CN216083232U

CN216083232U - Long-focus black light level high-definition optical imaging lens

Info

Publication number: CN216083232U
Application number: CN202121527016.XU
Authority: CN
Inventors: 柳振全; 丁翊轩; 李梦幻; 丁松涛
Original assignee: Henan Yixuan Photoelectric Technology Co
Current assignee: Henan Yixuan Photoelectric Technology Co
Priority date: 2021-07-06
Filing date: 2021-07-06
Publication date: 2022-03-18
Anticipated expiration: 2031-07-06

Abstract

The utility model provides a telephoto black light level high-definition optical imaging 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 and a photosensitive chip which are sequentially arranged from an object plane to a mirror plane along an optical axis, wherein the lenses are all glass spherical lenses, and focal lengths of the first lens to the tenth lens are sequentially positive, negative, positive, negative and negative from left to right; according to the utility model, the ten glass lenses are matched, so that the lens can meet the requirement of fourteen lenses on no virtual focus, the cost requirement required by the lens is reduced, and the high-temperature and low-temperature virtual focus-free lens is realized through the precise matching of the structures and optics among the lenses, so that the FNo of the lens reaches 1.2, and the image resolving power of 100% reaches 1200 ten thousand pixels through optical simulation and the structures among the lenses.

Description

Long-focus black light level high-definition optical imaging lens

Technical Field

The utility model relates to the technical field of optical lenses, in particular to a telephoto black light level high-definition optical imaging lens.

Background

In recent years, with the continuous development of network technologies, the advancement of safe cities and intelligent traffic projects has made higher demands on the resolution, high-power zooming, low-light and highlight-distinguishable objects, large-field-of-view, fog-penetrating and anti-shake technologies of optical lenses, and the demand is on the trend of high-end and intelligent development. The widening of the market of the optical lens not only brings huge power to the industry, but also promotes the continuous promotion of the demand of the optical lens. New technical needs are also emerging for continued innovation. The lens has the characteristics of high resolution, infrared confocal property, large wide angle, large aperture, corrosion resistance, capability of bearing severe environment and the like, and becomes the primary condition for being used as a security monitoring lens.

At present, the traditional lens has a small aperture, poor product resolution and low yield after assembly. The cost of lens production is high, and the effect in high-end field is not ideal, therefore, a long-focus black light level high-definition optical imaging lens is provided to solve the above-mentioned problems.

SUMMERY OF THE UTILITY MODEL

In view of the above, the present invention provides a telephoto black-light high definition optical imaging lens, which not only can reduce the number of lenses used in the lens and reduce the cost of the lens, but also can achieve the high and low temperature non-virtual focus phenomenon, so that the resolution of the lens reaches 100% to 1200 ten thousand pixels.

In order to solve the technical problem, the utility model provides a telephoto black light level high definition optical imaging lens, which 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 and a photosensitive chip which are sequentially arranged from an object plane to a mirror plane along an optical axis, wherein the lenses are all glass spherical lenses, and focal lengths of the first lens to the tenth lens are sequentially positive, negative, positive, negative and negative from left to right.

Further, a diaphragm used for limiting the light beam is arranged between the fifth lens and the sixth lens.

Further, the second lens, the fifth lens and the sixth lens adopt ultra-low dispersion lenses.

Further, the first lens, the third lens and the eighth lens adopt high-refractive-index lenses.

Further, a cemented lens for eliminating chromatic aberration is formed by combining the second lens and the third lens, the fourth lens and the fifth lens, and the ninth lens and the tenth lens.

Further, the first lens element, the second lens element, the seventh lens element and the eighth lens element are all negative meniscus lens elements, the fifth lens element, the sixth lens element and the ninth lens element are all double convex lens elements, and the fourth lens element and the tenth lens element are all double concave lens elements.

The technical scheme of the utility model has the following beneficial effects:

the lens can meet the requirement of fourteen glass lenses on no virtual focus by matching of ten glass lenses, so that the cost requirement required by the lens is reduced, and high-low temperature (high temperature +85 ℃, low temperature-40 ℃) is free of virtual focus by precise matching of structures and optics among the lenses, so that the FNo of the lens reaches 1.2, wherein 100% of image understanding power reaches 1200 ten thousand pixels by optical simulation and multiple adjustment of structural tolerance among the lenses.

