varying in a selected manner along a first direction on said surface, and the intensity of said second color varying in a second selected manner along a second direction on said surface oblique to said first direction;
portable ultrasonic transducer means movable with respect to said screen means;
means for causing said transducer means to repeatedly transmit ultrasonic signals through said screen means and to receive ultrasonic signals reflected off an object being scanned and located behind said screen means with respect to said transducer means; and
detector means for measuring the respective intensities of said first and second colors at a point on said colored surface of said screen means corresponding to the lateral position of said ultrasonic transducer means with respect to said screen means.
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Accused Products
Abstract
A method and apparatus for determining the position of a sensor with respect to a color screen are disclosed. The screen is colored with first and second colors in such a way that the intensity of each color varies from a minimum to maximum along a respective direction lying in the plane of the screen, the two respective directions being oblique to each other. As a result, each point on the screen is characterized by a unique pair of color intensities. The sensor is provided with means for measuring the intensity of each color at the point on the colored surface corresponding to the location of the sensor. In one advantageous application of the invention, one surface of a screen is colored as described above, and the screen is placed over an object to be ultrasonically inspected. The ultrasonic scanner is provided with color intensity measurement means and can be made to automatically scan the entire object being tested without intervention by the operator, the resulting data being stored and processed by a microprocessor or other suitable means.
7 Citations
7 Claims
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1. An ultrasonic scanning system, comprising:
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bichromatic screen means having one surface colored with first and second colors, the intensity of said first color varying in a selected manner along a first direction on said surface, and the intensity of said second color varying in a second selected manner along a second direction on said surface oblique to said first direction; portable ultrasonic transducer means movable with respect to said screen means; means for causing said transducer means to repeatedly transmit ultrasonic signals through said screen means and to receive ultrasonic signals reflected off an object being scanned and located behind said screen means with respect to said transducer means; and detector means for measuring the respective intensities of said first and second colors at a point on said colored surface of said screen means corresponding to the lateral position of said ultrasonic transducer means with respect to said screen means. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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Specification