High-resolution ultra-wide-angle lens and camera device

Abstract

The present invention provides a high-resolution ultra-wide-angle lens and a camera device, wherein the lens comprises an optical system, and the optical system comprises a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, an eighth lens, a ninth lens, a tenth lens, an eleventh lens, a twelfth lens and a thirteenth lens. The ultra-wide-angle lens of the present invention projects a clear picture and has the characteristics of a large viewing angle and low distortion.

Description

Technical Field

[0001] The present invention relates to the technical field of industrial lenses, and in particular to a high-resolution ultra-wide-angle lens and a camera device. Background Art

[0002] In recent years, with the development of short video and live broadcast industries, the demand and requirements for various lenses have become higher and higher, and the image quality requirements for lenses in the market have also become higher and higher. In many cases, in order to have a wider field of view, the lens field of view angle is required to be larger, but this can easily cause greater lens distortion.

[0003] Therefore, there is an urgent need for a lens that can ensure a sufficiently large field of view angle and a sufficiently small distortion. Summary of the invention

[0004] In order to solve the above problems in the prior art, the present invention provides a high-resolution ultra-wide-angle lens and a camera device, which have the characteristics of large viewing angle and low distortion.

[0005] In order to achieve the above object, the technical solution adopted by the present invention is:

[0006] In a first aspect, the present invention provides a high-resolution ultra-wide-angle lens, comprising an optical system, wherein the optical system comprises a first lens group, an aperture stop, and a second lens group, which are arranged on the same optical axis from the object side to the image side, wherein the first lens group comprises a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, and an eighth lens, which are arranged on the same optical axis from the object side to the image side, and wherein the second lens group comprises a ninth lens, a tenth lens, an eleventh lens, a twelfth lens, and a thirteenth lens, which are arranged on the same optical axis from the object side to the image side;

[0007] The first lens is a meniscus lens with negative optical power, the second lens is a meniscus lens with negative optical power, the third lens is a meniscus lens with negative optical power, the fourth lens is a lens with negative optical power, the fifth lens is a meniscus lens with positive optical power, the sixth lens is a meniscus lens with negative optical power, the seventh lens is a meniscus lens with negative optical power, the eighth lens is a biconvex lens with positive optical power, the ninth lens is a meniscus lens with positive optical power, the tenth lens is a biconcave lens with negative optical power, the eleventh lens is a biconvex lens with positive optical power, the twelfth lens is a meniscus lens with negative optical power, and the thirteenth lens is a biconvex lens with positive optical power.

[0008] The beneficial effects of the present invention are as follows: by using a lens combination of 8 front lenses and 6 rear lenses, the positive and negative optical powers are matched, and the total optical power is reasonably distributed to each lens, ensuring that high imaging quality requirements are achieved, so that the ultra-wide-angle lens projects a clear picture with little distortion.

[0009] Optionally, the fifth lens and the sixth lens, the seventh lens and the eighth lens, the ninth lens and the tenth lens, and the eleventh lens and the twelfth lens are respectively combined into a cemented lens.

[0010] Optionally, the air gap between the first lens and the second lens is 4.5 mm, the air gap between the second lens and the third lens is 4.77 mm, the air gap between the third lens and the fourth lens is 1.86 mm, the air gap between the fourth lens and the fifth lens is 8.13 mm, the air gap between the sixth lens and the seventh lens is 0.21 mm, the air gap between the eighth lens and the aperture stop is 6.01 mm, the air gap between the aperture stop and the ninth lens is 2.02 mm, the air gap between the tenth lens and the eleventh lens is 0.15 mm, the air gap between the twelfth lens and the thirteenth lens is 0.13 mm, and the air gap between the thirteenth lens and the imaging plane is 11.00 mm.

[0011] Optionally, the focal length f1 of the first lens, the focal length f2 of the second lens, the focal length f3 of the third lens, the focal length f4 of the fourth lens, the focal length f5 of the fifth lens, the focal length f6 of the sixth lens, the focal length f7 of the seventh lens, the focal length f8 of the eighth lens, the focal length f9 of the ninth lens, the focal length f10 of the tenth lens, the focal length f11 of the eleventh lens, the focal length f12 of the twelfth lens and the focal length f13 of the thirteenth lens are respectively as follows:

[0012] -95mm <f1<-80mm;

[0013] -53mm <f2<-42mm;

[0014] -53mm <f3<-42mm;

[0015] -18mm <f4<-14mm;

[0016] 11mm <f5<14mm;

[0017] -20mm <f6<-14mm;

[0018] -56mm <f7<-44mm;

[0019] 12mm <f8<18mm;

[0020] 15mm <f9<20mm;

[0021] -15mm <f10<-9mm;

[0022] 10mm <f11<15mm;

[0023] -12mm <f12<-8mm;

[0024] 9mm <f13<12mm。

[0025] Optionally, the first lens, the second lens, the third lens, the fifth lens, the sixth lens, the seventh lens, the eighth lens, the ninth lens, the tenth lens, the eleventh lens and the twelfth lens are all spherical lenses made of glass, and the fourth lens and the thirteenth lens are aspherical lenses.

