Aspherical microlens arrays and fabrication method thereof and applications using the same
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United States of America Patent
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Issued Date -
Mar 29, 2007
app pub date -
Dec 23, 2004
filing date -
Dec 23, 2003
priority date (Note) -
Abandoned
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Abstract
An aspherical microlens arrays comprise a base, and a plurality of aspherical microlens arranged on the base and having different curvature radiuse and conic coefficient respectively, along two orthogonal axes on the base perpendicular to an optical axis, by which a degree of refraction, namely, a numerical aperture can be easily adjusted depending on each axial direction, a spherical aberration can be reduced, and concentration efficiency can be improved. In addition, in case of applying the aspherical microlens arrays to a projection screen, an image sensor, or the like, it is advantageous to improve sensitivity and resolution thereof.
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