Lens module testing device
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United States of America Patent
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Nov 10, 2015
Grant Date -
Oct 30, 2014
app pub date -
Apr 17, 2014
filing date -
Apr 26, 2013
priority date (Note) -
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Abstract
Lens module testing device for testing a lens module includes a testing platform, a light source, a testing board, a sensing element, a processor, a driving element, and a position feedback unit. The light source, the testing board, and the sensing element are arranged in order on the testing platform along an optical axis of the lens module. The lens module is positioned between the testing board and the sensing element. The light source emits testing light to the testing board, and the sensing element senses an image of the testing board and sends the image to the processor. The processor determines whether the testing board is in a focal plane of the lens module, controls the driving element to adjust a position of the testing board relative to the lens module, and obtains position information from the position feedback unit to generate a focal length of the lens module.
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