[0026] In a second aspect, the present invention provides a camera device, comprising a photosensitive component and the lens of the first aspect;

[0027] The lens is mounted on the photosensitive component so that the photosensitive component is suitable for receiving light passing through the optical system and outputting imaging data.

[0028] Among them, the technical effect corresponding to the camera device provided in the second aspect refers to the relevant description of the high-resolution ultra-wide-angle lens provided in the first aspect. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 Schematic diagram of the optical structure of a high-resolution ultra-wide-angle lens according to an embodiment of the present invention;

[0030] Figure 2 A modulation transfer function curve diagram of a high-resolution ultra-wide-angle lens according to an embodiment of the present invention;

[0031] Figure 3 4 is a distortion curve diagram of a high-resolution ultra-wide-angle lens according to an embodiment of the present invention.

[0032] Description of reference numerals:

[0033] A1, first lens; A2, second lens; A3, third lens; A4, fourth lens; A5, fifth lens; A6, sixth lens; A7, seventh lens; A8, eighth lens;

[0034] B9, ninth lens; B10, tenth lens; B11, eleventh lens; B12, twelfth lens; B13, thirteenth lens;

[0035] STO, aperture stop;

[0036] IMA, imaging area. DETAILED DESCRIPTION

[0037] In order to better understand the above technical solution, exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present invention are shown in the accompanying drawings, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided to enable a clearer and more thorough understanding of the present invention and to fully convey the scope of the present invention to those skilled in the art.

[0038] Embodiment 1

[0039] Please refer to Figure 1 A high-resolution ultra-wide-angle lens comprises an optical system, the optical system comprising a first lens group, an aperture stop STO and a second lens group which are arranged on the same optical axis from the object side to the image side, the first lens group comprising a first lens A1, a second lens A2, a third lens A3, a fourth lens A4, a fifth lens A5, a sixth lens A6, a seventh lens A7 and an eighth lens A8 which are arranged on the same optical axis from the object side to the image side, and the second lens group comprising a ninth lens B9, a tenth lens B10, an eleventh lens B11, a twelfth lens B12 and a thirteenth lens B13 which are arranged on the same optical axis from the object side to the image side. Among them, the first lens A1 is a meniscus lens with negative optical power, the second lens A2 is a meniscus lens with negative optical power, the third lens A3 is a meniscus lens with negative optical power, the fourth lens A4 is a lens with negative optical power, the fifth lens A5 is a meniscus lens with positive optical power, the sixth lens A6 is a meniscus lens with negative optical power, the seventh lens A7 is a meniscus lens with negative optical power, the eighth lens A8 is a biconvex lens with positive optical power, the ninth lens B9 is a meniscus lens with positive optical power, the tenth lens B10 is a biconcave lens with negative optical power, the eleventh lens B11 is a biconvex lens with positive optical power, the twelfth lens B12 is a meniscus lens with negative optical power, and the thirteenth lens B13 is a biconvex lens with positive optical power.

[0040] In this embodiment, the fifth lens A5 and the sixth lens A6, the seventh lens A7 and the eighth lens A8, the ninth lens B9 and the tenth lens B10, and the eleventh lens B11 and the twelfth lens B12 are respectively combined into cemented lenses, and chromatic aberration is eliminated by using four cemented lens groups, making the lens structure compact.

[0041] At the same time, the air interval between the first lens A1 and the second lens A2 is 4.5 mm, the air interval between the second lens A2 and the third lens A3 is 4.77 mm, the air interval between the third lens A3 and the fourth lens A4 is 1.86 mm, the air interval between the fourth lens A4 and the fifth lens A5 is 8.13 mm, the air interval between the sixth lens A6 and the seventh lens A7 is 0.21 mm, the air interval between the eighth lens A8 and the aperture stop STO is 6.01 mm, the air interval between the aperture stop STO and the ninth lens B9 is 2.02 mm, the air interval between the tenth lens B10 and the eleventh lens B11 is 0.15 mm, the air interval between the twelfth lens B12 and the thirteenth lens B13 is 0.13 mm, and the air interval between the thirteenth lens B13 and the imaging plane IMA is 11.00 mm.

