CN217718228U - Telephoto type large aperture optical lens - Google Patents
Telephoto type large aperture optical lens Download PDFInfo
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- CN217718228U CN217718228U CN202221026175.6U CN202221026175U CN217718228U CN 217718228 U CN217718228 U CN 217718228U CN 202221026175 U CN202221026175 U CN 202221026175U CN 217718228 U CN217718228 U CN 217718228U
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Abstract
The utility model relates to a telephoto type large aperture optical lens, which comprises a first lens, a second lens, a third lens, a fourth lens, a fifth lens and a sixth lens which are arranged along a light incident light path from left to right in sequence; the first lens is a positive meniscus lens, the second lens is a negative meniscus lens, the third lens is a double-concave negative lens, the fourth lens is a double-convex positive lens, the fifth lens is a double-convex positive lens, and the sixth lens is a negative meniscus lens; the utility model has an effective focal length of more than 15mm, and can accurately identify and image remote objects; the small F number design is adopted, the clear aperture of the system is larger, and the picture brightness performance is better; the imaging target surface is large, the peripheral brightness ratio is more than 80%, and the imaging can be carried out in an image surface area with the diameter of 9.2mm with uniform illumination; the imaging quality is excellent, the axial aberration of the full working wave band is less than 0.05mm, the maximum transverse aberration is less than 4 mu m, high-frequency space information can be effectively reserved, and the full working wave band high-resolution CMOS camera can be adapted to 4K and above high-resolution high-definition camera CMOS.
Description
The technical field is as follows:
the utility model relates to a big light ring optical lens of type of taking a photograph of a section.
The background art comprises the following steps:
nowadays, the development trend of vehicle-mounted lenses is ultra-high definition, ultra-wide angle and large target surface, and the purpose is to form a more comprehensive and higher-quality motor vehicle visual field; the requirement of the front and rear view vehicle-mounted lens on imaging quality is generally higher, because the current mainstream algorithm needs to judge distance according to the size of an image formed by an object, the strength of the resolving power of an optical system has great value for guaranteeing driving safety; however, the aperture of the front group of a general telephoto lens is large, and is not suitable for being applied to a vehicle-mounted scene, so how to simultaneously meet the technical requirements of high image quality, small size, large aperture, telephoto and the like has become a great technical problem faced by current lens manufacturers.
Disclosure of Invention
In view of the deficiency of the prior art, the utility model aims to solve the technical problem that a type of taking a photograph big light ring optical lens is provided, and this camera lens can satisfy the technical requirement of high image quality, small-size, big light ring, long burnt simultaneously.
In order to solve the technical problem, the technical scheme of the utility model is that: the telephoto type large aperture optical lens comprises a first lens, a second lens, a diaphragm, a third lens, a fourth lens, a fifth lens, a sixth lens, an equivalent glass plate and an IMA imaging surface which are sequentially arranged from an object side to an image side along a light incident path; the first lens is a positive meniscus lens, the second lens and the sixth lens are negative meniscus lenses, and object planes and image planes of the first lens, the second lens and the sixth lens are convex towards the object side; the third lens is a double-concave negative lens; the fourth lens and the fifth lens are double convex positive lenses; the third lens and the fourth lens are mutually bonded into a meniscus lens; the optical lensThe focal length of the optical system of the head is f, and the focal lengths of the first lens, the second lens, the third lens, the fourth lens, the fifth lens and the sixth lens are respectively f1、f2、f3、f4、f5、f6Wherein f is1、f2、f5、f6And f satisfy the following ratio: 0.74<f1/f<0.91，-1.5<f2/f<-0.5，0.1<f5/f<1.8，-4.3<f6/f<-2.1。
Preferably, the first lens satisfies the relation: n is a radical of hydrogend≥1.5，VdLess than or equal to 50.0; the second lens satisfies the relation: n is a radical ofd≥1.5，VdLess than or equal to 50.0; the third lens satisfies the relation: n is a radical of hydrogend≥1.5，VdLess than or equal to 50.0; the fourth lens satisfies the relation: n is a radical ofd≥1.5，VdNot less than 50.0; the fifth lens satisfies the relation: n is a radical ofd≥1.5，VdNot less than 50.0; the sixth lens satisfies the relation: n is a radical ofd≥1.5，VdLess than or equal to 50.0; wherein N isdIs refractive index, VdAbbe constant.
Preferably, the second lens and the sixth lens are aspheric lenses, and the aspheric curve equation expression is as follows:
wherein Z is the distance from the vertex of the aspheric surface to the aspheric surface when the aspheric surface is at the position with the height of h along the optical axis direction; c is the paraxial curvature of the aspheric surface; k is a conic constant; alpha is alpha1、α2、α3、α4、α5、α6、α7、α8Are all high-order term coefficients.
Preferably, the total optical length TTL of the optical system and the focal length f of the optical system satisfy: TTL/f is less than or equal to 1.93.
Preferably, the F number of the optical system is less than or equal to 1.41; the half image height ImaH of the optical system and the focal length f of the optical system meet the following conditions: imaH/f is more than or equal to 0.31.
