Ether Precision Inc.

Jianhua Wang

Jean-Pierre Lusinchi

Xiaoxiong Qiu

Wanghu Wu

An optical module having an object side and an image side; the module comprising, from the object side to the image side: a first positive meniscus lens having a convergence C1, made of a material having a refractive index Nd1 and an Abbe number Vd1, a second negative meniscus lens having a convergence C2 made of a material having a refractive index Nd2 and an Abbe number Vd2, a third positive meniscus lens having a convergence C3, made of a material having a refractive index Nd3 and an Abbe number Vd3, a fourth negative lens having a convergence C4, made of a material having a refractive index Nd4 and an Abbe number Vd4, wherein: 1.1&#x3c;C1/C&#x3c;1.35 II C1/C2 II&#x3e;2 0.5&#x3c;C1/C3&#x3c;1.1 C1/Vd1&#x3c;&#x3c;5.2 II C2/Vd2 II&#x3c;7 II&#xe5;(Ci/Vdi)II&#x3c;4 with i=1 to 4.

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Suzhou, China

Jianhua Wang