Projection lens and projection device

Number of patents in Portfolio can not be more than 2000

United States of America Patent

PATENT NO 11422336
APP PUB NO 20210072498A1
SERIAL NO

17010829

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ATTORNEY / AGENT: (SPONSORED)

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Abstract

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The disclosure proposes a projection lens including a first lens group, a second lens group and a third lens group arranged in sequence along an optical axis from a magnification side to a reduction side. The first lens group includes a plurality of lenses having refractive power. The second lens group includes at least one lens having refractive power. The third lens group includes a diaphragm, and a plurality of lenses having refractive power, wherein an intermediate image is formed between the first and third lens groups, and the refractive powers of the first, second and third lens groups are positive, positive, and positive, respectively. A projection device including the above projection lens is also proposed.

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Patent Owner(s)

  • CORETRONIC CORPORATION

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Chen, Yi-Chin Hsin-Chu, TW 18 21
Wei, Ching-Chuan Hsin-Chu, TW 23 50

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