Compared with the prior art, the utility model discloses following beneficial effect has:
(1) The effective focal length is more than 15mm, and the long-distance object can be accurately identified and imaged;
(2) The small F number design is adopted, the clear aperture of the system is larger, and the picture brightness performance is better;
(3) The imaging target surface is large, the peripheral brightness ratio is more than 80%, and the imaging can be carried out in an image surface area with the diameter of 9.2mm with uniform illumination;
(4) The imaging quality is excellent, the axial aberration of the whole working waveband is less than 0.05mm, the maximum transverse aberration is less than 4 mu m, high-frequency spatial information can be effectively reserved, and the imaging system can be adapted to a high-resolution high-definition camera CMOS (complementary metal oxide semiconductor) with the resolution of 4K or more;
(5) The imaging stability is high by adopting a full-glass structure design, and the imaging device can normally work within a temperature range of-40 ℃ to 105 ℃; the surface shape and the structure are reasonable in design, the tolerance sensitivity of the whole optical system is low, and the method is suitable for large-scale high-yield production.
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
Description of the drawings:
fig. 1 is a schematic view of an optical structure according to a first embodiment of the present invention;
fig. 2 is an axial chromatic aberration diagram of an operating band according to a first embodiment of the present invention;
fig. 3 is a vertical axis chromatic aberration diagram of an operating waveband according to a first embodiment of the present invention;
fig. 4 is a field curvature distortion diagram of the working band according to the first embodiment of the present invention;
fig. 5 is a schematic view of an optical structure according to a second embodiment of the present invention;
fig. 6 is an axial chromatic aberration diagram of the operating band according to the second embodiment of the present invention;
fig. 7 is a vertical axis chromatic aberration diagram of an operating band according to a second embodiment of the present invention;
fig. 8 is a distortion diagram of the operating band field curvature according to the second embodiment of the present invention;
fig. 9 is a schematic view of an optical structure according to a third embodiment of the present invention;
fig. 10 is an axial chromatic aberration diagram of the operating band according to the third embodiment of the present invention;
fig. 11 is a vertical axis chromatic aberration diagram of the operating wavelength band according to the third embodiment of the present invention;
fig. 12 is a field curvature distortion diagram of the working band of the third embodiment of the present invention;
in the figure: l1-a first lens; l2-a second lens; l3-a third lens; l4-fourth lens; l5-a fifth lens; l6-sixth lens; l7-equivalent glass plate; a STOP-diaphragm; IMA-imaging plane.
The specific implementation mode is as follows:
the present invention will be further explained with reference to the drawings and the embodiments.
The telephoto type large aperture optical lens of the present invention includes a first lens L1, a second lens L2, a diaphragm, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, an equivalent glass plate L7, and an IMA image plane, which are sequentially disposed from an object side to an image side along a light incident path; the first lens is a positive meniscus lens, the second lens and the sixth lens are negative meniscus lenses, and object planes and image planes of the first lens, the second lens and the sixth lens are convex towards the object side; the third lens is a double-concave negative lens; the fourth lens and the fifth lens are double convex positive lenses; the third lens and the fourth lens are mutually bonded into a meniscus lens; the focal length of an optical system of the optical lens is f, and the focal lengths of the first lens, the second lens, the third lens, the fourth lens, the fifth lens and the sixth lens are respectively f1、f2、f3、f4、f5、f6Wherein f is1、f2、f5、f6And f satisfy the following ratio: 0.74<f1/f<0.91，-1.5<f2/f<-0.5，0.1<f5/f<1.8，-4.3<f6/f<-2.1。
Preferably, the first lens satisfies the relation: n is a radical ofd≥1.5，VdLess than or equal to 50.0; the second lens satisfies the relation: n is a radical ofd≥1.5，VdLess than or equal to 50.0; the third lens satisfies the relation: n is a radical of hydrogend≥1.5，VdLess than or equal to 50.0; the fourth lens satisfies the relation: n is a radical ofd≥1.5，VdNot less than 50.0; the fifth lens satisfies the relation: n is a radical ofd≥1.5，VdNot less than 50.0; the sixth lens satisfies the relation: n is a radical ofd≥1.5，VdLess than or equal to 50.0; wherein N isdIs refractive index, VdAbbe constant.
Preferably, the second lens and the sixth lens are aspheric lenses, and the aspheric curve equation expression is as follows:
wherein Z is the distance from the vertex of the aspheric surface to the aspheric surface when the aspheric surface is at the position with the height of h along the optical axis direction; c is the paraxial curvature of the aspheric surface; k is a conic constant; alpha (alpha) ("alpha")1、α2、α3、α4、α5、α6、α7、α8Are all high-order term coefficients.
Preferably, the total optical length TTL of the optical system and the focal length f of the optical system satisfy: TTL/f is less than or equal to 1.93.
Preferably, the F number of the optical system is less than or equal to 1.41; the half image height ImaH of the optical system and the focal length f of the optical system meet the following conditions: imaH/f is more than or equal to 0.31.
