CN216310395U - 6mm low-light-level ultra-wide-angle optical lens - Google Patents

Abstract

The utility model discloses a 6mm low-light-level super-wide-angle optical lens, which belongs to the technical field of optical lenses and 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 an optical filter which are sequentially arranged from an object plane to an image plane along an optical axis; the focal lengths of the twelve lenses are negative, positive, negative, positive and positive in sequence, and are all glass spherical lenses. Because the structure layout of the lens is reasonably optimized, the focal power distribution is optimized, and high-refractive-index and ultra-low dispersion materials are used, the number of the lenses used by the lens is reduced from the previous 16 lenses to 12 lenses, so that the space of 4 lenses is reduced, and the space occupied by optical components is greatly reduced; through the correction of optical design, the optical total length of the lens is finally reduced to be within 66mm, and the resolution reaches over 800 ten thousand pixels.

Description

6mm low-light-level ultra-wide-angle optical lens

Technical Field

The utility model relates to the technical field of optical lenses, in particular to a 6mm low-light-level super-wide-angle optical lens.

Background

The network monitoring system is an important component part for information acquisition in a network transportation system in China, and is accompanied with the development of smart cities. In most cities of China, a network monitoring local area network is established, and managers can see some emergencies and daily things through a network system and then timely process the emergencies and daily things. Some city monitoring systems can also perform corresponding data conversion according to changes of weather environments to control the camera lens to automatically point to a road crowded or sudden area, and certain intelligent functions are achieved. With the continuous release of various standards and specifications, the industry of intelligent monitoring systems will develop in a more normative and orderly manner. New technical demands are also increasing in development. The high-definition lens and the infrared confocal lens have the advantages of reducing cost and improving the stability of the lens, and become bright spots which are continuously pursued by people. Therefore, in view of the above, it is necessary to develop a 6mm micro-optical lens with large target surface and high definition.

The patent with the publication number of CN105425365B discloses a 6mm large-light-passing prime lens, wherein a lens group front group A, a lens group rear group B and a diaphragm C arranged between the lens group front group A and the lens group rear group B are sequentially arranged in an optical system of the lens along the light incidence direction, the lens group front group A is sequentially provided with a biconcave lens A-1, a biconvex lens A-2 and a biconcave lens A-3 along the light incidence direction, and the lens group rear group B is sequentially provided with a biconvex lens B-1, a biconvex lens B-2 and a negative crescent lens B-3 glued with the biconvex lens B-2 along the light incidence direction. This camera lens light path overall length is shorter, is favorable to reducing the total volume of camera lens to it is big to lead to the light bore, and the light inlet quantity is sufficient, is convenient for use under the environment is dim, and the negative focal power of group A before the lens group cooperates the positive focal power of group B behind the lens group in addition, guarantees that the camera lens all can normal use in high low temperature environment, but this camera lens pixel quality remains to be improved.

Disclosure of Invention

In view of the above, the present invention provides a 6mm micro-optical super wide-angle optical lens.

In order to solve the technical problems, the technical scheme adopted by the utility model is as follows:

a6 mm low-light-level super-wide-angle optical lens 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 an optical filter which are sequentially arranged from an object plane to an image plane along an optical axis; the focal lengths of the first lens, the second lens, the third lens, the fourth 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 negative, positive, negative, positive and positive in sequence, and are all glass spherical lenses.

Further, the first lens, the fourth lens, the fifth lens and the sixth lens are all high-refractive-index lenses.

Further, the second lens, the fourth lens and the fifth lens are all low dispersion lenses.

Further, the seventh lens, the ninth lens and the tenth lens are all ultra-low dispersion lenses.

Further, the optical lens fno reaches 1.08.

Furthermore, the total optical length of the optical lens is less than or equal to 66 mm.

The utility model has the beneficial effects that:

the traditional lens has large volume, the resolution yield of the assembled product is low, and the mass production is difficult; the cost generated by lens production is high, and the effect is not ideal in high-end fields; and the AA-system assembly mode cannot be realized on an IP network machine, and the structural members are classified more.

The utility model discloses a micro-optical-level ultra-wide-angle optical lens with a focal length of 6mm, which has the following advantages:

1. the FNo. of the lens reaches 1.08 by matching 12 glass lenses;

2. the high-low temperature (high temperature +80 ℃, low temperature-40 ℃) virtual focus-free is realized through the precise matching of the structure and the optics;

3. the image resolving power of 80% reaches more than 800 ten thousand pixels through optical simulation and multiple adjustment of structural tolerance;

4. the focusing mode is to focus through a CMOS end;

5. large wide angle and long depth.

