CN113075833A

CN113075833A - Lens assembly

Info

Publication number: CN113075833A
Application number: CN202110381356.4A
Authority: CN
Inventors: 马宇飞
Original assignee: Hangzhou Hikvision Digital Technology Co Ltd
Current assignee: Hangzhou Hikvision Digital Technology Co Ltd
Priority date: 2021-04-09
Filing date: 2021-04-09
Publication date: 2021-07-06
Anticipated expiration: 2041-04-09
Also published as: CN113075833B

Abstract

Embodiments of the present invention provide a lens assembly comprising: the first round end face is provided with an inwards concave space for transmitting light generated by the light supplementing lamp assembly; a reflective component having a circular cross-section; the light transmitted from the concave space is reflected by the reflecting component and then is emitted out of the second circular end surface to form a rectangular light supplementing area, and the reflecting component is formed between the first circular end surface and the second circular end surface; wherein, reflection component includes: the cross sections of the outer surface of the first scale nail reflecting surface and the outer surface of the second scale nail reflecting surface are both circular; the radius of the cross section where the highest point of the protrusion of the outer surface of the second squama Manis reflecting surface is located is larger than the radius of the cross section where the highest point of the protrusion of the outer surface of the first squama Manis reflecting surface of the first curve is located and is larger than the radius of the cross section where the connecting line of the first squama Manis reflecting surface and the second squama reflecting surface is located.

Description

Lens assembly

Technical Field

The invention relates to the field of video monitoring equipment, in particular to a lens assembly.

Background

Monitoring camera formation of image quality can the variation under the not enough condition of ambient light, and even unable normal work, consequently need be equipped with the light filling lamp to carry out the light filling to the environment in the camera field of view, guarantee the formation of image quality. As shown in fig. 1 and 2, a conventional fill-in light generally comprises a light source 1 and a lens 2, and light emitted from the light source 1 is refracted and reflected by the lens 2 to project a circular light spot 3, which can cover the field of view of a camera. The conventional fill-in lamp has two obvious disadvantages:

firstly, the light spots of the conventional fill-in light are generally distributed in a circular symmetry manner, and the field of view 4 of the camera is generally distributed approximately in a rectangular manner, as shown in fig. 2, a large amount of light energy is lost outside the field of view at the moment, and when the fill-in light is closer to an obstacle, the light can be diffusely reflected to become stray light and enter a lens, so that the imaging quality is reduced.

Second, as shown in fig. 1, a conventional TIR (total internal reflection) lens mainly comprises a projection surface 6 of a core and a reflection surface 7 of a side edge. As shown in fig. 3, when a person stands near the fill light to observe, the light emitting points 8 on the two optical surfaces of the TIR lens can be seen, and since the light emitting points are small, the eye discomfort such as glare is easily caused in a dark environment.

Disclosure of Invention

In view of this, an object of the present invention is to provide a lens assembly, in which a plurality of squash surfaces are spliced to form a reflection assembly of the lens assembly, so that a plurality of reflection light spots are superimposed to form a surface light source, thereby reducing the glare degree and forming rectangular light spots.

One embodiment of the present invention provides a lens assembly comprising:

the first round end face is provided with an inwards concave space longitudinally extending into the lens assembly along the first round end face, and the inwards concave space is used for transmitting light rays generated by the light supplement lamp assembly;

a reflective assembly having a circular cross-section;

the light transmitted from the concave space is reflected by the reflecting component and then is emitted out of the second round end surface to form a rectangular light supplementing area, and the reflecting component is formed between the first round end surface and the second round end surface;

wherein the reflection assembly includes:

the first scale nail reflecting surface and the second scale nail reflecting surface are connected with the first scale nail reflecting surface, and the cross sections of the outer surface of the first scale nail reflecting surface and the outer surface of the second scale nail reflecting surface are both circular;

the longitudinal section of the outer surface of the first squama manicure reflecting surface is a first curve which is radially convex, the longitudinal section of the outer surface of the second squama manicure reflecting surface is a second curve which is radially convex, wherein the radius of the cross section where the highest point of the bulge of the second curve is positioned is larger than the radius of the cross section where the highest point of the bulge of the first curve is positioned, and is larger than the radius of the cross section where the connecting line of the first squama manicure reflecting surface and the second squama manicure reflecting surface is positioned.

