CN115877579A - Zoom light supplementing system and camera - Google Patents

Abstract

The application discloses light filling system and camera zoom includes: a light source, a shaping lens, a synchronous multi-surface optical SMS lens, a zoom lens and a zoom driving motor; the light emitted by the light source enters the shaping lens, the shaping lens comprises a rectangular light emitting surface, and the light emitted by the light source is shaped by the shaping lens and then emitted to the SMS lens through the rectangular light emitting surface; the SMS lens adjusts the shape of the emergent wave front and homogenizes the emergent light to obtain a corresponding emergent rectangular light spot and transmits the emergent rectangular light spot to the zoom lens. According to the method and the device, the SMS lens is arranged behind the shaping lens, and the SMS lens adjusts the shape of the emergent wavefront to change the internal illumination distribution, so that the illumination of the light spots can be kept basically uniform in the zooming process. The light emitting surface of the front section shaping lens is rectangular, the SMS lens is used as a new light emitting surface when being designed, and the designed light spot of the SMS lens is basically unchanged and can keep rectangular light spots. The shape of the facula is rectangular, the facula is attached to the field angle, the lighting effect is high, and glare is little.

Description

Zoom light supplementing system and camera

Technical Field

The application relates to the technical field of optical design, in particular to a zooming and light supplementing system and a camera.

Background

The combination of the multi-purpose LED and the secondary lens in the security monitoring field is used for supplementing light for the camera, the problem that images are dark and have no permeation due to insufficient illumination of scenes at night can be well solved by the aid of the light supplementing mode, and the camera is suitable for various scenes. However, for the zoom lens, a light supplement lens with various angles such as near light, far light, even middle light and the like is usually needed to meet the requirements of the field angle and the distance of the full focus section, and the mode needs to use the combination of multiple light sources and multiple lenses, so that on one hand, the cost of devices is increased, and the energy is wasted; on the other hand, the light supplement system occupies a larger space, so that the whole structure of the camera is relatively overstaffed. Moreover, the lighting effect of a conventional LED large-angle light source is low, the shape of the light spot is circular, the illumination distribution inside the light spot cannot be adjusted when the light source is determined, the uniformity is poor, and the light supplementing effect is poor.

Disclosure of Invention

The embodiment of the application provides a zooming and light supplementing system and a camera, and aims to solve the problems that the zooming and light supplementing system in the prior art is high in cost, bulky in structure and poor in light supplementing effect.

The application provides a zoom light filling system, includes: a light source, a shaping lens, a synchronous multi-surface optical SMS lens, a zoom lens and a zoom driving motor; the zooming driving motor drives the zooming lens to move and zoom;

the light emitted by the light source enters the shaping lens;

the shaping lens comprises a rectangular light emitting surface, and the shaping lens shapes the light emitted by the light source and then emits the light to the SMS lens through the rectangular light emitting surface; the SMS lens adjusts the shape of the emergent wavefront and homogenizes the emergent light to obtain a corresponding emergent rectangular light spot and transmits the emergent rectangular light spot to the zoom lens.

Further, the shaping lens comprises a rectangular light-emitting surface Total Internal Reflection (TIR) configuration lens; the TIR configuration lens is used for collecting and homogenizing the light emitted by the light source to emit light.

Further, the TIR configuration lens also comprises a light inlet and a reflecting surface, wherein the reflecting surface is an inverted bowl mouth inclined surface with a rectangular boundary.

Furthermore, the light inlet comprises a top light inlet surface and a side wall light inlet surface, the top light inlet surface is a smooth free-form surface with a rectangular boundary, and the side wall light inlet surface is an inclined surface for lofting of the rectangular opening; the rectangular light emitting surface is a compound eye array surface.

Further, the SMS lens includes a lenticular configuration lens.

