Asia Optical Co., Ltd.

Sintai Optical (shenzhen) Co., Ltd.

Ling-Wei Zhao

Hua-Tang Liu

Fei Han

Bin Liu

Yue-Ye Chen

Fang-Li Ma

An optical system includes an objective lens module, an image inverting module, and an eyepiece module. The objective lens module includes a first lens group, a second lens group, a third lens group, a fourth lens group, and a fifth lens group. The optical system satisfies at least one of the following conditions: 0.45≤LGD/LGD≤0.8; 0.015 mm≤1/fG≤0.045 mm; 0.045 mm≤|1/fG|≤0.07 mm; 0.35≤|fG/fG|≤0.75; 0.15≤fG/f≤1.6; wherein LGD is an effective optical diameter of the fourth lens group, LGD is an effective optical diameter of the first lens group, fGis an effective focal length of the first lens group, fGis an effective focal length of the third lens group, fGis an effective focal length of the fourth lens group, and f is an effective focal length of the objective lens module.

Growing community of inventors

ShenZhen, China

Ling-Wei Zhao