LENS MODULE AND TEMPERATURE-COMPENSATING METHOD THEREOF
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United States of America Patent
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Issued Date -
Jan 26, 2012
app pub date -
Dec 2, 2010
filing date -
Jul 21, 2010
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Abandoned
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Abstract
Embodiments of the present invention disclose a lens module and its temperature-compensating method. The lens module primarily includes several lenses and a compensating lens. The several lenses comprise two plastic lenses and the ratio of the focal length of one plastic lens to the other is predetermined. The temperature-compensating method employs the compensating lens to shift alone an optical axis for compensation of the focal length departure. In one embodiment, the ratio of the two focal lengths is more than or equal to 0.5 and less than or equal to 2.
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