In one embodiment, the outer surface of the first and/or second scale reflecting surface is circumferentially provided with a plurality of sub-reflecting surfaces.

In one embodiment, the light reflected by each sub-reflecting surface exits from the second circular end surface to form a sub-reflecting surface light spot, the light transmitted by the concave space exits from the second circular end surface to form a core light spot, and the light supplementing area is formed by all the sub-reflecting surface light spots and the core light spot.

In one embodiment, the concave space has the shape of a circular truncated cone, the top surface of the circular truncated cone is a mold core transmission surface, the side surface of the circular truncated cone is a mold core side wall,

part of light emitted by the light supplement lamp assembly is emitted from the second circular end surface after being transmitted by the transmission surface of the mold core; the other part is refracted from the mold core side wall, reflected by the reflecting component and then emitted through the second circular end face.

In one embodiment, the fill-in light region is rectangular,

any sub-reflecting surface in the plurality of sub-reflecting surfaces is provided with two sub-reflecting surfaces which are axially symmetrical with the sub-reflecting surface and one sub-reflecting surface which is symmetrical with the center of the sub-reflecting surface.

In one embodiment, any one of the first squash surfaces and a second sub-surface located in the second squash surface and connected to the any one of the first sub-surfaces have the same central angle.

In one embodiment, the minimum radius of the second curve of the second squama Manis reflecting surface is greater than the radius of the cross section where the highest point of the first curve of the first squama Manis reflecting surface is located.

In one embodiment, any one of the first squama manicure reflecting surfaces and a second sub reflecting surface which is positioned in the second squama manicure reflecting surface and connected with the any one of the first sub reflecting surfaces have a first step surface at the joint.

In one embodiment, the first curve of the first squama Manis reflecting surface and the second curve of the second squama Manis reflecting surface are convex functions.

In one embodiment, any two adjacent first sub-reflecting surfaces in the first squama reflecting surfaces have second step surfaces at the joint;

any two adjacent second sub-reflecting surfaces in the second squama-like reflecting surfaces are provided with second step surfaces at the joint.

According to the technical scheme, in the embodiment, the outer surface of the reflection assembly is not a continuous curved surface, but a plurality of scale reflection surfaces are spliced, wherein each scale reflection surface can form an independent reflection surface for reflecting emergent light of the light supplement lamp assembly, at least one light spot is formed, and the plurality of light spots are combined to form a rectangular light supplement area. The shape of the light supplementing area is the same as the shape of a light spot formed by each squama reflecting surface, and a rectangular light supplementing area can be formed. For example, when the device is applied to a fill-in light device, a rectangular fill-in area can be correspondingly formed, so that the loss of light energy outside a field of view and the influence on the imaging effect are avoided.

Drawings

The following drawings are only schematic illustrations and explanations of the present invention, and do not limit the scope of the present invention.

Fig. 1 is a schematic structural diagram of a conventional fill-in lamp.

Fig. 2 is a schematic diagram of a fill-in area of a conventional fill-in lamp.

Fig. 3 is a schematic diagram illustrating a light emitting effect of a conventional fill-in lamp.

FIG. 4 is a side view of a first embodiment of a lens assembly of the present invention.

FIG. 5 is an optical schematic of the lens assembly of FIG. 4.

FIG. 6 is a side view of a second embodiment of a lens assembly of the present invention.

FIG. 7 is a front view of the lens assembly of FIG. 6.

FIG. 8 is a schematic illustration of the luminous effect of the lens assembly of FIG. 6.

FIG. 9 is a side view of a third embodiment of a lens assembly of the present invention.

FIG. 10 is a front elevational view of a third embodiment of the lens assembly of the present invention.

FIG. 11 is a schematic structural diagram of a third embodiment of a lens assembly of the present invention.