Drawings

FIG. 1 is a schematic diagram of a black-light high-definition optical imaging lens structure according to the present invention;

FIG. 2 is a spherical aberration curve diagram of the black-light level high-definition optical imaging lens according to the present invention;

FIG. 3 is a graph of curvature field and distortion of a black light level high definition optical imaging lens according to the present invention;

FIG. 4 is a graph of vertical chromatic aberration of a black-light high-definition optical imaging lens according to the present invention;

fig. 5 is a graph of MTF of the black-light high-definition optical imaging lens of the present invention.

In the figure: 1. a first lens; 2. a second lens; 3. a third lens; 4. a fourth lens; 5. a fifth lens; 6. a sixth lens; 7. a seventh lens; 8. an eighth lens; 9. a ninth lens; 10. a tenth lens; 11. a photosensitive chip; 12. and (4) a diaphragm.

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 one

As shown in fig. 1: the telephoto black light level high-definition optical imaging 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 and a photosensitive chip 11 which are sequentially arranged from an object plane to a mirror plane along an optical axis, wherein the lenses are all glass spherical lenses, focal lengths of the first lens 1 to the tenth lens 10 are sequentially positive, negative, positive, negative, the first lens 1, the second lens 2, the seventh lens 7 and the eighth lens 8 are all negative meniscus lenses, the fifth lens 5, the sixth lens 6 and the ninth lens 9 are all double-convex lenses, and the fourth lens 4 and the tenth lens 10 are all double-concave lenses.

In the embodiment, the lens can meet the requirement of fourteen glass lenses on no virtual focus by matching of ten glass lenses, so that the cost requirement required by the lens is reduced, and high-low temperature (high temperature +85 ℃, low temperature-40 ℃) is free of virtual focus by precise matching of structures and optics among the lenses, so that the FNo of the lens reaches 1.2, wherein the image resolving power reaches 1200 ten thousand pixels by 100% through optical simulation and multiple times of adjustment of structural tolerance among the lenses.

Example two

As shown in fig. 1, it differs from the first embodiment in that: a diaphragm 12 for limiting the light beam is arranged between the fifth lens 5 and the sixth lens 6.

In this embodiment, in order to limit the light beam, a stop 12 is provided between the fifth lens 5 and the sixth lens 6.

EXAMPLE III

As shown in fig. 1, it differs from the first embodiment in that: the second lens 2, the fifth lens 5 and the sixth lens 6 are made of ultra-low dispersion lenses, and the first lens 1, the third lens 3 and the eighth lens 8 are made of high refractive index lenses.

In this embodiment, the ultra-low dispersion lens and the high refractive index lens are used between the lenses, so that aberrations such as spherical aberration, coma, astigmatism, field curvature and the like can be effectively corrected, and the resolution quality of the lens is improved. Thereby achieving the ideal resolving power.

Example four

As shown in fig. 1, it differs from the first embodiment in that: a cemented lens for eliminating chromatic aberration is formed by the combination of the second lens 2 and the third lens 3, the fourth lens 4 and the fifth lens 5, and the ninth lens 9 and the tenth lens 10.

In this embodiment, in order to avoid chromatic aberration between individual lenses, cemented lenses are provided between the second lens 2 and the third lens 3, between the fourth lens 4 and the fifth lens 5, and between the ninth lens 9 and the tenth lens 10.

Enumerating a practical design embodiment with resolution up to 1200 ten thousand pixels and total lens length within 96mm, which works normally:

TABLE 1 lens data

Noodle numbering	Type of noodle	Radius of	Thickness of	Material	conic
						OBJ	STANDARD	infinity	infinity
1	STANDARD	34.41	7.50	TAFD40
						2	STANDARD	104.25	1.13
3	STANDARD	22.12	10.01	FCD1
						4	STANDARD	152.41	1.40	TAFD55
5	STANDARD	16.04	4.77
						6	STANDARD	-62.04	1.25	H-ZF4LA
7	STANDARD	16.70	6.07	PCD51
						8	STANDARD	-64.21	0.01
STO	STANDARD	infinity	5.37
						10	STANDARD	53.73	7.13	FCD515
11	STANDARD	-53.73	1.34
						12	STANDARD	-34.43	13.00	H-QK3L
13	STANDARD	-24.94	0.09
						14	STANDARD	31.44	4.35	E-FDS1
15	STANDARD	139.83	0.11
						16	STANDARD	22.04	5.99	PCD51
17	STANDARD	-80.88	1.00	H-ZF7A
						18	STANDARD	15.81

