Abstract: Embodiments of the disclosure provide a fisheye lens. The fisheye lens can include a first lens group near an object side, a second lens group near an imaging plane, and an aperture diaphragm disposed between the first and second lens groups. The first lens group can include, disposed sequentially from the object side to the imaging plane, a negative meniscus spherical first lens, an aspherical second lens, and an aspherical third lens. The second lens group can include, disposed sequentially from the object side to the imaging plane, a positive meniscus spherical fourth lens, a fifth lens formed of a positive biconvex spherical lens and a negative biconcave spherical lens, and an aspherical sixth lens.

Abstract: Embodiments of the disclosure provide a fisheye lens. The fisheye lens can include a first lens group near an object side, a second lens group near an imaging plane, and an aperture diaphragm disposed between the first and second lens groups. The first lens group can include, disposed sequentially from the object side to the imaging plane, a negative meniscus spherical first lens, an aspherical second lens, and an aspherical third lens. The second lens group can include, disposed sequentially from the object side to the imaging plane, a positive meniscus spherical fourth lens, a fifth lens formed of a positive biconvex spherical lens and a negative biconcave spherical lens, and an aspherical sixth lens.

Abstract: 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<C1/C<1.35 II C1/C2 II>2 0.5<C1/C3<1.1 C1/Vd1<<5.2 II C2/Vd2 II<7 IIå(Ci/Vdi)II<4 with i=1 to 4.

Abstract: 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<C1/C<1.35 II C1/C2 II>2 0.5<C1/C3<1.1 C1/Vd1<<5.2 II C2/Vd2 II<7 IIå(Ci/Vdi)II<4 with i=1 to 4.