Detailed Description

In order to more clearly understand the technical features, objects, and effects of the present invention, embodiments of the present invention will now be described with reference to the accompanying drawings, in which like reference numerals refer to like parts throughout.

"exemplary" means "serving as an example, instance, or illustration" herein, and any illustration, embodiment, or steps described as "exemplary" herein should not be construed as a preferred or advantageous alternative.

For the sake of simplicity, the drawings are only schematic representations of the parts relevant to the invention, and do not represent the actual structure of the product. In addition, in order to make the drawings concise and understandable, components having the same structure or function in some of the drawings are only schematically illustrated or only labeled.

FIG. 4 is a side view of a first embodiment of a lens assembly of the present invention. FIG. 5 is an optical schematic of the lens assembly of FIG. 4. As shown in fig. 4 and 5, the present invention provides a lens assembly 100 comprising:

the lens assembly 100 comprises a first round end surface 11, and an inner concave space 12 longitudinally extending into the lens assembly 100 is arranged along the first round end surface 11, and the inner concave space 12 is used for transmitting light generated by the fill-in light assembly;

the reflecting assembly 20, the cross section of the reflecting assembly 20 is circular;

the second round end surface 13, the light transmitted from the concave space 12 is reflected by the reflection component 20 and then is emitted out through the second round end surface 13 to form a rectangular supplementary lighting area 30, and the reflection component 20 is formed between the first round end surface 11 and the second round end surface 13;

wherein, reflection assembly 20 includes:

the first scale reflecting surface 21 and the second scale reflecting surface 22 are connected with the first scale reflecting surface 21, and the cross sections of the outer surface of the first scale reflecting surface 21 and the outer surface of the second scale reflecting surface 22 are circular;

the longitudinal section of the outer surface of the first squama Manis reflecting surface 21 is a first curve which is radially convex, the longitudinal section of the outer surface of the second squama Manis reflecting surface 22 is a second curve which is radially convex, wherein the radius of the cross section where the highest point of the protrusion of the second curve is located is larger than the radius of the cross section where the highest point of the protrusion of the first curve is located, and is larger than the radius of the cross section where the connecting line of the first squama Manis reflecting surface 21 and the second squama Manis reflecting surface 22 is located.

In this embodiment, the center of the first circular end surface 11 of the lens assembly 100 is used as a circular point of the three-dimensional coordinate system of the lens, the optical axis direction of the lens assembly is used as the z-axis direction, and the plane where the first circular end surface 11 is located is used as the xoy plane. Wherein the cross-sectional direction means a direction parallel to the xoy plane, and the longitudinal section direction is a direction passing through the z-axis and perpendicular to the xoy plane.

The concave space 12 has a shape of a circular truncated cone, the top surface of the circular truncated cone is a mold core transmission surface 121, the side surface of the circular truncated cone is a mold core side wall 122, and a part of light emitted by the light supplement lamp assembly is emitted from the second circular end surface 13 after being transmitted from the mold core transmission surface 121; the other part is refracted from the mold core sidewall 122, reflected by the reflection component 20, and then emitted through the second round end surface 13.

As shown in fig. 5, through refraction of the lens assembly 100, light emitted from the second circular end surface 13 forms a light supplementary region 30 on the receiving surface 10, and the receiving surface 10 is used as an x 'o' y 'plane of the three-dimensional coordinate system of the imaging, so that a position of a central dot o' of the light supplementary region 30 corresponds to a position of a dot of the three-dimensional coordinate system of the lens.

The cross section of the reflection assembly 20 is circular, however, in the present embodiment, the outer surface of the reflection assembly 20 is not a continuous curved surface, but a plurality of squama reflecting surfaces are spliced, that is, the cross section of the reflection assembly 20 is a curve which is approximately circular and is formed by combining the curved shapes of the plurality of squama reflecting surfaces. Each squama reflecting surface can form an independent reflecting surface for reflecting emergent rays of the light supplementing lamp assembly, at least one light spot is formed, and the light supplementing area 30 is formed by combining a plurality of light spots. The shape of the light supplement region 30 is the same as the shape of the light spot formed by each of the scale reflecting surfaces, and a light supplement region corresponding to the shape of the scale can be formed by setting the shapes of the plurality of scale reflecting surfaces. For example, when the device is applied to a fill-in light device, a rectangular fill-in area can be correspondingly formed, so that the loss of light energy outside a field of view and the influence on the imaging effect are avoided.

