CN217443628U - Optical system of camera with large visual field and high imaging stability - Google Patents
Optical system of camera with large visual field and high imaging stability Download PDFInfo
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- CN217443628U CN217443628U CN202220590241.6U CN202220590241U CN217443628U CN 217443628 U CN217443628 U CN 217443628U CN 202220590241 U CN202220590241 U CN 202220590241U CN 217443628 U CN217443628 U CN 217443628U
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Abstract
The utility model relates to an optical system of high imaging stability camera of big visual field, include along first lens, second lens, third lens, diaphragm, fourth lens, fifth lens and the sixth lens that light incident light path set gradually from the left hand right side. The utility model has wide monitoring range, the horizontal FOV is more than or equal to 130 degrees, and the horizontal FOV is obviously superior to the similar products in the current market; the image plane drift amount is small within the temperature range of minus 40 ℃ to 105 ℃, the glass material collocation is reasonable, the imaging stability is high, and the chromatic aberration is small; f number is small, system light flux is high, and night vision imaging quality is further ensured; high imaging quality, adopts a glass-plastic mixed structure, fully utilizes the aberration correction capability of the aspheric surface, and ensures that the camera has the advantages of light weight and high image quality.
Description
The technical field is as follows:
the utility model relates to an optical system of high imaging stability camera of big visual field.
Background art:
nowadays, the fusion of the AI algorithm and the optical imaging lens creates a brand-new development direction for the development of the security lens and further develops more various use scenes; high-resolution shooting, night vision, ultra-wide angle and small and light weight are common targets of current security lens manufacturers, and how to improve the monitoring visual field, expand the working temperature and other environmental conditions and ensure the imaging quality is a main technical problem faced by the current camera design.
The invention content is as follows:
in view of the deficiencies of the prior art, the technical problem to be solved by the present invention is to provide an optical system of a camera with large field of view and high imaging stability.
In order to solve the technical problem, the technical scheme of the utility model is that: an optical system of a camera with a large field of view and high imaging stability comprises a first lens, a second lens, a third lens, a diaphragm, a fourth lens, a fifth lens and a sixth lens which are sequentially arranged from an object side to an image side along a light incident path; the third lens, the fourth lens and the sixth lens are all double-convex positive lenses; the first lens, the second lens and the fifth lens are negative meniscus lenses with the object plane and the image plane facing the object side, and the monitoring range of the optical system is as follows: the horizontal FOV is more than or equal to 130 degrees,
the technical indexes of the optical system are as follows: (1) focal length: EFFL is more than or equal to 2.1mm and less than or equal to 3.3 mm; (2) the aperture F is less than or equal to 1.63.
Preferably, the focal length of the optical system 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 f 1 、f 2 、f 3 、f 4 、f 5 、f 6 Wherein f is 1 、f 2 、f 3 、f 4 、f 5 、f 6 And f satisfy the following ratio: -3.0<f 1 /f<-0.7，-3.0<f 2 /f<-1.0，5.0<f 3 /f<6.5，2.0<f 4 /f<3.5，-3.9<f 5 /f<-2.0，1.3<f 6 /f<3.0。
Preferably, the first lens satisfies the relation: n is a radical of d ≥1.5，V d Not less than 50.0; the second lens satisfies the relation: n is a radical of hydrogen d ≥1.5，V d Not less than 50.0; the third lens satisfies the relation: n is a radical of d ≥1.5，V d Less than or equal to 55.0; the fourth lens satisfies the relation: n is a radical of d ≥1.5，V d Not less than 50.0; the fifth lens satisfies the relation: n is a radical of d ≥1.5，V d Less than or equal to 50.0; the sixth lens satisfies the relation: n is a radical of d ≥1.5，V d Not less than 50.0; wherein N is d Is refractive index, V d Abbe constant.
Preferably, the second lens, the third lens, the fifth lens and the sixth lens are aspheric lenses, and the aspheric curve equation expression 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 、α 2 、α 3 、α 4 、α 5 、α 6 、α 7 、α 8 All are 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 9.55.
Preferably, the half-image height ImaH of the optical system and the focal length f of the optical system satisfy: ImaH/f is more than or equal to 1.5.