Furthermore, in the plane dimension of the SMS lens, the boundary point of the light-emitting surface of the shaping lens is used as an extended light source boundary, the emergent light of the boundary point is used as an edge light, and a ridge point chain of the same-step smooth surface and the synchronous light-emitting surface is alternately constructed by utilizing the catadioptric law and adjusting the curvature of the emergent wavefront.

Furthermore, in the three dimensions of the SMS lens, a rib point chain is constructed by taking a point on the ridge point chain as a starting point, and the same-step smooth surface and the synchronous light emitting surface are obtained through point cloud interpolation.

Further, the zoom lens includes a positive focal length lens.

Further, the positive focal length lens comprises a first optical surface and a second optical surface, wherein at least one optical surface is convex in shape.

In another aspect, the present application provides a camera, including: the system comprises a zoom lens, a control panel and any one of the zoom lens and the fill light system;

the control panel is used for controlling the zoom lens to zoom and synchronously controlling the zoom driving motor to move the zoom lens so that the light-emitting angle of the zoom light supplement system is matched with the field angle of the zoom lens.

The application provides a light filling system zooms, includes: a light source, a shaping lens, a synchronous multi-surface optical SMS lens, a zoom lens and a zoom driving motor; the zooming driving motor drives the zooming lens to move and zoom;

the light emitted by the light source enters the shaping lens;

the shaping lens comprises a rectangular light-emitting surface, and the light emitted by the light source is shaped by the shaping lens and then emitted to the SMS lens through the rectangular light-emitting surface; the SMS lens adjusts the shape of the emergent wavefront and homogenizes the emergent light to obtain a corresponding emergent rectangular light spot and transmits the emergent rectangular light spot to the zoom lens.

The technical scheme has the following advantages or beneficial effects:

in the application, the zooming and light supplementing system comprises a light source, a shaping lens, a synchronous multi-surface optical SMS lens, a zooming lens and a zooming driving motor; the zoom driving motor drives the zoom lens to move for zooming. The shaping lens comprises a rectangular light emitting surface, and the shaping lens is used for shaping the light emitted by the light source and then emitting the light to the SMS lens through the rectangular light emitting surface; the SMS lens adjusts the shape of the emergent wave front and homogenizes the emergent light to obtain a corresponding emergent rectangular light spot and transmits the emergent rectangular light spot to the zoom lens. According to the method and the device, the SMS lens is arranged behind the shaping lens, and the shape of the emergent wave front is adjusted by the SMS lens to change the internal illumination distribution, so that the illumination of the light spots can be kept basically uniform in the zooming process. The light emitting surface of the front section shaping lens is rectangular, the SMS lens is used as a new light emitting surface when being designed, and the designed light spot of the SMS lens is basically unchanged and can keep rectangular light spots. The light spots are rectangular, are attached to the field angle, and have high lighting effect and less glare. The zoom light supplement imaging system is low in cost and good in light supplement effect.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a zoom fill-in imaging system provided in the present application;

FIG. 2 is a schematic view of a shaping lens structure provided herein;

FIG. 3 is a schematic view of an SMS lens construction provided herein;

FIG. 4 is a schematic view of a zoom lens provided herein;

fig. 5 is a schematic structural diagram of another zoom fill-in imaging system provided in the present application.

Detailed Description

To make the purpose and embodiments of the present application clearer, the following will clearly and completely describe the exemplary embodiments of the present application with reference to the attached drawings in the exemplary embodiments of the present application, and it is obvious that the described exemplary embodiments are only a part of the embodiments of the present application, and not all of the embodiments.

It should be noted that the brief descriptions of the terms in the present application are only for the convenience of understanding the embodiments described below, and are not intended to limit the embodiments of the present application. These terms should be understood in their ordinary and customary meaning unless otherwise indicated.

The terms "first," "second," "third," and the like in the description and claims of this application and in the above-described drawings are used for distinguishing between similar or analogous objects or entities and not necessarily for describing a particular sequential or chronological order, unless otherwise indicated. It is to be understood that the terms so used are interchangeable under appropriate circumstances.

