CN214795392U

CN214795392U - Short big light ring flake waterproof camera lens of TTL

Info

Publication number: CN214795392U
Application number: CN202121391478.3U
Authority: CN
Inventors: 廖静宜
Original assignee: China Sciences Nanguang Technology Co ltd
Current assignee: China Sciences Nanguang Technology Co ltd
Priority date: 2021-06-22
Filing date: 2021-06-22
Publication date: 2021-11-19
Anticipated expiration: 2031-06-22

Abstract

The utility model discloses a short big light ring fisheye waterproof lens of TTL, fisheye waterproof lens include from the object space to the image space in proper order: the optical lens comprises a first lens, a sealing ring, a second lens, a third lens, a diaphragm spacing ring, a fourth lens, a fifth lens, a spacing ring and a sixth lens, wherein the first lens is a glass lens with a front convex shape and a back concave shape, the second lens is a double concave glass lens, the third lens is a double convex glass lens, the fourth lens is a double concave glass lens, the fifth lens is a double convex glass lens, and the sixth lens is a double convex glass lens; wherein the fourth lens and the fifth lens are combined into a cemented glass lens. The aperture value (F/NO) of the lens is F1.4, the field of view (FOV) is more than or equal to 212 degrees, and compared with other similar fisheye lenses, the utility model has the advantages of large light flux and good low illumination; the total optical length is 13.57mm, which is shorter than that of other fisheye lenses; the lens has the advantages of high pixel and good low-light night vision effect.

Description

Short big light ring flake waterproof camera lens of TTL

The technical field is as follows:

the utility model relates to an optical lens technical field especially relates to a short big light ring flake waterproof camera lens of TTL.

Background art:

with the increasing demand of the market for fisheye lenses, various fisheye lenses are available on the market; the fisheye lens in the market has the defects that the light through hole is not large enough, and the effect of using the lens in a night vision or dark environment is poor.

The utility model has the following contents:

an object of the utility model is to provide a short big light ring flake waterproof camera lens of TTL to solve prior art not enough.

The utility model discloses by following technical scheme implement: the utility model provides a short big light ring fisheye waterproof lens of TTL, the fisheye waterproof lens includes from the object space to the image space in proper order: the optical lens comprises a first lens, a sealing ring, a second lens, a third lens, a diaphragm spacing ring, a fourth lens, a fifth lens, a spacing ring and a sixth lens, wherein the first lens is a glass lens with a front convex and back concave shape, the second lens is a double concave glass lens, the third lens is a double convex glass lens, the fourth lens is a double concave glass lens, the fifth lens is a double convex glass lens, and the sixth lens is a double convex glass lens; wherein the fourth lens and the fifth lens are combined into a cemented glass lens.

Preferably, the diameter of the first lens is 12MM, and the center thickness is 0.85 MM; the diameter of the second lens is 7MM, and the center thickness of the second lens is 1.1 MM; the diameter of the third lens is 4.8MM, and the center thickness is 1.48 MM; the diameter of the combined cemented glass lens of the fourth lens and the fifth lens is 4.8MM, the center thickness is 1.95MM, the diameter of the sixth lens is 4.8MM, and the center thickness is 1.17 MM.

Preferably, the aperture value (F/NO) of the fisheye waterproof lens is F1.4.

Preferably, the field of view (FOV) of the fisheye waterproof lens is more than or equal to 212 degrees, and compared with other fisheye lenses of the same type, the fisheye waterproof lens is large in light transmission amount and good in low illumination.

Preferably, the optical total length of the fisheye lens is 13.57MM

Preferably, the optical refractive indexes of the lenses of the fish-eye lens are respectively a first lens Nd1, a second lens Nd2, a third lens Nd3, a fourth lens Nd4, a fifth lens Nd5 and a sixth lens Nd6, and the Nd1, Nd2, Nd3, Nd4, Nd5 and Nd6 satisfy the following conditions: nd1 is more than or equal to 1.76 and less than or equal to 1.78, Nd2 is more than or equal to 1.47 and less than or equal to 1.49, Nd3 is more than or equal to 1.91 and less than or equal to 1.93, Nd4 is more than or equal to 1.93 and less than or equal to 1.95, Nd5 is more than or equal to 1.68 and less than or equal to 1.7, and Nd6 is more than or equal to 1.79 and less than or equal to 1.81.

The utility model has the advantages that:

1. the utility model discloses an aperture value (F/NO) of camera lens is F1.4, and angle of vision (FOV) is more than or equal to 212, compares other fisheye lenses of the same kind, and the flux is big, and low light is good.

2. The utility model discloses a fisheye lens optics overall length is 13.57mm, and other fisheye lens optics overall lengths are shorter relatively.

Description of the drawings:

in order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic structural view of a short TTL large aperture fisheye waterproof lens of the embodiment of the present invention

The specific implementation mode is as follows:

the technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

As shown in fig. 1, a waterproof lens for large aperture fish-eye with short TTL sequentially includes from the object side to the image side: the lens comprises a first lens 1, a sealing ring 2, a second lens 3, a third lens 4, a diaphragm spacing ring 5, a fourth lens 6, a fifth lens 7, a spacing ring 8 and a sixth lens 9, wherein the first lens 1 is a glass lens with a front convex and back concave shape, the second lens 3 is a double concave glass lens, the third lens 4 is a double convex glass lens, the fourth lens 6 is a double concave glass lens, the fifth lens 7 is a double convex glass lens, and the sixth lens 9 is a double convex glass lens; wherein the fourth lens 6 and the fifth lens 7 are combined as a cemented glass lens. All the lenses are made of glass, and the glass has high temperature resistance.