Preferably, the specific parameters used are as follows:
preferably, the aspherical coefficients of the aspherical lenses are as follows:
the utility model discloses optical system's of high imaging stability camera of big visual field working method, its characterized in that: the optical system of the camera with the large visual field and the high imaging stability comprises a first lens, a second lens, a third lens, a diaphragm, a fourth lens, a fifth lens, a sixth lens, an equivalent glass plate and an IMA imaging surface which are sequentially arranged from the object side to the image side along a light incident path; the third lens, the fourth lens and the sixth lens are all double-convex positive lenses; the first lens, the second lens and the fifth lens are negative meniscus lenses with the object plane and the image plane facing the object side, and the monitoring range of the optical system is as follows: the horizontal FOV is more than or equal to 130 degrees,
the technical indexes of the optical system are as follows: (1) focal length: EFFL is more than or equal to 2.1mm and less than or equal to 3.3 mm; (2) the aperture F is less than or equal to 1.63;
when light enters, the light sequentially enters the first lens, the second lens, the third lens, the diaphragm, the fourth lens, the fifth lens, the sixth lens and the equivalent glass flat plate along the light path and then is imaged on the IMA imaging surface.
Compared with the prior art, the utility model discloses following beneficial effect has:
(1) the monitoring range is wide, the horizontal FOV is more than or equal to 130 degrees, the full-view FOV can reach 170 degrees, the monitoring range is obviously superior to similar products in the current market, and the monitoring range can be adapted to 1/2.7' target surface large-size CMOS;
(2) the image plane drift amount is small in the temperature range of minus 40 ℃ to 105 ℃, the glass material collocation is reasonable, the imaging stability is high, and the chromatic aberration is small;
(3) f number is small, system light flux is high, and night vision imaging quality is further ensured;
(4) high imaging quality, adopts a glass-plastic mixed structure, fully utilizes the aberration correction capability of the aspheric surface, and ensures that the camera has the advantages of light weight and high image quality.
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;
in the figure: l1-first lens; l2-second lens; l3-third lens; STOP-diaphragms; l4-fourth lens; l5-fifth lens; l6-sixth lens; CG-equivalent glass plate; 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 utility model discloses optical system of high imaging stability camera of big visual field, include along the light incident light path from the object side to the image side first lens L1, second lens L2, third lens L3, diaphragm STOP, fourth lens L4, fifth lens L5 and sixth lens L6 that set gradually; the third lens L3, the fourth lens L4, and the sixth lens L6 are all biconvex positive lenses; the first lens L1, the second lens L2, and the fifth lens L5 are negative meniscus lenses with both the object plane and the image plane facing the object side, and the monitoring range of the optical system is as follows: the horizontal FOV is more than or equal to 130 degrees,
the technical indexes of the optical system are as follows: (1) focal length: EFFL is more than or equal to 2.1mm and less than or equal to 3.3 mm; (2) the aperture F is less than or equal to 1.63.
Preferably, the optical system has a focal length f, and the first lens, the second lens, the third lens, the fourth lens, the fifth lens and the sixth lens are arranged in parallelFocal lengths of the mirrors are respectively f 1 、f 2 、f 3 、f 4 、f 5 、f 6 Wherein f is 1 、f 2 、f 3 、f 4 、f 5 、f 6 And f satisfy the following ratio: -3.0<f 1 /f<-0.7，-3.0<f 2 /f<-1.0，5.0<f 3 /f<6.5，2.0<f 4 /f<3.5，-3.9<f 5 /f<-2.0，1.3<f 6 /f<3.0。
Preferably, the first lens satisfies the relation: n is a radical of d ≥1.5，V d Not less than 50.0; the second lens satisfies the relation: n is a radical of d ≥1.5，V d Not less than 50.0; the third lens satisfies the relation: n is a radical of d ≥1.5，V d Less than or equal to 55.0; the fourth lens satisfies the relation: n is a radical of hydrogen d ≥1.5，V d Not less than 50.0; the fifth lens satisfies the relation: n is a radical of d ≥1.5，V d Less than or equal to 50.0; the sixth lens satisfies the relation: n is a radical of hydrogen d ≥1.5，V d Not less than 50.0; wherein N is d Is refractive index, V d Abbe constant.
Preferably, the second lens, the third lens, the fifth lens and the sixth lens are aspheric lenses, and the aspheric curve equation expression 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 is alpha 1 、α 2 、α 3 、α 4 、α 5 、α 6 、α 7 、α 8 All are 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 9.55.
Preferably, the half-image height ImaH of the optical system and the focal length f of the optical system satisfy: ImaH/f is more than or equal to 1.5.