The requirement of a low-light high-definition lens is generally met, the lens has no virtual focus in the high-low temperature (high temperature +80 ℃ and low temperature-40 ℃) state, and the total number of glass lenses reaches more than 16; the lens of the utility model has reasonable and optimized structural layout, optimized focal power distribution, high refractive index and ultra-low dispersion material, and reduced number of lenses to 12, thereby reducing cost.

Because the number of the lens is reduced from the previous 16 to 12, the space of 4 lenses is reduced, and the space occupied by the optical component is greatly reduced; and finally, the optical total length of the lens is reduced to be within 66mm through the correction of the optical design.

Drawings

The present invention will be described in further detail with reference to the accompanying drawings.

Fig. 1 is a schematic structural diagram of an optical lens according to the present invention.

Fig. 2 is a spherical aberration diagram of the optical lens of the present invention.

Fig. 3 is a graph showing the field region and distortion of the optical lens of the present invention.

Fig. 4 is a chromatic aberration diagram of the optical lens of the present invention.

Fig. 5 is a MTF graph of an optical lens of the present invention.

The meaning of the respective reference numerals is as follows:

1: first lens, 2: second lens, 3: third lens, 4: fourth lens, 5: fifth lens, 6: sixth lens, 7: seventh lens, 8: eighth lens, 9: ninth lens, 10: tenth lens, 11: eleventh lens, 12: twelfth lens, 13: and (3) a filter.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to fig. 1 to 5 of the embodiments of the present invention. It is to be understood that the embodiments described are only a few embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the described embodiments of the utility model, are within the scope of the utility model.

Example 1

Referring to fig. 1 to 5, the embodiment provides a 6mm micro-optic super-wide-angle optical lens, which includes a first lens 1, a second lens 2, a third lens 3, a fourth lens 4, a fifth lens 5, a sixth lens 6, a seventh lens 7, an eighth lens 8, a ninth lens 9, a tenth lens 10, an eleventh lens 11, a twelfth lens 12, and a filter 13 sequentially disposed along an optical axis from an object plane to an image plane; the focal lengths of the first lens 1, the second lens 2, the third lens 3, the fourth lens 4, the fifth lens 5, the sixth lens 6, the seventh lens 7, the eighth lens 8, the ninth lens 9, the tenth lens 10, the eleventh lens 11 and the twelfth lens 12 are negative, positive, negative, positive and positive in sequence, and are all glass spherical lenses.

The first lens 1, the fourth lens 4, the fifth lens 5 and the sixth lens 6 are all high refractive index lenses.

The second lens 2, the fourth lens 4 and the fifth lens 5 are all low dispersion lenses.

The seventh lens 7, the ninth lens 9, and the tenth lens 10 are all ultra-low dispersion lenses.

The optical lens fno reaches 1.08.

The total optical length of the optical lens is less than or equal to 66 mm.

The fifth lens 5 and the sixth lens 6 are spherical lenses made of high-refractive-index materials, so that the work is guaranteed, the number of the lenses is reduced, and the total length of the lens is reduced. The light transmission aperture of the lens is increased, and the increase of spherical aberration and coma is mainly brought. The fourth lens 4 and the fifth lens 5 are made of high-refractive-index low-dispersion materials, so that the spherical aberration and the coma aberration can be effectively corrected, and the residual spherical aberration and the coma aberration of the lens are small. The seventh lens 7, the ninth lens 9 and the tenth lens 10 are made of ultra-low dispersion materials, so that chromatic spherical aberration and secondary spectral chromatic aberration can be effectively corrected, and the function of the super-starlight is guaranteed.

The material of the positive and negative focal power lenses is selected and used, and the mechanical structure is combined, so that the variation of the positive and negative focal power lenses is consistent, and the high and low temperature can be realized without coke leakage.

The second lens 2 is made of a low-dispersion material lens, the first lens 1, the fifth lens 5 and the sixth lens 6 are made of a high-refractive-index material lens, and a reasonable optical structure is selected, so that aberrations such as astigmatism, field curvature, vertical-axis chromatic aberration and the like caused by an ultra-wide angle can be effectively corrected, and the resolution quality of the lens is improved.

Table 1 shows one design example of the present application.

