Optical lens
A technology of optical lens and optical total length, applied in the field of optical lens, to achieve the effect of high infrared imaging quality, high-quality resolution capability, and satisfying imaging requirements
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no. 1 example
[0069] Please refer to figure 1 , which is a schematic structural diagram of the optical lens 100 provided by the first embodiment of the present invention. The optical lens 100 sequentially includes a first lens L1, a diaphragm ST, and a second lens L2 along the optical axis direction from the object side to the imaging surface S9. , the third lens L3 and the infrared filter G1.
[0070] The first lens L1 has a 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 side S2 of the first lens is convex at the near optical axis. Side S1 and like side S2 have inflection points;
[0071] The second lens L2 has negative refractive power, the object side S3 of the second lens is convex, 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 thir...
no. 2 example
[0087] see Figure 5 , shows a schematic structural diagram of the optical lens 200 provided in this embodiment. The optical lens 200 in this embodiment is roughly the same in structure as the optical lens 100 in the first embodiment, except that the first lens has negative light The power, as well as the radius of curvature, lens thickness, and pitch of each lens vary.
[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] Table 4 shows the surface shape coefficients of each aspherical surface of the optical lens 200 in this embodiment.
[0092] Table 4
[0093]
[0094] In this embodiment, the graphs of the astigmatism, distortion and relative illuminance of the optical lens 200 are respectively as follows Image 6 , Figure 7 and Figure 8 shown. Depend on Image 6 It can be seen that the meridional field curvature and the sagittal field curvature of different w...
no. 3 example
[0096] see Figure 9 , shows a schematic structural diagram of the optical lens 300 provided in this embodiment. The optical lens 300 in this embodiment is roughly the same in structure as the optical lens 100 in the first embodiment, and the difference lies in the radius of curvature of each lens, the lens Thickness and spacing vary.
[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 shape coefficients of each aspherical surface of the optical lens 300 in this embodiment.
[0101] Table 6
[0102]
[0103] The graphs of the astigmatism, distortion and relative illuminance of the optical lens 300 are respectively 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 within ±0.4mm, indicating that the asti...
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