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Day and night dual-purpose imaging lens
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An imaging lens, dual-purpose technology, applied in the field of imaging lens
Active Publication Date: 2021-04-09
合肥联创光学有限公司
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Abstract
Description
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However, existing imaging lenses are difficult to meet the above requirements
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no. 1 example
[0083] see figure 1 , which is a schematic structural diagram of the day-night imaging lens 100 provided by the first embodiment of the present invention, which includes: a first lens L1, a second lens L2, a third lens L3, a Four lenses L4, a stop ST, a fifth lens L5, a sixth lens L6, a seventh lens L7, and a filter G1.
[0084] The first lens L1 has a negative refractive power, and both the object side S1 and the image side S2 of the first lens are concave;
[0085] The second lens L2 has negative refractive power, the object side S3 of the second lens is concave, and the image side S4 is convex;
[0086] The third lens L3 has positive refractive power, the object side S5 of the third lens is convex, and the image side S6 of the third lens is convex;
[0087] The fourth lens L4 has a positive refractive power, and both the object side S7 and the image side S8 of the fourth lens are convex;
[0088] The fifth lens L5 has a negative refractive power, and the object side S9 a...
no. 2 example
[0102] The structure of the day and night imaging lens 100 in this embodiment is roughly the same as that of the day and night imaging lens in the first embodiment, the difference lies in: the radius of curvature of each lens in the day and night imaging lens 100 of this embodiment , The choice of material is different, and the relevant parameters of each lens are shown in Table 3.
[0103] table 3
[0104]
[0105] The parameters of each lens aspheric surface in this embodiment are shown in Table 4.
[0106] Table 4
[0107] face number K B C D E F S3 -0.099 3.706E-03 4.903E-04 2.501E-05 -2.666E-06 7.472E-07 S4 -2.350 3.218E-04 3.899E-04 2.795E-06 -7.219E-07 5.358E-07 S12 -0.080 6.040E-04 -1.445E-04 5.745E-05 -9.979E-06 5.816E-07 S13 -0.955 2.029E-03 -2.827E-04 9.341E-05 -1.335E-05 6.602E-07
[0108] The field curvature of the day and night imaging lens provided by this embodiment is as follows: Figure 5 As sh...
no. 3 example
[0111] The structure of the day and night imaging lens 100 in this embodiment is roughly the same as that of the day and night imaging lens in the first embodiment, the difference lies in: the radius of curvature of each lens in the day and night imaging lens 100 of this embodiment , The choice of material is different, and the relevant parameters of each lens are shown in Table 5.
[0112] table 5
[0113]
[0114]
[0115] The parameters of each lens aspheric surface in this embodiment are shown in Table 6.
[0116] Table 6
[0117] face number K B C D E F S3 0.023 2.737E-04 -1.454E-05 4.277E-06 -1.974E-06 2.093E-07 S4 -0.837 1.666E-04 -7.655E-06 -2.372E-06 -7.479E-08 5.993E-08 S12 -2.284 9.079E-04 7.407E-05 -8.274E-05 3.615E-05 -4.809E-06 S13 -8.768 3.655E-03 -1.515E-04 1.702E-05 1.586E-05 -3.107E-06
[0118] The field curvature of the day and night imaging lens provided by this embodiment is as follows: Fi...
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Abstract
The invention discloses a day and night dual-purpose imaging lens, which sequentially comprises along an optical axis from an object side to an imaging surface: a first lens with negative focal power, wherein the object side surface and the image side surface of the first lens are both concave surfaces; a second lens with negative focal power, wherein the object side surface of the second lens is a concave surface, and the image side surface of the second lens is a convex surface; a third lens with positive focal power, wherein the object side surface and the image side surface of the third lens are convex surfaces; a fourth lens with positive focal power, wherein the object side surface and the image side surface of the fourth lens are convex surfaces; a diaphragm; a fifth lens with negative focal power, wherein the object side surface and the image side surface of the fifth lens are concave surfaces; a sixth lens with positive focal power, wherein the object side surface and the image side surface of the sixth lens are convex surfaces, and the fifth lens and the sixth lens form a cemented lens; and a seventh lens with positive focal power, wherein the object side surface and the image side surface of the seventh lens are convex surfaces. The applicable spectral ranges of the day and night dual-purpose imaging lens are 435-650 nm and 900-1100 nm. The day and night dual-purpose imaging lens provided by the invention has the characteristics of small size, low lens sensitivity, high imaging quality and the like, and has a day and night dual-purpose function.
Description
technical field [0001] The invention relates to the technical field of imaging lenses, in particular to a day and night imaging lens. Background technique [0002] At present, with the development of automatic driving assistance systems and the intensification of market demand, many countries have successively promulgated relevant policies to promote the development of automatic driving, which has greatly promoted the development of related industries of automatic driving. Key components will also usher in rapid development. [0003] Due to the complex and changeable application environment of automobiles and higher safety performance requirements, higher requirements are placed on the camera lens installed in the automatic driving assistance system, not only to have high-definition imaging quality, but also to ensure different lighting during the day and night High-quality image output under high and low temperature conditions, but also need to have strong environmental ad...
Claims
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Application Information
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