CN-121995606-A - Day and night confocal folding super lens and image acquisition equipment

Abstract

The application relates to a day and night confocal folding super-lens and image acquisition equipment, which belong to the field of optical lenses, wherein the lens has focus consistency in a visible light wave band and an infrared wave band, and comprises six lenses sequentially arranged from an object plane to an image plane along an optical axis, wherein at least one lens is a super-surface lens, and the other lenses are non-super-surface lenses. The application reduces the volume and weight of the lens of the optical system by utilizing the technical scheme of the super surface, is convenient to integrate into a day and night confocal system, and realizes the miniaturization, light weight and integration design.

Inventors

• WANG JIAOJIAO
• LI XINGYI
• XING YUANYUAN

Assignees

• 杭州纳境科技有限公司

Dates

Publication Date

20260508

Application Date

20260227

Priority Date

20250625

Claims (13)

1. 1. The day and night confocal folding super lens is characterized in that the lens has focus consistency in a visible light wave band and an infrared wave band, and six lenses are sequentially arranged from an object plane to an image plane along an optical axis, wherein at least one lens is a super-surface lens, and the other lenses are non-super-surface lenses; The lens satisfies the following conditions: ; Wherein, the The thickness of the super surface substrate of the day and night confocal super lens is, For the total length of the optical system, MTF value for the central field of view.
2. 2. The day and night confocal folding super lens of claim 1, wherein said lens comprises a first lens, a second lens, a third lens, a fourth lens, a fifth lens and a sixth lens which are arranged in order from an object plane to an image plane along an optical axis, wherein at least one lens is a super-surface lens, and the rest lenses are spherical and aspherical lenses.
3. 3. The day and night confocal refractive ultrasound lens of claim 2, wherein said sixth lens is a super surface lens, said first lens, third lens, fourth lens and fifth lens are spherical lenses, and said second lens is an aspherical lens.
4. 4. The day and night confocal folding super lens of claim 3, wherein said third lens and fourth lens are cemented lenses.
5. 5. The day and night confocal super refractive lens of claim 3, wherein said first lens is a lens with positive focal power, the object side surface of which is convex, and the image side surface of which is concave; The second lens is a lens with negative focal power, the object side surface of the second lens is a convex surface, the image side surface of the second lens is a concave surface, and both the object side surface and the image side surface of the second lens are aspheric surfaces; the third lens is a spherical lens with negative focal power, the object side surface of the third lens is a concave surface, the image side surface of the third lens is a concave surface, and the object side surface and the image side surface of the third lens are both spherical surfaces; the fourth lens is a spherical lens with positive focal power, and the object side surface of the fourth lens is a convex surface, and the image side surface of the fourth lens is a convex surface; The fifth lens is a lens with positive focal power, the object side surface of the fifth lens is a convex surface, the image side surface of the fifth lens is a concave surface, and the object side surface and the image side surface of the fifth lens are spherical surfaces; the sixth lens is a super-surface lens, the object side surface of the sixth lens is a plane, and the image side surface of the sixth lens is provided with microstructure arrangement.
6. 6. The day and night confocal super-refractive lens according to claim 2, wherein the distance from the center of the optical axis of the object side of said first lens to the object plane is L, wherein .3m。
7. 7. The day and night confocal refractive ultrasound lens of claim 1, wherein said lens has a central field of view MTF value of Wherein 。
8. 8. The day and night confocal folding super lens of claim 1, wherein the maximum lens diameter D of said lens satisfies: 。
9. 9. The day and night confocal super-refractive lens of claim 1, wherein the relative illuminance of said lens The method meets the following conditions: 。
10. 10. the day and night confocal super-lens of claim 1, wherein the angle of view of said lens The method meets the following conditions: 。
11. 11. the day and night confocal folding ultrasound lens of claim 1, further comprising a diaphragm.
12. 12. An image acquisition device comprising the confocal night-time refractive ultrasound lens and the image sensor according to any one of claims 1-11.
13. 13. The image acquisition device of claim 12, wherein: the lens has focus consistency in a visible light band and an infrared band and is used for generating a clear image without focusing under a day-night alternating environment; The device is suitable for an on-board driving assistance system or a security monitoring system.

