Wide-angle lens and panoramic imaging system including seven lenses of -++-++ refractive powers and a reflective element
A wide-angle lens in the following order from an object side toward an image plane includes: a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, an optical reflecting member, and an optical filter. The first lens has negative refractive power and a concave image side surface. The second lens has negative refractive power and a concave image side surface. The third lens has positive refractive power. The fourth lens has positive refractive power and a concave image side surface. The fifth lens has negative refractive power, a concave object side surface, and a concave image side surface. The sixth lens has positive refractive power, a convex object side surface, and a convex image side surface. The seventh lens has positive refractive power, a convex object side surface, and a convex image side surface. Each of the first lens and the third lens is a spherical lens. One of the second lens and the fourth lens is an aspherical lens, and the other one of the second lens and the fourth lens is a spherical lens. Each of the fifth lens and the sixth lens is spherical lens. The fifth lens and the sixth lens form a cemented lens. The seventh lens is an aspherical lens. A panoramic imaging system is also provided.
JIANGXI LIANCHUANG ELECTRONIC CO., LTD.
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Jiyong Bo Jian Weina
Zeng Gao Han Li