CONTINUOUS SLANTED EDGE FOCUS MEASUREMENTS SYSTEM
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United States of America Patent
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Aug 26, 2021
app pub date -
May 10, 2021
filing date -
Sep 2, 2016
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Abstract
A continuous slanted edge focus measurement system characterizes focus of a camera lens. The measurement system may be used to measure effects on focus on caused by factors such as thermal focal shift, humidity focal shift, focal shift caused by changing parts in the camera, and focal shift by changing the camera design. An accurate measurement system enables camera designers to optimize focus under a variety of different conditions and ensure consistency in the products.
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