In the present embodiment, the first and second

scale reflecting surfaces

21 and 22 are a pair of scale reflecting surfaces which are connected to each other at a position, wherein the first scale reflecting surface 21 is a scale reflecting surface closer to the first round end surface 11, and the second scale reflecting surface 22 is a scale reflecting surface closer to the second round end surface 13 and having a larger radius of the cross section. The reflective assembly 20 may include not only a pair of squama reflecting surfaces. For example, in the embodiment shown in fig. 4, the reflection assembly 20 includes three squama reflecting surfaces, and when one of the squama reflecting surfaces contacting the first round end surface 11 is the first squama reflecting surface 21, the middle one of the squama reflecting surfaces in this embodiment is the second squama reflecting surface 22; when the middle one of the squama manicure reflecting surfaces is the first squama manicure reflecting surface 21, the second squama manicure reflecting surface 22 is the one of the squama manicure reflecting surfaces in contact with the second round end surface 13 in the present embodiment. By analogy, the reflection assembly in the present embodiment may include a plurality of pairs of squama reflecting surfaces to form more spots to reduce the glare degree of the luminous point.

FIG. 6 is a side view of a second embodiment of a lens assembly of the present invention. FIG. 7 is a front view of the lens assembly of FIG. 6.

As shown in fig. 6 and 7, the present invention provides a lens assembly 100 comprising:

the second round end surface 13, the light transmitted from the concave space 12 is reflected by the reflection component 20 and then is emitted out through the second round end surface 13 to form a light supplement area 30, and the reflection component 20 is formed between the first round end surface 11 and the second round end surface 13;

wherein, reflection assembly 20 includes:

The outer surface of the first squama reflecting surface 21 and/or the outer surface of the second squama reflecting surface 22 are circumferentially provided with a plurality of sub reflecting surfaces 40, and the shape of the supplementary light region 30 is related to the shape of the sub reflecting surfaces 40.

Referring to fig. 8, the present embodiment provides a patch-based squash lens, in which the reflecting surface of the reflecting assembly changes from a continuous curved surface to a squash curved surface formed by splicing a plurality of sub-reflecting surfaces. Light emitted from the light supplementing lamp component forms light spots (such as rectangular light spots) in the same shape after being totally reflected by the sub reflecting surfaces, the light spots are overlapped into a light supplementing area with the same shape, and the light supplementing lamp component has the advantages that: 1. in the aspect of appearance, when a person observes at a near place, each sub-reflecting surface 40 on the curved surface of the squama manitis is a luminous point, and when the density of the sub-reflecting surfaces is large enough, the human eyes consider that the whole surface emits light, so that the glare degree is greatly reduced; 2. in terms of optical effect, because the light spots formed by each sub-reflecting surface are the same, the dependence of the lens on the processing precision can be reduced, and the robustness is improved.

Specifically, the light reflected by each sub-reflecting surface 40 is emitted from the second circular end surface 13 to form a sub-reflecting surface light spot, the light transmitted by the concave space 12 is emitted from the second circular end surface 13 to form a core light spot, and the light supplementing area 30 is formed by all the sub-reflecting surface light spots and the core light spots.

As shown in fig. 6, the uppermost layer of the lens assembly 100 is formed as a step structure, the step thickness is T, preferably T e [1,5] mm, in general, the step structure is a circular disk shape, the diameter is D, preferably D e [5,30] mm, the upper surface of the step is a second circular end surface 13, which is used as an exit surface of the lens assembly 100, the light refracted by the lens assembly 100 finally exits through the second circular end surface 13, the exit surface is generally a plane or a compound eye surface, and the processing technology is generally polishing or scratching.

