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Large-image-plane wide-angle lens

A wide-angle lens and image plane technology, applied in optical components, optics, instruments, etc., can solve the problems of difficult to take into account wide-angle, difficult development and design, high material cost, etc., to reduce tolerance sensitivity, improve resolution performance, control optics distortion effect

Pending Publication Date: 2020-11-10
舜宇光学(中山)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Existing lenses of this type are difficult to develop and design, and the cost of materials is high, and it is difficult to meet the performance requirements of wide angle and low distortion at the same time

Method used

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  • Large-image-plane wide-angle lens
  • Large-image-plane wide-angle lens
  • Large-image-plane wide-angle lens

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0054] figure 1 It is a diagram schematically showing the structure of a large image area wide-angle lens according to the first embodiment of the present invention.

[0055] In the first embodiment, the effective focal length of the large image area wide-angle lens is f=5.65mm, the aperture value FN0=2.25, and the half-field angle FOV / 2=66.0°. The sixth lens L6 and the seventh lens L7 form a double cemented lens.

[0056] The following Table 2 lists the relevant parameters of each lens of this embodiment, including surface type, radius of curvature, thickness, refractive index of the material, and Abbe number:

[0057] Face number Surface type Radius of curvature thickness Refractive index Abbe number S1 Spherical22.151.201.9220.9 S2 Spherical11.185.24 S3 Aspherical13.002.501.5455.7 S4 Aspherical4.8510.59 S5 Aspherical-8.593.501.5356.1 S6 Aspherical-9.680.10 S7 Spherical14.372.561.9031.4 S8 Spherical298.606.26 S9(Stop) Spherical Infinity0.61 S10 Spherical15.792.771.9220.9 S11 ...

Embodiment approach 2

[0064] Figure 5 It is a schematic diagram showing the structure of a large image area wide-angle lens according to the second embodiment of the present invention.

[0065] In the second embodiment, the effective focal length of the large image area wide-angle lens is f=5.64mm, the aperture value FN0=2.30, and the half field angle FOV / 2=68°. The fifth lens L5, the sixth lens L6 and the seventh lens L7 form a triplet lens.

[0066] The following Table 4 lists the relevant parameters of each lens of this embodiment, including surface type, radius of curvature, thickness, refractive index of the material, and Abbe number:

[0067] surface Surface type Radius of curvature thickness Refractive index Abbe number S1 Spherical22.231.221.9220.9 S2 Spherical11.185.26 S3 Aspherical13.052.481.5455.7 S4 Aspherical4.8510.57 S5 Aspherical-8.673.601.5356.1 S6 Aspherical-9.780.10 S7 Spherical13.682.591.9031.4 S8 Spherical140.556.25 S9(Stop) Spherical Infinity0.67 S10 Spherical18.232.821.8523.8 ...

Embodiment approach 3

[0074] Picture 9 It is a diagram schematically showing the structure of a large image area wide-angle lens according to the third embodiment of the present invention.

[0075] In the third embodiment, the effective focal length of the large image area wide-angle lens is f=5.66mm, the aperture value FN0=2.35, and the half field angle FOV / 2=70°. The sixth lens L6, the seventh lens L7 and the eighth lens L8 form a triplet lens.

[0076] The following Table 6 lists the relevant parameters of each lens of this embodiment, including surface type, radius of curvature, thickness, refractive index of the material, and Abbe number:

[0077]

[0078]

[0079] Table 6

[0080] In this embodiment, the aspheric surface data is shown in Table 7 below, K is the quadric constant of the surface, and A, B, C, D, and E are the fourth, sixth, eighth, tenth, and twelfth order, respectively. Aspheric coefficients of order, fourteenth and sixteenth order:

[0081] Face numberKABCDE S30.033.44E-5-8.82E-...

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Abstract

The invention relates to a large-image-plane wide-angle lens, which comprises a first lens (L1), a second lens (L2), a third lens (L3), a fourth lens (L4), a diaphragm, a fifth lens (L5), a sixth lens(L6), a seventh lens (L7), an eighth lens (L8), a ninth lens (L9) and a tenth lens (L10) which are sequentially arranged along the optical axis from an object side to an image side; the first lens (L1), the second lens (L2), the fifth lens (L5) and the seventh lens (L7) are negative focal power lenses. and the third lens (L3), the fourth lens (L4), the sixth lens (L6), the eighth lens (L8), the ninth lens (L9) and the tenth lens (L10) are positive focal power lenses. The large-image-plane wide-angle lens has wide-angle and low-distortion performances, has a half-field angle of more than 60 degrees, has a temperature automatic compensation function, and does not have virtual focus in a temperature range of 40 DEG C to 85 DEG C.

Description

Technical field [0001] The invention relates to the field of optical imaging, in particular to a large image area wide-angle lens. Background technique [0002] Video conferencing lens is a high-end application scene optical equipment, which requires a large field of view angle, imaging performance of tens of millions of pixels, low-distortion imaging images, and strong environmental adaptability. Existing such lenses are difficult to develop and design, and the material cost is high, and it is difficult to simultaneously meet the performance requirements of wide-angle and low distortion. Summary of the invention [0003] The purpose of the present invention is to solve the above-mentioned problems and provide a wide-angle lens with a large image area. [0004] In order to achieve the object of the present invention, the present invention provides a wide-angle lens with a large image area, which includes a first lens, a second lens, a third lens, a fourth lens, a diaphragm, and a f...

Claims

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Application Information

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IPC IPC(8): G02B13/00G02B13/06G02B13/18
CPCG02B13/0045G02B13/006G02B13/06G02B13/18
Inventor 韦晓鹏周小青
Owner 舜宇光学(中山)有限公司