[0042] In this embodiment, the focal length f1 of the first lens A1, the focal length f2 of the second lens A2, the focal length f3 of the third lens A3, the focal length f4 of the fourth lens A4, the focal length f5 of the fifth lens A5, the focal length f6 of the sixth lens A6, the focal length f7 of the seventh lens A7, the focal length f8 of the eighth lens A8, the focal length f9 of the ninth lens B9, the focal length f10 of the tenth lens B10, the focal length f11 of the eleventh lens B11, the focal length f12 of the twelfth lens B12 and the focal length f13 of the thirteenth lens B13 are as follows:

[0043] -95mm <f1<-80mm;

[0044] -53mm <f2<-42mm;

[0045] -53mm <f3<-42mm;

[0046] -18mm <f4<-14mm;

[0047] 11mm <f5<14mm;

[0048] -20mm <f6<-14mm;

[0049] -56mm <f7<-44mm;

[0050] 12mm <f8<18mm;

[0051] 15mm <f9<20mm;

[0052] -15mm <f10<-9mm;

[0053] 10mm <f11<15mm;

[0054] -12mm <f12<-8mm;

[0055] 9mm <f13<12mm。

[0056] Therefore, by reasonably distributing the optical power of the optical system according to the above ratio, the aberration of the optical system in the wavelength range of 400 to 700 nm can be reasonably corrected and balanced.

[0057] In this embodiment, the first lens A1, the second lens A2, the third lens A3, the fifth lens A5, the sixth lens A6, the seventh lens A7, the eighth lens A8, the ninth lens B9, the tenth lens B10, the eleventh lens B11, and the twelfth lens B12 are all spherical lenses made of glass, which are easy to process and detect, and the fourth lens A4 and the thirteenth lens B13 are aspherical lenses.

[0058] Therefore, two groups of cemented lenses are arranged in the front and rear groups to achromatize, which can better correct the off-axis aberration of the system. Under the condition of ultra-large field of view, it is helpful to balance the spherical aberration and chromatic aberration of each group of lenses, ensuring the realization of high imaging quality requirements, so that the projection picture of the ultra-wide-angle lens is clear and the distortion is small.

[0059] In this embodiment, the parameters of the aspherical lens are shown in Table 1 below:

[0060] Table 1

[0061]

[0062] In this embodiment, the optical parameters of each lens are shown in Table 2 below. The surface numbers in Table 2 are arranged in order from the object side to the image side. When the surface is a plane, the radius is infinite. Among them, the fifth lens A5 and the sixth lens A6, the seventh lens A7 and the eighth lens A8, the ninth lens B9 and the tenth lens B10, and the eleventh lens B11 and the twelfth lens B12 are cemented lenses, so the air interval between the two lenses in the above four groups of lenses is 0 mm, so there is only one surface here, so there are 23 surfaces in total:

[0063] Table 2

[0064]

[0065] Reference Figure 2 and Figure 3 It can be seen that the technical indicators of the optical system provided in this embodiment are as follows:

[0066] (1) Focal length: 3.6mm <f<4.6mm;

[0067] (2) Relative aperture: D / f=1:2.8;

[0068] (3) Field of view: 2w ≥ 112°;

[0069] (4) Distortion: <1.6%;

[0070] (5) Target surface: 2 / 3" CCD (diagonal 11mm);

[0071] (6) Resolution: compatible with 12-megapixel high-resolution CCD industrial cameras;

[0072] (7) Total optical path length ∑≤74mm, optical back intercept L'≥11mm;

[0073] (8) Applicable spectral range: 400nm~700nm.

[0074] Embodiment 2

[0075] This embodiment provides a camera device, including a photosensitive component and a high-resolution ultra-wide-angle lens in Embodiment 1. The lens is mounted on the photosensitive component, so that the photosensitive component is suitable for receiving light passing through the optical system and outputting imaging data.

[0076] In summary, this embodiment provides a high-resolution ultra-wide-angle lens with the characteristics of large viewing angle and low distortion, and a compact structure. In each field of view, different wavelengths can obtain good image quality, low distortion, and small image distortion.

[0077] In the description of the present invention, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0078] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0079] In the present invention, unless otherwise clearly specified and limited, when a first feature is “on” or “below” a second feature, it may be that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Moreover, when a first feature is “above”, “above” or “above” a second feature, it may be that the first feature is directly above or obliquely above the second feature, or it may simply mean that the first feature is higher in level than the second feature. When a first feature is “below”, “below” or “below” a second feature, it may be that the first feature is directly below or obliquely below the second feature, or it may simply mean that the first feature is lower in level than the second feature.