The concave space 12 has a shape of a circular truncated cone, the top surface of the circular truncated cone is a mold core transmission surface 121, the side surface of the circular truncated cone is a mold core side wall 122, and a part of light emitted by the fill light assembly is emitted from the second circular end surface 13 after being transmitted from the mold core transmission surface 121; the other part is refracted from the mold core sidewall 122, reflected by the reflection component 20, and then emitted through the second round end surface 13.

The inner concave space 12 is formed on the first round end surface 11, the bottom periphery of the first inner concave space 12 forms a circular ring structure, the width of the circular ring structure is d, the preferred d is e [0.2,5] mm, the bottom radius of the inner concave space 12 is r, the preferred r is e [1,5] mm, the side surface of the inner concave space 12 is a mold core side wall 122, the mold core side wall 122 has a mold drawing angle alpha, the preferred a is e [1,30] °, the depth of the inner concave space 12 is h, the preferred h is e [1,10] mm, the top of the inner concave space 12 is a mold core transmission surface 121 which is an optical curved surface, and the optical curved surface has a radian as if the second round end surface 13 is convex.

Further, the shape of the supplementary light region 30 is associated with the arrangement position of the sub-reflecting surfaces 40. In general, each sub-reflecting surface is different, that is, the shape and size of any two sub-reflecting surfaces on the curved surface of the squama is not rotational, translational or mirror symmetric. In the field of surveillance cameras, the most suitable fill-light distribution is a rectangular light spot, that is, the shape of the light spot in fig. 5 is a rectangle with an o' as a center, and since the rectangular shape is a quarter-symmetric pattern, each squash curved surface of the lens assembly 100 will also be a quarter-symmetric structure.

Therefore, in a preferred embodiment, as shown in fig. 7, the fill-in light region 30 has a rectangular shape, each sub-reflecting surface 40 has a rectangular shape, and any sub-reflecting surface 40 of the plurality of sub-reflecting surfaces 40 has two sub-reflecting surfaces arranged axially symmetrically thereto and one sub-reflecting surface arranged centrally symmetrically thereto. Further, any one of the first sub-reflecting surfaces 41 in the first squama manicure reflecting surfaces 21 and the second sub-reflecting surface 42 located in the second squama manicure reflecting surface 22 and connected to any one of the first sub-reflecting surfaces 41 have the same central angle.

That is, the sub-reflecting surfaces 40 on the scale nail curved surface are distributed radially, each circle includes 4n sub-reflecting surfaces, each quadrant includes n sub-reflecting surfaces in the xoy rectangular coordinate system, n is 1,2,3 … (in the legend, n is 6), and an included angle θ of each sub-reflecting surface with respect to the origin o is 360/4n (in the legend, θ is 360/24 is 15).

As shown in fig. 6, the sub-reflecting surface on the curved surface of the scale nail is divided into m layers along the z-axis, where m is 1,2, and 3 … (in the figure, m is 3), and the heights of each layer are h1, h2, and h3 … (generally, h1, h2, h3, and …). The sub-reflecting surfaces are marked with S (i, j), where i is the number of layers (i ═ 1,2, … m) and j is the number of counterclockwise sequences from the positive x-axis.

Since the rectangular shape is a quarter-symmetrical pattern, the scaly curved surface of the lens will also be quarter-symmetrical, e.g. S (2,2) in quadrant I will be mirror symmetrical with S (2,11) in quadrant II about the y-axis, S (2,23) in quadrant IV will be mirror symmetrical with the x-axis, and S (2,14) in quadrant III will be centre symmetrical with the dot O. Meanwhile, S (2,14) of quadrant III is mirror-symmetric with S (2,23) of quadrant IV about the y-axis, S (2,2) of quadrant I is mirror-symmetric with S (2,23) of quadrant IV about the x-axis, and S (2,11) of quadrant II is mirror-symmetric with S (2,14) of quadrant III about the x-axis.

FIG. 9 is a side view of a third embodiment of a lens assembly of the present invention. FIG. 10 is a front elevational view of a third embodiment of the lens assembly of the present invention. FIG. 11 is a schematic structural diagram of a third embodiment of a lens assembly of the present invention.

As shown in fig. 9, the minimum radius of the second curve of the second squama-like reflecting surface 22 is larger than the radius of the cross section where the highest point of the first curve of the first squama-like reflecting surface 21 is located.

