JCIPRNET
Optical lens
An optical lens including a first lens group and a second lens group is provided. The first lens group is disposed between a magnified side and a reduced side and has a negative refractive power. The first lens group includes four lenses. Two lenses closest to the magnified side in the first lens group are aspheric lenses. The second lens group is disposed between the first lens group and the reduced side and has a positive refractive power. The second lens group includes at least seven lenses.
Young Optics Inc.
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G02B G02B G02B G02B G02B
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Ching-Sheng Yen-Te Kuo-Chuan
Chang Lee Wang