Zoom illumination lens and illumination device
By designing a zoom illumination lens, utilizing positive focal length lenses and glass spherical lenses, combined with aperture stops and anti-reflective coatings, the problem of poor night vision in high-pixel cameras was solved, achieving efficient supplementary lighting at long distances and adjustable angles, thus improving image clarity at night.
Patent Information
- Application Number
- CN202511701836.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-11-19
- Publication Date
- 2026-02-06
AI Technical Summary
Existing high-pixel cameras have relatively poor night vision clarity compared to daytime performance, with more noise. Traditional infrared LED lighting solutions suffer from problems such as short illumination distance, non-adjustable light output angle, uneven light, and low light efficiency.
A zoom illumination lens is used, including a first lens with positive optical power and a second lens with positive optical power. The lens material is glass spherical. By adjusting the position of the second lens, the beam divergence angle is changed. Combined with the aperture and anti-reflective coating, the light output angle can be adjusted from 9.7° to 31.7°, thereby improving the light utilization efficiency and the uniformity of the light spot.
It achieves a zoom lighting effect with long illumination distance, adjustable illumination angle, uniform light spot, and high luminous efficiency. The total length of the lens is controlled within 26mm, making it suitable for high-definition night vision supplementary lighting.
Smart Images
Figure CN121474524A_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the field of optical technology, in particular to a zoom lighting lens and a lighting device. BACKGROUND
[0002] With the development of security monitoring technology, the definition of monitoring cameras is continuously improved, from the traditional 2 million pixels to the commonly used 5 million pixels and 8 million pixels of super-definition network cameras. However, the night vision effect of the existing high-pixel camera is relatively different from the definition in the daytime, and there are usually many noise points on the picture, resulting in unclear image, so using high-brightness lighting lamps for night light compensation of the camera has become a necessary means to realize high-definition night vision effect.
[0003] The traditional lighting lamp often uses infrared LED lamp, however, the scheme of using infrared LED lamp for light compensation generally has the shortcomings of short irradiation distance, unadjustable light emission angle, uneven light, low light efficiency, etc. SUMMARY
[0004] The main purpose of the present application is to provide a zoom lighting lens and a lighting device, which can provide a zoom lighting lens with long irradiation distance, adjustable irradiation angle, uniform light spot and high light efficiency.
[0005] To achieve the above-mentioned purpose, the present application provides a zoom lighting lens, which comprises a first lens with positive focal power and a second lens with positive focal power arranged in sequence along the direction of incident illumination light, the first lens is fixedly arranged, and the second lens is movably arranged along the optical axis direction to realize the adjustment of the light emission angle of 9.7° to 31.7°, and the light emission efficiency of the zoom lighting lens can reach more than 85%. Among them, the first lens and the second lens are both arranged as glass spherical lenses.
[0006] In an embodiment, the zoom lighting lens further comprises a diaphragm, which is arranged on the side of the first lens facing the illumination light source.
[0007] In an embodiment, the surfaces of the first lens and the second lens are coated with an anti-reflection film.
[0008] In an embodiment, the light entrance surface of the first lens is a plane, and the light exit surface is a convex surface. The light entrance surface of the second lens is a convex surface, and the light exit surface is a convex surface.
[0009] In an embodiment, the focal length of the first lens is f1, and the focal length of the second lens is f2, which satisfies: 2 < f1 < 5, 20 < f2 < 35.
[0010] In an embodiment, the first lens has a refractive index n1, and the second lens has a refractive index n2, and the following conditions are satisfied: 1.80 ≤ n1 ≤ 2.05, and 1.80 ≤ n2 ≤ 2.05.
[0011] In an embodiment, the first lens has a dispersion coefficient v1, and the second lens has a dispersion coefficient v2, and the following conditions are satisfied: 0 < v1 ≤ 45, and 0 < v2 ≤ 45.
[0012] In an embodiment, the first lens has a diameter D1, and the following condition is satisfied: D1 < 20 mm.
[0013] In an embodiment, the zoom lighting lens has an object side diameter IC, and the following condition is satisfied: IC ≤ 1.3 mm.
