Gesellschaft Fur Strahlenund Umweltforschung Mbh

Gesellschaft Fur Strahlen- Und Unweltforschung Mbh

Bernhard Ruth

Wilhelm Waidelich

Diether Haina

A method for indicating the value of a time varying measurement signal which may contain interference that would lead to a systematic error in the value indication, the method including: providing a representation of the measurement signal; providing a representation of a threshold value with respect to which the representation of the measurement signal has a given polarity when interference is present in the measurement signal; identifying each time period during which the measurement signal representation has the given polarity relative to the threshold value representation; and producing an indication of the value which the measurement signal has outside of each identified time period.

Measurement signal interference elimination

Method and apparatus for determining the velocity of an object in a given direction without contacting the object, by: directing coherent radiation to the object in a direction substantially perpendicular to the given direction to cause radiation to be scattered from the object to produce a speckle pattern exhibiting a speckle spectrum, the speckle pattern at a location spaced from the object having a time dependency which is a function of movement of the object, detecting the speckle pattern intensity at the location spaced from the object, producing a first signal representative of the detected speckle intensity, and producing, from the first signal, a time-dependent intensity signal having a value which is weighted as a function of the frequency of the first signal.

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Munich, Georgia

Bernhard Ruth