Apparatus and method for determining centering data for spectacles
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United States of America Patent
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Jun 10, 2008
Grant Date -
Feb 15, 2007
app pub date -
Jul 12, 2006
filing date -
Jan 16, 2004
priority date (Note) -
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Abstract
An apparatus (3) for determining centering data for eyeglasses (2) comprises a fixation device (5) and a recording unit (4) that can be triggered by a computer, records electronic images, and is disposed behind a divider element (8). The fixation device (5) produces at least one speckle pattern. The speckles can be superposed by different patterns, for example, a cross shape. The invention further relates to a method for determining centering data. The inventive method and apparatus allow to measure for test persons having the most different acuity of vision the relative centering data from a short distance while maintaining their usual posture.
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