The terms "comprises" and "comprising," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a product or apparatus that comprises a list of elements is not necessarily limited to all elements expressly listed, but may include other elements not expressly listed or inherent to such product or apparatus.

The term "module" refers to any known or later developed hardware, software, firmware, artificial intelligence, fuzzy logic, or combination of hardware and/or software code that is capable of performing the functionality associated with that element.

Finally, it should be noted that: the above embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present application.

The foregoing description, for purpose of explanation, has been described with reference to specific embodiments. However, the illustrative discussions above are not intended to be exhaustive or to limit the embodiments to the precise forms disclosed above. Many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles and the practical application, to thereby enable others skilled in the art to best utilize the embodiments and various embodiments with various modifications as are suited to the particular use contemplated.

Fig. 1 is a schematic structural diagram of a zoom light supplement system provided in the present application, including: a light source 11, a shaping lens 12, a synchronous multi-surface optical SMS lens 13, a zoom lens 14, and a zoom driving motor 15; the zoom driving motor 15 drives the zoom lens 14 to move for zooming; further comprises a lens holder 16; the zoom lens 14 is fixed by a lens holder 16;

the light emitted by the light source 11 enters the shaping lens 12;

the shaping lens 12 comprises a rectangular light-emitting surface, and after shaping the light emitted by the light source, the light is emitted to the SMS lens 13 through the rectangular light-emitting surface; the SMS lens 13 adjusts the shape of the emergent wavefront and homogenizes the emergent light to obtain a corresponding emergent rectangular light spot, and the emergent rectangular light spot is emitted to the zoom lens 14.

As shown in fig. 1, the zoom fill-in light imaging system mainly includes an optical system composed of four parts, i.e., a light source, a shaping lens, an SMS lens, and a zoom lens, and a driving system composed of a lens holder and a zoom driving motor.

The light source comprises a Light Emitting Diode (LED) light source or a high-power integrated plane (COB) light source. The light source is conventional LED light source, and the general luminous angle 50% light intensity full angle 120 or 90 etc. and the packaging form includes SMD, CSP, COB etc. it should be explained that COB packaging form's light source is because great light emitting area, and the small angle grading is difficult to realize in the conventional light filling scheme, can use the COB light source in this application. Compared with the conventional circular zooming and light supplementing system, the system can use a COB integrated light source, has high power consumption, and can meet the requirement of long-focus high illumination by one set.

Fig. 2 is a schematic structural view of a shaping lens provided in the present application, where the shaping lens includes a TIR-configured lens with a rectangular light emitting surface; the TIR configuration lens is used for collecting and homogenizing the light emitted by the light source.

The TIR configuration lens further comprises a light inlet 21 and a reflecting surface 22, wherein the reflecting surface is an inverted bowl-shaped opening inclined surface with a rectangular boundary. The TIR-configuration lens further comprises a rectangular light exit surface 23.

The light inlet comprises a top light inlet surface 24 and a side wall light inlet surface 25, the top light inlet surface is a smooth free-form surface with a rectangular boundary, and the side wall light inlet surface is an inclined surface for lofting of a rectangular opening; the rectangular light-emitting surface is a compound eye array surface 26.