[0014] The present application also provides a lighting device, which comprises the above-mentioned zoom lighting lens, the zoom lighting lens comprising a first lens with positive focal power and a second lens with positive focal power arranged in sequence along the direction of incident light, the first lens being fixedly arranged, and the second lens being movably arranged along the optical axis to adjust the light emitting angle to 9.7° to 31.7°, and the light emitting efficiency of the zoom lighting lens can reach more than 85%. In the zoom lighting lens, the first lens and the second lens are both glass spherical lenses.
[0015] The technical scheme provided by the present application has the following advantages: the first lens with positive focal power and the second lens with positive focal power are arranged to collect light in the optical system, which can effectively increase the light utilization efficiency of the lens; the light beam divergence angle is changed by moving the second lens to adjust the light emitting angle to 9.7° to 31.7°, so that the lens can project at different distances according to actual requirements; the glass with high refractive index is selected as the lens material to well control the light path, introduce more light, and make the structure more compact, with the total length of the lens controlled within 26 mm; the radius of curvature of the lens is reasonably designed and optimized to make the light emitting efficiency of the lens more than 85%, thereby providing a zoom lighting lens with long projection distance, adjustable projection angle, uniform light spot, and high light emitting efficiency. BRIEF DESCRIPTION OF DRAWINGS
[0016] In order to more clearly illustrate the technical scheme in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative effort based on the drawings shown.
[0017] Figure 1The structure schematic view of the zoom lighting lens in the embodiment provided by the present application is at the wide-angle end; Figure 2 The structure schematic view of the zoom lighting lens in the embodiment provided by the present application is at the wide-angle end; Figure 1 The structure schematic view of the zoom lighting lens in the embodiment provided by the present application is at the wide-angle end; Figure 3 The structure schematic view of the zoom lighting lens in the embodiment provided by the present application is at the wide-angle end; Figure 1 The structure schematic view of the zoom lighting lens in the embodiment provided by the present application is at the wide-angle end; Figure 4 The structure schematic view of the zoom lighting lens in the embodiment provided by the present application is at the wide-angle end; Figure 1 The structure schematic view of the zoom lighting lens in the embodiment provided by the present application is at the wide-angle end.
[0018] Brief Description of the Drawings: 1000, zoom lighting lens; 1, first lens; 2, second lens; 3, diaphragm.
[0019] The implementation, functional features and advantages of the present application will be further described with reference to the embodiments and the accompanying drawings. DETAILED DESCRIPTION
[0020] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative work fall within the protection scope of the present application.
[0021] It should be noted that if the embodiments of the present application involve directionality indication (such as up, down, left, right, front, back, etc.), the directionality indication is only used to explain the relative position relationship, movement condition, etc. between the components in a certain posture, and if the certain posture changes, the directionality indication also changes accordingly.
[0022] In addition, if the embodiments of the present application involve the description of "first", "second" and the like, the description of "first", "second" and the like is only for the purpose of description, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second" can explicitly or implicitly include at least one of the features. In addition, "and / or" or "and / or" appearing throughout the text means that the three parallel schemes are included, taking "A and / or B" as an example, including A scheme, or B scheme, or A and B simultaneously satisfy the scheme. In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the fact that a person skilled in the art can realize it, and when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, and is not within the protection scope required by the present application.
[0023] With the development of security monitoring technology, the definition of the camera used for monitoring is continuously improved, from the traditional 2 million pixels to the commonly used 5 million pixels and 8 million pixels of the super-definition network camera. However, the night vision effect of the existing high-pixel camera is relatively different in definition compared with the day, and there are usually many noise points on the picture, resulting in unclear image, so using high-brightness illuminating lamp for night light compensation for the camera has become a necessary means to realize high-definition night vision effect.
[0024] The traditional illuminating lamp often uses infrared LED lamp, however, the scheme of using infrared LED lamp for light compensation generally has the shortcomings of short irradiation distance, unadjustable light emission angle, non-uniform light, low light efficiency and the like.