TABLE 1 System data

Noodle numbering	Type of noodle	Radius of	Thickness of	Material
					OBJ	STANDARD	infinity	infinity
1	Spherical surface	23.86	1.10	H-ZLAF70
					2	Spherical surface	9.55	7.18
3	Spherical surface	-24.61	0.80	H-ZK3A
					4	Spherical surface	17.89	4.83
5	Spherical surface	-11.34	0.80	H-ZLAF76
					6	Spherical surface	-54.11	4.22	H-FK
7	Spherical surface	-13.27	0.10
					8	Spherical surface	-41.46	2.64	H-ZLAF82
9	Spherical surface	-23.73	0.10
					10	Spherical surface	24.05	3.84	H-ZLAF70
11	Spherical surface	-645.00	10.38
					STO	Spherical surface	infinity	2.33
13	Spherical surface	17.17	4.32	H-ZPK5
					14	Spherical surface	-14.94	0.80	H-ZF13
15	Spherical surface	14.94	0.87
					16	Spherical surface	35.62	4.13	H-ZPK5
17	Spherical surface	-9.95	0.80	H-ZLAF70
					18	Spherical surface	-32.04	0.15
19	Spherical surface	24.74	4.75	H-ZPK2
					20	Spherical surface	-24.74	0.15
21	Spherical surface	16.58	2.79	H-ZLAF90
					22	Spherical surface	30.05

In table 1 above:

surface numbers 1 and 2 respectively indicate a first surface and a second surface of the first lens 1;

surface numbers 3 and 4 respectively indicate a first surface and a second surface of the second lens 2;

surface number 5 indicates the first surface of the third lens 3;

surface numbers 6 and 7 respectively indicate the first surface and the second surface of the fourth lens 4;

surface numbers 8 and 9 respectively denote a first surface and a second surface of the fifth lens 5;

surface numbers 10 and 11 respectively indicate the first surface and the second surface of the sixth lens 6;

the surface number 13 indicates the first surface of the seventh lens 7;

surface numbers 14 and 15 respectively denote a first surface and a second surface of the eighth lens 8;

the surface number 16 indicates the first surface of the ninth lens 9;

surface numbers 17 and 18 respectively denote a first surface and a second surface of the tenth lens 10;

surface numbers 19 and 20 respectively denote a first surface and a second surface of the eleventh lens 11;

surface numbers 21 and 22 respectively indicate the first surface and the second surface of the twelfth lens 12;

wherein, the first surface is the surface facing the object surface side, and the second surface is the surface facing the image surface.

Referring to the attached drawings 2-5 of the specification, the spherical aberration is corrected to be within +/-0.03 mm, and the spherical aberration is corrected well in the spectral bandwidth, so that the smoothness of a real shot picture of the lens can be improved. Because of using the aspheric lens, astigmatism and field curvature can be corrected to a proper range, so that the resolution in the meridian direction can be close to that in the sagittal direction. Vertical axis chromatic aberration, for an ultra-wide-angle lens, the requirement of the resolution quality of the lens can be met when the relative vertical axis chromatic aberration of f light, d light and c light is within 5 mu m; the MTF graph shows that the lens has excellent resolving power, the central visual field and the 0.7 visual field are within, and the spatial frequency of 160cycles/mm has higher sharpness.

In the description of the present invention, it is to be understood that relational terms such as "a," "an," "two," and the like may be used solely to separate one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions.

Although specific embodiments of the utility model have been described above, it will be understood by those skilled in the art that the specific embodiments described are illustrative only and are not limiting upon the scope of the utility model, and that equivalent modifications and variations can be made by those skilled in the art without departing from the spirit of the utility model, which is to be limited only by the appended claims.

Claims (6)

1. A6 mm low-light-level super wide-angle optical lens is characterized in that: the optical lens comprises a first lens (1), a second lens (2), a third lens (3), a fourth lens (4), a fifth lens (5), a sixth lens (6), a seventh lens (7), an eighth lens (8), a ninth lens (9), a tenth lens (10), an eleventh lens (11), a twelfth lens (12) and an optical filter (13) which are sequentially arranged from an object plane to an image plane along an optical axis; the focal lengths of the first lens (1), the second lens (2), the third lens (3), the fourth lens (4), the fifth lens (5), the sixth lens (6), the seventh lens (7), the eighth lens (8), the ninth lens (9), the tenth lens (10), the eleventh lens (11) and the twelfth lens (12) are negative, positive, negative, positive and positive in sequence, and are all glass spherical lenses.

2. A 6mm micro-optic super-wide-angle optical lens of claim 1, wherein: the first lens (1), the fourth lens (4), the fifth lens (5) and the sixth lens (6) are all high-refractive-index lenses.

3. A 6mm micro-optic super-wide-angle optical lens of claim 2, wherein: the second lens (2), the fourth lens (4) and the fifth lens (5) are all low-dispersion lenses.

4. A 6mm micro-optic super-wide-angle optical lens of claim 3, wherein: the seventh lens (7), the ninth lens (9) and the tenth lens (10) are all ultra-low dispersion lenses.

5. The 6mm micro-optic super-wide-angle optical lens of claim 4, wherein: the optical lens fno reaches 1.08.

6. The 6mm micro-optic super-wide-angle optical lens of claim 5, wherein: the total optical length of the optical lens is less than or equal to 66 mm.

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