Zoom projection lens
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United States of America Patent
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Dec 6, 2022
Grant Date -
Dec 3, 2020
app pub date -
May 20, 2020
filing date -
May 29, 2019
priority date (Note) -
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status (Latency Note)
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Abstract
A zoom projection lens with eleven lens elements is provided. The zoom projection lens sequentially includes a first lens group, a second lens group, a third lens group, an aperture stop, a fourth lens group and a fifth lens group along an optical axis from a screen side to an image source side. The first lens group has a negative refractive power and includes three lens elements. The second lens group has a positive refractive power and includes one lens element. The third lens group has a positive refractive power and includes one lens element. The fourth lens group has a negative refractive power and includes four lens elements. The fifth lens group has a positive refractive power and includes two lens elements. A first lens element in the first lens group is an aspheric lens made of plastic.
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