[0025] The main purpose of the present application is to provide a zooming illuminating lens and illuminating device, aiming to provide a zooming illuminating lens with long irradiation distance, adjustable irradiation angle, uniform light spot and high light efficiency.
[0026] Please refer to Figure 1 The present application provides a zooming illuminating lens 1000, which comprises a first lens 1 with positive focal power and a second lens 2 with positive focal power arranged in sequence along the direction of incident illuminating light, the first lens 1 is fixedly arranged, and the second lens 2 is movably arranged along the optical axis direction to realize the adjustment of the light emission angle of 9.7° to 31.7°, and the light efficiency of the zooming illuminating lens 1000 can reach more than 85%; wherein the first lens 1 and the second lens 2 are both arranged as glass spherical lenses.
[0027] The technical scheme provided by the present application, by arranging the first lens 1 with positive focal power and the second lens 2 with positive focal power, is conducive to the collection of optical system light, and can effectively increase the light utilization efficiency of the lens; by moving the second lens 2 to change the light beam divergence angle, the adjustment of the light emission angle of 9.7° to 31.7° is realized, so that the projection at different distances can be realized according to the actual needs; by selecting high-refractive glass on the lens material, the light path can be well controlled, more light can be introduced at the same time, and the structure is more compact, and the total length of the lens is controlled within 26mm; by reasonably designing and optimizing the curvature radius of the lens, the light efficiency of the lens can reach more than 85%, thereby providing a zooming illuminating lens with long irradiation distance, adjustable irradiation angle, uniform light spot and high light efficiency.
[0028] Further, the zooming illuminating lens 1000 further comprises a diaphragm 3, which is arranged on the side of the first lens 1 facing the illuminating light source. The diaphragm 3 limits the light beam aperture on the optical axis, blocks part of the light, thereby reducing the light spot and improving the image contrast, and also plays a role in improving the image quality.
[0029] Further, the surfaces of the first lens 1 and the second lens 2 are coated with an anti-reflection film. By setting the anti-reflection film, internal stray reflection can be inhibited, the light can be ensured to propagate along the designed path, the center and edge illumination consistency can be maintained, thereby ensuring the uniformity of the light spot, and the reflectivity of the lens can be significantly reduced, the transmissivity can be increased, thereby improving the light emitting efficiency of the lens.
[0030] Specifically, in a preferred embodiment, referring to Figure 1 , the light entrance surface of the first lens 1 is a plane, and the light exit surface is a convex surface; the light entrance surface of the second lens 2 is a convex surface, and the light exit surface is a convex surface.
[0031] Further, the focal length of the first lens 1 is f1, and the focal length of the second lens 2 is f2, which satisfies 2 < f1 < 5 and 20 < f2 < 35. This embodiment is a preferred embodiment. By combining different lenses and reasonably distributing the optical power of the lenses, the light spot of the entire lens is more uniform, and the light emitting efficiency is high.
[0032] Further, the refractive index of the first lens 1 is n1, and the refractive index of the second lens 2 is n2, which satisfies 1.80 ≤ n1 ≤ 2.05 and 1.80 ≤ n2 ≤ 2.05. This embodiment is a preferred embodiment. By combining different lenses and reasonably distributing the refractive index of the lenses, the zoom lighting lens 1000 has high light emitting efficiency.
[0033] Further, the dispersion coefficient of the first lens 1 is v1, and the dispersion coefficient of the second lens 2 is v2, which satisfies 0 < v1 ≤ 45 and 0 < v2 ≤ 45. This embodiment is a preferred embodiment. By combining different lenses and reasonably distributing the dispersion coefficient of the lenses, the zoom lighting lens 1000 has high light emitting efficiency.
[0034] In an embodiment provided by the present application, the diameter of the second lens 2 is D1, and the object side diameter of the zoom lighting lens 1000 is IC, which satisfies D1 < 20 mm and IC ≤ 1.3 mm. By limiting the numerical relationship of the above optical system characteristics, the aperture of the zoom lighting lens 1000 can be avoided to be too large, so as to meet the installation space requirement of the final product, and the miniaturization of the lens can be realized.