Further, the shape of the fill-in area 30 is also related to the curvature of the sub-reflecting surface 40.

Specifically, the curved surface structure characteristics of the scaly nail patch are analyzed by taking the S (1,1) patch as an example, as shown in fig. 9, f (x) is a section line of the S (1,1) patch and xoz patch, and corresponds to a rectangular fill light region, and f (x) has the following characteristics: 1. for any point on the curve, f' (x) ═ df (x)/dx>0, i.e., f (x) is an increasing function; 2. f ((x1+ x2)/2) ≦ (f (x1) + f (x2))/2 for any two points x1 and x2 on the curve, i.e., f (x) is a convex function; 3. preferred curvature K (x) e [0,10] at any point on the curve]Where k (x) is ═ f "(x) |/(1+ f' (x)²)^3/2。

That is, the radial dimensions of the scale reflecting surfaces are all increased layer by layer, and for example, the minimum radial dimension of the scale reflecting surface of the 2 nd layer is larger than or equal to the maximum radial dimension of the scale reflecting surface of the 1 st layer, which is required for practical processing. Each sub-reflecting surface is not naturally connected, small gaps exist, the size of each gap is not more than 1mm, and the sub-reflecting surfaces corresponding to the adjacent squama reflecting surfaces are connected through steps. Specifically, as shown in fig. 11, any one of the first scale reflecting surfaces 41 of the first scale reflecting surfaces 21 and the second scale reflecting surface 42 located in the second scale reflecting surface 42 and connected to any one of the first sub reflecting surfaces 41 have a first step surface 43 at the junction.

As shown in fig. 10, ρ (θ) is a polar coordinate representation of a cross-section line of the S (1,1) plane and the xoy plane, and corresponds to a rectangular fill-in region, and ρ (θ) has the following characteristics: 1. for any two points theta 1 and theta 2 on the curve, rho ((theta 1+ theta 2)/2) is less than or equal to rho (theta 1) + rho (theta 2))/2, namely rho (theta) is a convex function; 2. the curvature J (x) epsilon [0,10] at any point on the preferred curve.

Correspondingly, any two adjacent first sub-reflecting surfaces 41 in the first squama reflecting surfaces 21 have second step surfaces 44 at the joint; any two adjacent second sub-reflecting surfaces 42 of the second squama reflecting surfaces 22 have second step surfaces 44 at the junctions.

In this embodiment, the material of the lens component may be PMMA (polymethyl methacrylate) or PC (polycarbonate), and since the compatibility of the lens component is strong, the same lens may be adapted to a plurality of LED (light emitting diode) light sources, including a light mixing light source.

According to the technical scheme, the embodiment provides the scaly nail lens based on patch splicing, wherein the reflecting surface of the reflecting assembly is changed from a continuous curved surface into a scaly nail curved surface formed by splicing a plurality of sub reflecting surfaces. Light emitted from the light supplementing lamp component forms light spots (such as rectangular light spots) in the same shape after being totally reflected by the sub reflecting surfaces, the light spots are overlapped into a light supplementing area with the same shape, and the light supplementing lamp component has the advantages that: 1. in the aspect of appearance, when a person observes at a near place, each sub-reflecting surface 40 on the curved surface of the squama manitis is a luminous point, and when the density of the sub-reflecting surfaces is large enough, the human eyes consider that the whole surface emits light, so that the glare degree is greatly reduced; 2. in terms of optical effect, because the light spots formed by each sub-reflecting surface are the same, the dependence of the lens on the processing precision can be reduced, and the robustness is improved.

In this document, "a" does not mean that the number of the relevant portions of the present invention is limited to "only one", and "a" does not mean that the number of the relevant portions of the present invention "more than one" is excluded.

Unless otherwise indicated, numerical ranges herein include not only the entire range within its two endpoints, but also several sub-ranges subsumed therein.

The above-listed detailed description is only a specific description of a possible embodiment of the present invention and is not intended to limit the scope of the present invention, and equivalent embodiments or modifications such as combinations, divisions or repetitions of the features without departing from the technical spirit of the present invention are included in the scope of the present invention.