The shaping lens is a rectangular light-emitting surface TIR-shaped lens and mainly comprises a light inlet, a reflecting surface and a light-emitting surface, wherein the reflecting surface is a reversed bowl mouth inclined surface with a rectangular boundary. As shown in fig. 2. The light inlet comprises a top light inlet surface and a side wall light inlet surface. The top light inlet surface is a rectangular smooth free-form surface with a boundary and is used for converging light rays entering the top light inlet surface and reaching the light outlet surface. The side wall light inlet surface is a rectangular opening lofting inclined surface, and is used for refracting and reflecting light rays incident to the side wall light inlet surface to reach the light outlet surface under the combined action of the inclined surface and the reflecting surface. The light reaching the light-emitting surface is in a divergent form, and the illumination distribution is not uniformly influenced by the lens structure. The light emitting surface is a compound eye array surface, and light reaching the light emitting surface is further homogenized and emitted under the action of the compound eye microstructure. In summary, the specific role of the shaping lens is: 1. converging, namely reducing the divergence angle of the light source large-angle light emitted through the lens; 2. shaping, wherein the light beam after passing through the lens can be regarded as a light beam taking a rectangular light-emitting surface as a light source; 3. and light is homogenized, and the fly-eye structure of the light-emitting surface of the lens optimizes the illumination distribution of the light-emitting surface and the uniformity of an emergent light beam.

Fig. 3 is a schematic view of an SMS lens structure provided in the present application, the SMS lens including a lens of a double convex configuration. In the plane dimension of the SMS lens, the boundary point of the exit surface of the shaping lens is used as an extended light source boundary, the exit ray of the boundary point is used as an edge ray, and a ridge point chain of the step-by-step smooth surface 31 and the synchronous exit surface 32 is alternately constructed by using the catadioptric law. In the three-dimensional aspect of the SMS lens, a rib point chain is constructed by using a point on the ridge point chain as a starting point, and the same-step smooth surface 31 and the synchronous light emitting surface 32 are obtained through point cloud interpolation.

The SMS lens is a biconvex lens, which mainly comprises a same-step light emitting surface and a synchronous light emitting surface, as shown in fig. 3. The SMS lens introduced and adjusted a three-dimensional simultaneous multi-surface design approach. In the plane dimension, the boundary point of the light-emitting surface of the shaping lens is used as an extended light source boundary, the emergent light of the boundary point is used as an edge light, the optical paths of all the light from the incident wavefront to the corresponding interval of the emergent wavefront are kept constant, and the refraction and reflection are used for determining and adjusting the curvature law of the emergent wavefront to alternately construct a ridge point chain of the same-step light-emitting surface and the synchronous light-emitting surface. And in the other direction, constructing a plurality of rib point chains by taking points on the ridge point chain as starting points, and finally obtaining the same-step smooth surface and the synchronous light-emitting surface through point cloud interpolation. The improvement point is that the emergent wavefront shape is gradually adjusted in the design, corresponding emergent light spots and light distribution curves are obtained through simulation, the illumination distribution is gradually optimized, the uniformity is improved, and the emergent light spots are uniform rectangular light spots. The improvement process mainly comprises a cycle: and substituting the initial emergent wavefront shape into an obtained SMS lens and simulating to obtain the corresponding spot shape and illumination distribution, if the result does not meet the expectation, increasing or decreasing the curvature of the emergent wavefront, further substituting into the obtained new SMS lens, and simulating and comparing again. To summarize, the specific roles of the SMS lens are: 1. keeping the rectangular shape of the light spot, making the edge light falling point be a rectangle when the light spot is expanded to three dimensions, and finally, the light spot is in the rectangle according to the edge light principle. 2. Adjusting the uniformity of the light spots by changing the shape of the wave front; 3. adjusting the divergence angle of the emergent ray;

the zoom lens includes a positive focal length lens. The positive focal length lens comprises a first optical surface and a second optical surface, wherein at least one optical surface is convex in shape.