[0035] It should be noted that the basic parameter table of the zoom lighting lens 1000 in an embodiment provided by the present application is shown in Table 1, wherein the units of the curvature radius, the thickness and the half diameter are millimeters (mm).
[0036] Table 1
[0037] Please refer toFigures 3-4 are spot simulation diagrams of the zoom lighting lens 1000 in the present embodiment at the wide-angle end 2.8 meters and the telephoto end 12.5 meters, and it can be seen from the diagrams that the spot of the zoom lighting lens 1000 at the farthest distance at different light-emitting angles can still ensure good uniformity and high illuminance, thereby indicating that the light-emitting efficiency of the lens is very high.
[0038] In the present embodiment, the object-side half-cone angle of the zoom lighting lens 1000 is 80°, the object-side diameter is 1.3 mm, the wide-angle end light-emitting angle is 9.71°, the telephoto end light-emitting angle is 31.75°, a 1.6-meter-diameter uniform illumination spot can be achieved at a 2.8-meter object distance at the wide-angle end, a 2.1-meter-diameter uniform illumination spot can be achieved at a 12.5-meter object distance at the telephoto end, and the continuous zoom light effect between the maximum and minimum angles can reach more than 85%, which can replace the most commonly used fixed-focus imaging lamp of any angle between 9.7° and 31.7°.
[0039] The present application also proposes a lighting device, which comprises the above-mentioned zoom lighting lens 1000, and the specific structure of the zoom lighting lens 1000 is referred to the above-mentioned embodiments. Since the zoom lighting lens 1000 of the present lighting device adopts all the technical solutions of the above-mentioned embodiments, it at least has all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, which will not be repeated here.
[0040] The above-mentioned is only an exemplary embodiment of the present application, and does not limit the patent scope of the present application, and any equivalent structural transformation made by using the content of the present application specification and drawings, or direct / indirect application in other related technical fields is included in the patent protection scope of the present application.
Claims
1. A zoom illumination lens, characterized in that, The lens includes a first lens with positive optical power and a second lens with positive optical power arranged sequentially along the incident direction of the illumination light. The first lens is fixedly set, and the second lens is movable along the optical axis to achieve an adjustment of the light output angle from 9.7° to 31.7°. The luminous efficiency of the zoom illumination lens can reach more than 85%. Both the first lens and the second lens are configured as glass spherical lenses.
2. The zoom illumination lens as described in claim 1, characterized in that, The zoom illumination lens also includes an aperture stop, which is positioned on the side of the first lens facing the illumination source.
3. The zoom illumination lens as described in claim 1, characterized in that, Both the first lens and the second lens have an anti-reflective coating on their surfaces.
4. The zoom illumination lens as described in claim 1, characterized in that, The light-incident surface of the first lens is a plane, and the light-outceasing surface is a convex surface; The light-incident surface of the second lens is convex, and the light-exit surface is also convex.
5. The zoom illumination lens as described in claim 1, characterized in that, The focal length of the first lens is f1, and the focal length of the second lens is f2, satisfying: 2 < f1 < 5, 20 < f2 < 35.
6. The zoom illumination lens as described in claim 1, characterized in that, The first lens has a refractive index of n1, and the second lens has a refractive index of n2, satisfying: 1.80≤n1≤2.05, 1.80≤n2≤2.
05.
7. The zoom illumination lens as described in claim 1, characterized in that, The first lens has a dispersion coefficient of v1, and the second lens has a dispersion coefficient of v2, satisfying the following: 0 < v1 ≤ 45, 0 < v2 ≤ 45.
8. The zoom illumination lens as described in claim 1, characterized in that, The diameter of the first lens is D1, which satisfies: D1 < 20 mm.
9. The zoom illumination lens as described in claim 1, characterized in that, The object diameter of the zoom illumination lens is IC, which satisfies: IC≤1.3mm.
10. A lighting device, characterized in that, Includes the zoom illumination lens as described in any one of claims 1 to 9.