Optical imaging lens and imaging equipment
An optical imaging lens and lens technology, applied in the field of imaging lenses, can solve problems such as poor target recognition at long distances, poor long-distance imaging, and unclear imaging at the edge of the field of view, achieving large aperture, meeting imaging requirements, and small distortion. Effect
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no. 1 example
[0071] see figure 1 , which is a schematic structural view of the optical imaging lens 100 provided in the first embodiment of the present invention, the optical imaging lens 100 includes in sequence from the object side to the imaging surface along the optical axis: a first lens L1, a second lens L2, and a stop ST , the third lens L3, the fourth lens L4, the fifth lens L5, the sixth lens L6, the seventh lens L7 and the filter G1.
[0072] The first lens L1 has positive refractive power, its object side S1 is concave, and its image side S2 is convex;
[0073] The second lens L2 has negative refractive power, its object side S3 is convex, and its image side S4 is concave;
[0074] The third lens L3 has positive refractive power, its object side S5 is concave, and its image side S6 is convex;
[0075] The fourth lens L4 has positive refractive power, and its object side S7 and image side are both convex;
[0076] The fifth lens L5 has negative refractive power, and its object...
no. 2 example
[0091] see Figure 5 , which is a schematic structural view of the optical imaging lens 200 provided in the second embodiment of the present invention. The structure of the optical imaging lens 200 in this embodiment is roughly the same as that of the optical imaging lens 100 in the first embodiment. The difference lies in: The object side S1 of the first lens of the imaging lens 200 is a concave surface close to a plane (the plane can be regarded as a spherical surface with an infinite radius of curvature), the object side S5 of the third lens is a convex surface, and the object side S7 of the fourth lens is a concave surface. The image side S9 of the five lenses is a convex surface, the third lens L3 is a glass spherical lens, and the parameters such as the distance between the lenses, the radius of curvature, the conic coefficient, and the material are different; wherein, setting a certain surface of the lens as a plane can make The tolerance of the system is better, and th...
no. 3 example
[0103] see Figure 9, which is a schematic structural view of the optical imaging lens 300 provided in the third embodiment of the present invention. The structure of the optical imaging lens 300 in this embodiment is roughly the same as that of the optical imaging lens 100 in the first embodiment, except that: The object side S7 of the fourth lens in the imaging lens 300 is a plane, the image side S9 of the fifth lens is a convex surface, the object side S12 of the seventh lens is a convex surface near the optical axis, and a concave surface away from the optical axis, and the third lens L3 It is a glass spherical lens, and there are differences in parameters such as the distance between lenses, radius of curvature, conic coefficient, and material.
[0104] Table 5 shows relevant parameters of each lens of the optical imaging lens 300 provided in the embodiment of the present invention.
[0105] table 5
[0106]
[0107] The surface coefficients of the aspheric surfaces ...
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