Claims

1. A lens assembly (100) comprising:

the lens assembly (100) comprises a first round end surface (11), wherein an inner concave space (12) longitudinally extending into the lens assembly (100) is arranged along the first round end surface (11), and the inner concave space (12) is used for transmitting light generated by the light supplement lamp assembly;

a reflective assembly (20), the reflective assembly (20) being circular in cross-section;

the light transmitted by the concave space (12) is reflected by the reflecting component (20) and then is emitted out of the second circular end face (13) to form a rectangular light supplementing area (30), and the reflecting component (20) is formed between the first circular end face (11) and the second circular end face (13);

wherein the reflection assembly (20) comprises:

the first scale reflecting surface (21) and the second scale reflecting surface (22) are longitudinally connected with the first scale reflecting surface (21), and the cross sections of the outer surface of the first scale reflecting surface (21) and the outer surface of the second scale reflecting surface (22) are circular;

the longitudinal section of the outer surface of the first scale nail reflecting surface (21) is a first curve which is radially convex outwards, the longitudinal section of the outer surface of the second scale nail reflecting surface (22) is a second curve which is radially convex outwards, wherein the radius of the cross section where the highest point of the bulge of the second curve is located is larger than that of the cross section where the highest point of the bulge of the first curve is located, and is larger than that of the cross section where the connecting line of the first scale nail reflecting surface (21) and the second scale nail reflecting surface (22) is located.

2. Lens assembly (100) according to claim 1, wherein the outer surface of the first and/or second scale reflecting surface (21, 22) is provided circumferentially with a plurality of sub reflecting surfaces (40).

3. A lens assembly (100) according to claim 2, wherein the light reflected by each sub-reflecting surface (40) is emitted from the second circular end surface (13) to form a sub-reflecting surface light spot, the light transmitted by the concave space (12) is emitted from the second circular end surface (13) to form a core light spot, and the supplementary light area (30) is formed by all the sub-reflecting surface light spots and the core light spot.

4. A lens assembly (100) according to claim 1 or 3, wherein the concave space (12) has the shape of a truncated cone, the top surface of which is a core transmission surface (121) and the side surfaces are core side walls (122),

part of light emitted by the light supplement lamp component is emitted from the second round end surface (13) after being transmitted by the mold core transmission surface (121); the other part of the light is refracted from the mold core side wall (122), reflected by the reflecting component (20) and then emitted through the second round end surface (13).

5. A lens assembly (100) according to claim 2, wherein the fill light area (30) is rectangular in shape,

any sub-reflecting surface (40) in the plurality of sub-reflecting surfaces (40) is provided with two sub-reflecting surfaces which are arranged in axial symmetry with the sub-reflecting surface and one sub-reflecting surface which is arranged in central symmetry with the sub-reflecting surface.

6. Lens assembly (100) according to claim 2, wherein any one of the first squash surfaces (21) and a second sub-surface (42) located in the second squash surface (22) and connected to said any one of the first sub-surfaces (41) have the same central angle.

7. A lens assembly (100) according to claim 6, wherein the smallest radius of the second curve of the second squama reflecting surface (22) is larger than the radius of the cross section where the highest point of the protrusion of the first curve of the first squama reflecting surface (21) is located.

8. The lens assembly (100) of claim 7, wherein any one of the first squash surfaces (21) and a second sub-surface (42) located in the second squash surface (42) and connected to the any one of the first sub-surfaces (41) have a first step surface (43) at a junction.

9. A lens assembly (100) according to any of the claims 1 to 3, 5 to 6, wherein the first curve of the first squash reflecting surface (21) and the second curve of the second squash reflecting surface (22) are convex functions.

10. A lens assembly (100) according to claim 9, wherein any two adjacent first sub-reflecting surfaces (41) of the first squama reflecting surfaces (21) have a second step surface (44) at the junction;

any two adjacent second sub-reflecting surfaces (42) in the second squama reflecting surfaces (22) are provided with second step surfaces (44) at the joint.