Wide-angle zoom lens system

Number of patents in Portfolio can not be more than 2000

United States of America Patent

PATENT NO 8520316
APP PUB NO 20130163093A1
SERIAL NO

13340686

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Abstract

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A wide-angle zoom lens system includes a first lens group with negative refraction power, a second lens group with positive refraction power, and a third lens group with positive refraction power. The first lens group, the second lens group, and the third lens group move along an optical axis of the zoom lens system in focusing. The wide-angle zoom lens system satisfies the formulas: 0.77<|f2/f1|<1.1; and 0.72/fT<1.08; wherein f1 is the effective focal length of the first lens group, f2 is the effective focal length of the second lens group, L2 is a distance of the second lens group moving from a wide-angle state to a telephoto state, and fT is the effective focal length of the wide-angle zoom lens system in the telephoto state.

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Patent Owner(s)

  • HONG FU JIN PRECISION INDUSTRY (SHENZHEN) CO., LTD.;HON HAI PRECISION INDUSTRY CO., LTD.

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Huang, Hai-Jo New Taipei, TW 36 117
Lee, An-Tze New Taipei, TW 18 52
Liu, Xiao-Na Guangdong, CN 30 102
Peng, Fang-Ying New Taipei, TW 31 104
Wang, Sheng-An New Taipei, TW 39 117

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