Xiaohua Zhang — Lens Patent Author | Surface & Stop

Xiaohua Zhang3 related patents across 3 interactive lens diagrams.
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Anhui Changgeng Optics Technology Co., Ltd. (3)
Anhui Changgeng Optics Technology Co., Ltd.(3)CN 205427291 U↗2016Assignee: Anhui Changgeng Optics Technology Co., Ltd.
Inventors: Xiaohua Zhang
LAOWA 15mm f/4 Wide Angle 1:1 Macro— 12 ELEMENTS / 9 GROUPS, f = 16.00 mm
CN 205720849 U↗2016Assignee: Anhui Changgeng Optics Technology Co., Ltd.
Inventors: Xiaohua Zhang
LAOWA 12mm f/2.8 Zero-D— 16 elements / 10 groups, Design f = 12.4999 mm
US 2018/0149842 A1↗2018Assignee: Anhui Changgeng Optics Technology Co., Ltd.
Inventors: Xiaohua Zhang
LAOWA 15mm f/2 Zero-D— Patent Example 1, 12 elements / 9 groups