In table 1 above:

numerals

1 and 2 denote a first surface and a second surface of the first lens 1, respectively;

numbers

3, 4, and 5 denote first, second, and third surfaces of the second and

third lenses

2 and 3, respectively;

reference numerals

6, 7, and 8 denote first, second, and third surfaces of the fourth lens 4 and the fifth lens 5, respectively;

numerals

10 and 11 denote a first surface and a second surface of the sixth lens 6, respectively;

reference numerals 12 and 13 denote a first surface and a second surface of the seventh lens 7, respectively;

reference numerals 14 and 15 denote a first surface and a second surface of the eighth lens 8, respectively;

reference numerals 16, 17, and 18 denote first, second, and third surfaces of the ninth lens 9 and the tenth lens 10, respectively;

the first surface refers to a surface facing the object surface, the second surface refers to a side facing the image surface, and the third surface refers to a surface shared by the two lenses.

By adopting the scheme, a spherical aberration curve graph, a field curvature and distortion curve graph, a chromatic aberration curve graph and an MTF curve graph of the optical lens are respectively shown in FIGS. 2 to 5, and as can be seen from FIG. 2, the spherical aberration and the chromatic aberration of the formed lens can be corrected to be within +/-0.03 mm, the spherical aberration is corrected well in the spectral bandwidth, and therefore the smoothness of a real shot picture of the lens can be improved. As can be seen from fig. 3, astigmatism and curvature of field can be corrected to a suitable range, so that the resolution in the meridional direction can be matched with the resolution in the sagittal direction. As can be seen from FIG. 4, the vertical axis chromatic aberration, i.e., the relative vertical axis chromatic aberration of the f light, the d light and the c light, is within 1.2 μm, which completely meets the requirements of the resolution quality of the lens. As can be seen from FIG. 5, the lens has excellent resolution, matches with a 1.1 ″ photosensitive chip, has a central field of view and a field of view within 0.7, has a higher sharpness at a spatial frequency of 160cycles/mm, and has an MTF value of 1.0 field of view close to 0.4.

In the present invention, unless otherwise explicitly specified or limited, for example, it may be fixedly attached, detachably attached, or integrated; can be mechanically or electrically connected; the terms may be directly connected or indirectly connected through an intermediate, and may be communication between two elements or interaction relationship between two elements, unless otherwise specifically limited, and the specific meaning of the terms in the present invention will be understood by those skilled in the art according to specific situations.

While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the utility model as defined in the appended claims.

Claims

1. The utility model provides a high definition optical imaging lens of burnt black light level which 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) and a photosensitive chip (11) which are sequentially arranged from an object plane to a mirror plane along an optical axis, wherein the lenses are glass spherical lenses, and focal lengths of the first lens (1) to the tenth lens (10) are sequentially positive, negative, positive, negative and negative from left to right.

2. The tele black-level high-definition optical imaging lens of claim 1, wherein: and a diaphragm (12) for limiting the light beam is arranged between the fifth lens (5) and the sixth lens (6).

3. The tele black-level high-definition optical imaging lens of claim 1, wherein: the second lens (2), the fifth lens (5) and the sixth lens (6) adopt ultra-low dispersion lenses.

4. The tele black-level high-definition optical imaging lens of claim 1, wherein: the first lens (1), the third lens (3) and the eighth lens (8) adopt high-refractive-index lenses.

5. The tele black-level high-definition optical imaging lens of claim 1, wherein: and a cemented lens for eliminating chromatic aberration is formed by combining the second lens (2) and the third lens (3), the fourth lens (4) and the fifth lens (5) and the ninth lens (9) and the tenth lens (10).

6. The tele black-level high-definition optical imaging lens of claim 1, wherein: the first lens (1), the second lens (2), the seventh lens (7) and the eighth lens (8) are all negative meniscus lenses, the fifth lens (5), the sixth lens (6) and the ninth lens (9) are all double convex lenses, and the fourth lens (4) and the tenth lens (10) are all double concave lenses.