HD top optical lens Manufacturers china, including one lens group, two lens groups, diaphragm, filter, lens barrel, pressure ring; one lens group with negative power, including No. 1 lens, No. 2 lens, No. 3 lens , and all are meniscus lenses with negative refractive power and convex surface facing the object surface; the second lens group has positive refractive power, including No. 4 lens, No. 5 lens, No. 6 lens, No. 7 lens; No. 4 lens, No. 5 lens The lenses are all biconvex lenses with positive refractive power; the sixth lens and the seventh lens are both cemented lenses with positive refractive power; the rear surface of the sixth lens and the front surface of the seventh lens are cemented to each other; one lens group, two The lens group is coaxially arranged between the object plane and the image plane from front to back;

The above is a brief introduction to the relevant knowledge of HD top optical lens Manufacturers china.