Optical lens
A technology of optical lens and optical total length, which is applied in the field of optical lens to achieve high infrared imaging quality, high-quality resolution capability, and the effect of meeting imaging requirements
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no. 1 example
[0069] Please refer to figure 1 , which is a schematic structural view of the optical lens 100 provided by the first embodiment of the present invention, the optical lens 100 includes in sequence from the object side to the imaging surface S9 along the optical axis: a first lens L1, a stop ST, and a second lens L2 , the third lens L3 and the infrared filter G1.
[0070] The first lens L1 has positive refractive power, the object side S1 of the first lens is concave at the near optical axis and has an inflection point, the image side S2 of the first lens is convex at the near optical axis, and the object of the first lens The side S1 and the image side S2 have inflection points;
[0071] The second lens L2 has negative refractive power, the object side S3 of the second lens is a convex surface, the image side S4 of the second lens is concave at the near optical axis, and its image side S4 has an inflection point;
[0072] The third lens L3 has positive refractive power, the o...
no. 2 example
[0087] see Figure 5 , which is a schematic structural view of the optical lens 200 provided in this embodiment, the structure of the optical lens 200 in this embodiment is roughly the same as that of the optical lens 100 in the first embodiment, the difference is that the first lens has a negative light The focal power, as well as the radius of curvature, lens thickness and spacing of each lens are different.
[0088] The relevant parameters of each lens in the optical lens 200 provided in this embodiment are shown in Table 3.
[0089] table 3
[0090]
[0091] The surface coefficients of each aspheric surface of the optical lens 200 in this embodiment are shown in Table 4.
[0092] Table 4
[0093]
[0094] In this embodiment, the curves of the astigmatism, distortion and relative illuminance of the optical lens 200 are as follows Figure 6 , Figure 7 and Figure 8 shown. Depend on Figure 6 It can be seen that the meridional field curvature and sagittal field...
no. 3 example
[0096] see Figure 9 , which is a schematic structural view of the optical lens 300 provided in this embodiment, the structure of the optical lens 300 in this embodiment is roughly the same as that of the optical lens 100 in the first embodiment, the difference lies in the radius of curvature of each lens, lens The thickness and spacing are different.
[0097] The relevant parameters of each lens in the optical lens 300 provided in this embodiment are shown in Table 5.
[0098] table 5
[0099]
[0100] Table 6 shows the surface coefficients of each aspheric surface of the optical lens 300 in this embodiment.
[0101] Table 6
[0102]
[0103] The curves of the astigmatism, distortion and relative illuminance of the optical lens 300 are as follows Figure 10 , Figure 11 and Figure 12 shown. Depend on Figure 10 It can be seen that the meridional field curvature and sagittal field curvature of different wavelengths are all within ±0.4mm, indicating that the asti...
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