In this embodiment, the first lens 1 has a diameter of 12MM and a center thickness of 0.85 MM; the diameter of the second lens 3 is 7.5MM, and the center thickness is 1.1 MM; the diameter of the third lens 4 is 4.8MM, and the center thickness is 1.48 MM; the diameter of the combined cemented glass lens of the fourth lens 6 and the fifth lens 7 is 4.8MM, and the central thickness is 1.95 MM; the sixth lens 9 has a diameter of 4.8MM and a center thickness of 1.17 MM.

In this embodiment, the aperture value (F/NO) of the fisheye waterproof lens is F1.4, and compared with other fisheye lenses of the same type, the fisheye waterproof lens has a large light transmission amount and good low illumination.

In this embodiment, the field of view (FOV) of the fisheye waterproof lens is greater than or equal to 212 degrees.

In this embodiment, the total optical length of the fisheye lens is 13.57MM

In the embodiment, the optical refractive indexes of the lenses of the fish-eye lens are respectively the first lens Nd1, the second lens Nd2, the third lens Nd3, the fourth lens Nd4, the fifth lens Nd5, the sixth lens Nd6, the Nd1, the Nd2, the Nd3, the Nd4, the Nd5 and the Nd6, and the following conditions are satisfied: nd1 is more than or equal to 1.76 and less than or equal to 1.78, Nd2 is more than or equal to 1.47 and less than or equal to 1.49, Nd3 is more than or equal to 1.91 and less than or equal to 1.93, Nd4 is more than or equal to 1.93 and less than or equal to 1.95, Nd5 is more than or equal to 1.68 and less than or equal to 1.7, and Nd6 is more than or equal to 1.79 and less than or equal to 1.81.

The aperture value (F/NO) of the present invention satisfies the following condition: F/NO is more than or equal to 2.2 and less than or equal to 1.4; the total optical length TTL meets the following conditions: TTL is less than or equal to 13.57 mm; the lens has the advantages of high pixel and good low-light night vision effect. The lens has the greatest characteristics of short optical total length and large light transmission amount, and can be normally used in an environment of-20 ℃ to 85 ℃; the short optical overall length is suitable for the smaller shell structure in the fields of vehicle-mounted cameras, underwater fishing and the like.

The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides a waterproof camera lens of big light ring flake that TTL is shorter, its characterized in that, waterproof camera lens of flake includes from object space to image space in proper order: the optical lens comprises a first lens (1), a sealing ring (2), a second lens (3), a third lens (4), a diaphragm spacing ring (5), a fourth lens (6), a fifth lens (7), a spacing ring (8) and a sixth lens (9), wherein the first lens (1) is a glass lens with a convex front shape and a concave rear shape, the second lens (3) is a double-concave glass lens, the third lens (4) is a double-convex glass lens, the fourth lens (6) is a double-concave glass lens, the fifth lens (7) is a double-convex glass lens, and the sixth lens (9) is a double-convex glass lens; wherein the fourth lens (6) and the fifth lens (7) are combined into a cemented glass lens.

2. The lens with short TTL and large aperture for preventing fish-eye glare as defined in claim 1, wherein the first lens (1) has a diameter of 12MM and a center thickness of 0.85 MM; the diameter of the second lens (3) is 7.5MM, and the center thickness is 1.1 MM; the diameter of the third lens (4) is 4.8MM, and the central thickness is 1.48 MM; the diameter of the combined cemented glass lens of the fourth lens (6) and the fifth lens (7) is 4.8MM, the central thickness is 1.95MM, and the diameter of the sixth lens (9) is 4.8MM, and the central thickness is 1.17 MM.

3. The lens of claim 1, wherein the lens has an aperture value (F/NO) of F1.4.

4. The TTL larger aperture fish-eye waterproof lens assembly as recited in claim 1, wherein the fish-eye waterproof lens field of view (FOV) is greater than or equal to 212 °.

5. The lens of claim 1, wherein the total optical length of the lens is 13.57 MM.

6. The large aperture fish-eye waterproof lens with short TTL as claimed in claim 1, wherein the optical refractive indexes of the lenses of the fish-eye lens are respectively the first lens Nd1, the second lens Nd2, the third lens Nd3, the fourth lens Nd4, the fifth lens Nd5 and the sixth lens Nd6, and the Nd1, Nd2, Nd3, Nd4, Nd5 and Nd6 satisfy the following conditions: nd1 is more than or equal to 1.76 and less than or equal to 1.78, Nd2 is more than or equal to 1.47 and less than or equal to 1.49, Nd3 is more than or equal to 1.91 and less than or equal to 1.93, Nd4 is more than or equal to 1.93 and less than or equal to 1.95, Nd5 is more than or equal to 1.68 and less than or equal to 1.7, and Nd6 is more than or equal to 1.79 and less than or equal to 1.81.