The specific implementation process comprises the following steps: the first embodiment is as follows:
technical indexes realized by the optical system of the embodiment are as follows:
(1) Focal length: EFFL is less than or equal to 15.00 mm; (2) the aperture F is less than or equal to 1.40; (3) working wave band: visible light.
To realize the above design parameters, the specific design adopted by the optical system of this embodiment is as follows:
the aspherical surface coefficients of the aspherical lenses of the optical system of the present embodiment are as follows:
the second embodiment:
technical indexes realized by the optical system of the embodiment are as follows:
(1) Focal length: EFFL is less than or equal to 15.00 mm; (2) the aperture F is less than or equal to 1.40; (3) working wave band: visible light.
To realize the above design parameters, the specific design adopted by the optical system of this embodiment is as follows:
the aspherical coefficients of the aspherical lenses of the optical system of the present embodiment are as follows:
example three:
technical indexes realized by the optical system of the embodiment are as follows:
(1) Focal length: EFFL is less than or equal to 15.00 mm; (2) the aperture F is less than or equal to 1.41; (3) working wave band: visible light.
To realize the above design parameters, the specific design adopted by the optical system of this embodiment is as follows:
the aspherical coefficients of the aspherical lenses of the optical system of the present embodiment are as follows:
while the invention has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention. However, any simple modification, equivalent change and modification made to the above embodiments according to the technical substance of the present invention still belong to the protection scope of the technical solution of the present invention.
Claims (5)
1. A telephoto type large aperture optical lens, comprising: the optical lens comprises a first lens, a second lens, a diaphragm, a third lens, a fourth lens, a fifth lens, a sixth lens, an equivalent glass flat plate and an IMA imaging surface which are sequentially arranged from the object side to the image side along a light incidence light path; the first lens is a positive meniscus lens, the second lens and the sixth lens are negative meniscus lenses, and object planes and image planes of the first lens, the second lens and the sixth lens are convex towards the object side; the third lens is a double-concave negative lens; the fourth lens and the fifth lens are double convex positive lenses; the third lens and the fourth lens are mutually bonded into a meniscus lens; the focal length of an optical system of the optical lens is f, and the focal lengths of the first lens, the second lens, the third lens, the fourth lens, the fifth lens and the sixth lens are respectively f1、f2、f3、f4、f5、f6Wherein f is1、f2、f5、f6And f satisfy the following ratio: 0.74<f1/f<0.91，-1.5<f2/f<-0.5，0.1<f5/f<1.8，-4.3<f6/f<-2.1。
2. The telephoto-type large aperture optical lens according to claim 1, wherein: the first lens of the optical lens satisfies the relation: n is a radical of hydrogend≥1.5，VdLess than or equal to 50.0; the second lens satisfies the relation: n is a radical ofd≥1.5，VdLess than or equal to 50.0; the third lens satisfies the relation: n is a radical ofd≥1.5，VdLess than or equal to 50.0; the fourth lens satisfies the relation: n is a radical ofd≥1.5，VdNot less than 50.0; the fifth lens satisfies the relation: n is a radical of hydrogend≥1.5，VdNot less than 50.0; the sixth lens satisfies the relation: n is a radical ofd≥1.5，VdLess than or equal to 50.0; wherein N isdIs refractive index, VdAbbe constant.
3. The telephoto-type large aperture optical lens according to claim 1 or 2, wherein: the second lens and the sixth lens are aspheric lenses, and the expression of an aspheric curve equation is as follows:
wherein Z is the distance from the aspheric surface to the aspheric surface vertex when the aspheric surface is at the position with the height of h along the optical axis direction; c is the paraxial curvature of the aspheric surface; k is a conic constant; alpha (alpha) ("alpha")1、α2、α3、α4、α5、α6、α7、α8Are all high order coefficient.
4. The telephoto-type large aperture optical lens according to claim 3, wherein: the total optical length TTL of the optical system and the focal length f of the optical system meet the following conditions: TTL/f is less than or equal to 1.93; the F number of the optical system is less than or equal to 1.41.
5. The telephoto-type large aperture optical lens according to claim 4, wherein: the half image height ImaH of the optical system and the focal length f of the optical system meet the following conditions: imaH/f is more than or equal to 0.31.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202221026175.6U CN217718228U (en) | 2022-04-28 | 2022-04-28 | Telephoto type large aperture optical lens |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202221026175.6U CN217718228U (en) | 2022-04-28 | 2022-04-28 | Telephoto type large aperture optical lens |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114859510A (en) * | 2022-04-28 | 2022-08-05 | 福建福光天瞳光学有限公司 | Telephoto type large-aperture optical lens and working method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114859510A (en) * | 2022-04-28 | 2022-08-05 | 福建福光天瞳光学有限公司 | Telephoto type large-aperture optical lens and working method thereof |
| CN114859510B (en) * | 2022-04-28 | 2024-03-01 | 福建福光天瞳光学有限公司 | Long-distance large-aperture optical lens and working method thereof |
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