Description

Day and night confocal folding super lens and image acquisition equipment Technical Field The invention belongs to the field of optical lenses, and particularly relates to a day-night confocal folding super lens and image acquisition equipment. Background In the fields of security monitoring and vehicle-mounted, a camera is required to have a day-night confocal function, and the camera is mainly used for meeting the high-quality imaging requirements in all-weather and complex environments. The day is mainly visible light, and the night is dependent on infrared light or low-illumination environment. The security monitoring needs all-weather work, imaging quality in the daytime and at night can not be reduced, and the vehicle-mounted camera is used for assisting driving (such as reversing images, a vehicle recorder, an ADAS and the like), so that driving safety at night is important. The common lens has different focus positions under visible light and infrared light, and has slower focusing speed under low illumination condition, which may cause image blurring at night and limited applicable scene. The day and night confocal lens does not need manual adjustment, can automatically adapt to illumination change, provides clear images at night, and helps drivers to identify roads and obstacles. The day and night confocal lens comprises an optical lens group, an aperture mechanism, an automatic focusing mechanism, a zooming mechanism, an infrared correction mechanism, an optical filter switching mechanism, a shell and sealing structure, a temperature compensation mechanism, an electronic control module, an interface and connecting component and an auxiliary functional module. These components work cooperatively to ensure that the lens provides high quality imaging during both day and night, adapting to complex lighting and environmental conditions. Wherein the optical lens group is a key part of the day-night confocal lens. The resolution ratio of the traditional day-night confocal lens in an infrared light wave band is generally lower than that of the traditional day-night confocal lens in a visible light wave band, the detail performance of night imaging is affected, the relative illumination is low, the edge image is dark, and the image viewing is affected. Disclosure of Invention The application provides a day-night confocal folding super lens and image acquisition equipment, which at least solve the technical problems in the prior art. The embodiment of the application provides a day-night confocal folding super lens, which has focus consistency in a visible light wave band and an infrared wave band, and sequentially comprises six lenses from an object plane to an image plane along an optical axis, wherein at least one lens is a super-surface lens, and the other lenses are non-super-surface lenses; The lens satisfies the following conditions: ; Wherein, the The thickness of the super surface substrate of the day and night confocal super lens is,For the total length of the optical system,MTF value for the central field of view. In an embodiment, the lens includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens and a sixth lens, which are sequentially disposed from an object plane to an image plane along an optical axis, wherein at least one lens is a super-surface lens, and the other lenses are spherical and aspherical lenses. In an embodiment, the sixth lens is a super-surface lens, the first lens, the third lens, the fourth lens and the fifth lens are spherical lenses, and the second lens is an aspherical lens. In one embodiment, the third lens and the fourth lens are cemented lenses. In one embodiment, the first lens element is a lens element with positive refractive power, wherein the object-side surface of the first lens element is convex, the image-side surface of the first lens element is concave, the object-side surface of the first lens element and the image-side surface of the second lens element are both spherical, the object-side surface of the second lens element is convex, the image-side surface of the second lens element is concave, the object-side surface of the third lens element is aspheric, the object-side surface of the third lens element is concave, the image-side surface of the third lens element is concave, the object-side surface of the fourth lens element is spherical, the object-side surface of the fourth lens element is convex, the image-side surface of the fourth lens element is convex, the object-side surface of the fourth lens element is spherical, the object-side surface of the fifth lens element is convex, the object-side surface of the fifth lens element is concave, the object-side surface of the sixth lens element is spherical, the object-side surface of the third lens element is planar, and the image-side surface of the fourth lens element is arranged in a microstructure. In one embodiment, the distance from the center of the optical axis of the objec