[0080] In the description of this specification, the description of the terms "one embodiment", "some embodiments", "embodiment", "example", "specific example" or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, unless they are contradictory.

[0081] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may alter, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A high-resolution ultra-wide-angle lens, characterized in that: An optical system is included, wherein the optical system includes a first lens group, an aperture stop, and a second lens group which are arranged on the same optical axis from the object side to the image side, wherein the first lens group includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, and an eighth lens which are arranged on the same optical axis from the object side to the image side, and the second lens group includes a ninth lens, a tenth lens, an eleventh lens, a twelfth lens, and a thirteenth lens which are arranged on the same optical axis from the object side to the image side; The first lens is a meniscus lens with negative focal power, the second lens is a meniscus lens with negative focal power, the third lens is a meniscus lens with negative focal power, the fourth lens is a lens with negative focal power, the fifth lens is a meniscus lens with positive focal power, the sixth lens is a meniscus lens with negative focal power, the seventh lens is a meniscus lens with negative focal power, the eighth lens is a biconvex lens with positive focal power, the ninth lens is a meniscus lens with positive focal power, the tenth lens is a biconcave lens with negative focal power, the eleventh lens is a biconvex lens with positive focal power, the twelfth lens is a meniscus lens with negative focal power, and the thirteenth lens is a biconvex lens with positive focal power; Among them, the object-side optical axis areas of the first lens, the second lens, the third lens and the seventh lens are convex and the image-side optical axis areas are concave, the object-side optical axis areas of the fifth lens, the sixth lens, the ninth lens and the twelfth lens are concave and the image-side optical axis areas are convex, and the fourth lens is biconcave in the paraxial zone, and the circumferential area of ​​its object-side surface is convex, and the circumferential area of ​​its image-side surface is concave.

2. The high-resolution ultra-wide-angle lens according to claim 1, characterized in that: The fifth lens and the sixth lens, the seventh lens and the eighth lens, the ninth lens and the tenth lens, and the eleventh lens and the twelfth lens are respectively combined into a cemented lens.

3. The high-resolution ultra-wide-angle lens according to claim 2, characterized in that: The air gap between the first lens and the second lens is 4.5 mm, the air gap between the second lens and the third lens is 4.77 mm, the air gap between the third lens and the fourth lens is 1.86 mm, the air gap between the fourth lens and the fifth lens is 8.13 mm, the air gap between the sixth lens and the seventh lens is 0.21 mm, the air gap between the eighth lens and the aperture stop is 6.01 mm, the air gap between the aperture stop and the ninth lens is 2.02 mm, the air gap between the tenth lens and the eleventh lens is 0.15 mm, the air gap between the twelfth lens and the thirteenth lens is 0.13 mm, and the air gap between the thirteenth lens and the imaging plane is 11.00 mm.

4. The high-resolution ultra-wide-angle lens according to claim 3, characterized in that: The focal length f1 of the first lens, the focal length f2 of the second lens, the focal length f3 of the third lens, the focal length f4 of the fourth lens, the focal length f5 of the fifth lens, the focal length f6 of the sixth lens, the focal length f7 of the seventh lens, the focal length f8 of the eighth lens, the focal length f9 of the ninth lens, the focal length f10 of the tenth lens, the focal length f11 of the eleventh lens, the focal length f12 of the twelfth lens and the focal length f13 of the thirteenth lens are as follows: -95mm <f1<-80mm; -53mm <f2<-42mm; -53mm <f3<-42mm; -18mm <f4<-14mm; 11mm <f5<14mm; -20mm <f6<-14mm; -56mm <f7<-44mm; 12mm <f8<18mm; 15mm <f9<20mm; -15mm <f10<-9mm; 10mm <f11<15mm; -12mm <f12<-8mm; 9mm <f13<12mm。 5. A high-resolution ultra-wide-angle lens according to any one of claims 2 to 4, characterized in that: The first lens, the second lens, the third lens, the fifth lens, the sixth lens, the seventh lens, the eighth lens, the ninth lens, the tenth lens, the eleventh lens and the twelfth lens are all spherical lenses made of glass, and the fourth lens and the thirteenth lens are aspherical lenses.

6. A camera device, characterized in that: Comprising a photosensitive component and the lens according to any one of claims 1 to 5; The lens is mounted on the photosensitive component so that the photosensitive component is suitable for receiving light passing through the optical system and outputting imaging data.

Images