Preferably, the specific parameters used are as follows:
preferably, the aspherical coefficients of the aspherical lenses are as follows:
the utility model discloses optical system's of high imaging stability camera working method of big visual field, its characterized in that: the optical system of the camera with the large visual field and the high imaging stability comprises a first lens, a second lens, a third lens, a diaphragm, a fourth lens, a fifth lens, a sixth lens, an equivalent glass plate and an IMA imaging surface which are sequentially arranged from the object side to the image side along a light incident path; the third lens, the fourth lens and the sixth lens are all double-convex positive lenses; the first lens, the second lens and the fifth lens are negative meniscus lenses with the object plane and the image plane all facing the object side, and the monitoring range of the optical system is as follows: the horizontal FOV is more than or equal to 130 degrees,
the technical indexes of the optical system are as follows: (1) focal length: EFFL is more than or equal to 2.1mm and less than or equal to 3.3 mm; (2) the aperture F is less than or equal to 1.63;
when light enters, the light sequentially enters the first lens, the second lens, the third lens, the diaphragm, the fourth lens, the fifth lens, the sixth lens and the equivalent glass flat plate along the light path and then is imaged on an IMA imaging surface.
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 (7)
1. An optical system of a camera with large visual field and high imaging stability is characterized in that: the optical lens comprises a first lens, a second lens, a third lens, a diaphragm, a fourth lens, a fifth lens, a sixth lens, an equivalent glass plate and an IMA imaging surface which are sequentially arranged from the object side to the image side along a light incident path; the third lens, the fourth lens and the sixth lens are all double-convex positive lenses; the first lens, the second lens and the fifth lens are negative meniscus lenses with the object surface and the image surface facing the object side.
2. The optical system of a large-field-of-view high-imaging-stability camera according to claim 1, characterized in that: the monitoring range of the optical system is as follows: the horizontal FOV is more than or equal to 130 degrees,
the technical indexes of the optical system are as follows: (1) focal length: EFFL is more than or equal to 2.1mm and less than or equal to 3.3 mm; (2) the aperture F is less than or equal to 1.63.
3. The optical system of the large-field-of-view high-imaging-stability camera according to claim 1 or 2, characterized in that: the focal length of the optical system 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 f 1 、f 2 、f 3 、f 4 、f 5 、f 6 Wherein f is 1 、f 2 、f 3 、f 4 、f 5 、f 6 And f satisfy the following ratio: -3.0<f 1 /f<-0.7，-3.0<f 2 /f<-1.0，5.0<f 3 /f<6.5，2.0<f 4 /f<3.5，-3.9<f 5 /f<-2.0，1.3<f 6 /f<3.0。
4. The optical system of a large-field-of-view high-imaging-stability camera according to claim 3, wherein: the first lens satisfies the relation: n is a radical of d ≥1.5，V d Not less than 50.0; the second lens satisfies the relation：N d ≥1.5，V d Not less than 50.0; the third lens satisfies the relation: n is a radical of hydrogen d ≥1.5，V d Less than or equal to 55.0; the fourth lens satisfies the relation: n is a radical of d ≥1.5，V d Not less than 50.0; the fifth lens satisfies the relation: n is a radical of d ≥1.5，V d Less than or equal to 50.0; the sixth lens satisfies the relation: n is a radical of d ≥1.5，V d Not less than 50.0; wherein N is d Is a refractive index, V d Abbe constant.
5. The optical system of a large-field-of-view high-imaging-stability camera according to claim 4, wherein: the second lens, the third lens, the fifth 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 alpha 1 、α 2 、α 3 、α 4 、α 5 、α 6 、α 7 、α 8 Are all high-order term coefficients.
6. The optical system of a large-field-of-view high-imaging-stability camera according to claim 4, 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 9.55.
7. The optical system of a large-field-of-view high-imaging-stability camera 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 1.5.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114609755A (en) * | 2022-03-17 | 2022-06-10 | 福建福光天瞳光学有限公司 | Optical system of camera with large view field and high imaging stability and working method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114609755A (en) * | 2022-03-17 | 2022-06-10 | 福建福光天瞳光学有限公司 | Optical system of camera with large view field and high imaging stability and working method thereof |
| CN114609755B (en) * | 2022-03-17 | 2024-04-12 | 福建福光天瞳光学有限公司 | Optical system of large-view-field high-imaging-stability camera and working method thereof |
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