Fig. 4 is a schematic view of a zoom lens provided by the present application, which is a lens with a positive focal length and mainly includes a first optical surface 41 and a second optical surface 42. The first and second optical surface types include spherical, aspherical, and free-form surfaces, and the first and second optical surface shape types include: convex surface, plane surface, concave surface, wherein at least one surface is convex surface and makes the actual focal length of the lens be positive focal length. The zoom lens is supported by a lens support, and the lens support is connected with a driving motor to drive the lens to move through a motor driving support. As shown in fig. 4, after the light beam exits through the SMS lens, the light emitting form of the light beam can be regarded as a uniformly spread light source with a certain divergence angle, which uses the synchronous light exiting surface of the SMS lens as the light emitting surface. This light source is in the object side position of the zoom lens, the range of movement of the zoom lens being defined by the interval of a first position 43 and a second position 44, as shown in fig. 4. When the zoom lens is at the first position, the distance between the zoom lens and the SMS lens is smaller than the focal length of the lens, according to the geometrical optics principle, the diffusion angle of the light beam after passing through the zoom lens is further increased, and the large-angle light beam can be matched with the lens to obtain a small-power large-field angle. When the zoom lens is at the second position, the distance between the zoom lens and the SMS lens is equal to or slightly larger than the focal length of the lens, the actual distance is determined by the condition that the design ensures that the beam angle is minimum, according to the geometrical optics principle, the light beams are converged into a small angle to be emitted after passing through the zoom lens, and the small angle light beams can be adapted to the large-power and small-field angle of the lens. Because the light beams are uniformly distributed in a rectangular shape after passing through the SMS lens, the shapes of the light spots are not changed in the zooming process, and the illumination distribution can be basically kept uniform.

Fig. 5 is a schematic structural diagram of a camera provided by the present application, including: a zoom lens 51, a control panel 52 and a zoom fill-in system 53;

the control board 52 is configured to control the zoom lens 51 to zoom, and synchronously control a zoom driving motor in the zoom light supplement system to move the zoom lens so that a light emitting angle of the zoom light supplement system matches a field angle of the zoom lens.

The zooming and light supplementing system is applied to a camera. A zoom motor of the zoom lens is connected with the control panel through a connecting wire, and a zoom driving motor in the zoom light supplement system is connected with the control panel through a connecting wire. Before the zoom lens is used, the position of the zoom lens when the light-emitting angle of the zoom light supplement system is slightly larger than the field angle is determined according to the field angle of each multiplying power of the zoom lens, and the position is used as a control program and written into the control panel. When the control panel is used for controlling the zoom lens to zoom, the zoom driving motor is synchronously controlled according to the control program so that the light-emitting angle of the zoom light supplement system is matched with the field angle of the zoom lens.

The illumination in the zooming process of the zooming and light supplementing system is controllable, and the lens designed by the SMS method is arranged behind the light emitting surface of the TIR lens, so that the shape of the wave front can be adjusted to change the internal illumination distribution. In this way, the spot illumination may remain substantially uniform during zooming. The zoom range is large, and the light-emitting angle is changed by moving the driving device due to the adoption of the large-aperture long-focus lens, so that the change range of the whole light-emitting angle is large. The light spot is rectangular, the shape fits the field angle, the lighting effect is high, glare is less, the light-emitting surface of the front-section TIR lens is rectangular, the front-section TIR lens is used as a new light-emitting surface when the SMS lens is designed, and the light spot is basically unchanged by the SMS lens design method, so that the rectangular light spot can be kept. The system has high power, adopts a large-area COB light source, has high power consumption of a single light source, and can meet the requirement of long focus and high illumination of the system. The system is high in luminous efficiency, the TIR lens is adopted at the front end for condensation, high luminous efficiency can be guaranteed under a COB large-area light source, and the high luminous efficiency design of an extended light source is achieved.

The optical system of plastic lens, SMS lens and zoom lens is passed through to this application, reaches rectangle and zooms, high light efficiency, illuminance effect such as adjustable. The light source is an LED light source, especially a large-area COB light source can be used, the power consumption of the light source is high, and the zooming light supplement device can realize high intensity required by remote light supplement only by using 1 light source. The shaping lens adopts a rectangular TIR structure, the light source angle is converged through the form of refraction and reflection, the light effect of the light source is fully utilized, meanwhile, the light spot shape is determined by the rectangle of the light emitting surface, and the internal illumination distribution is optimized by the compound eye of the light emitting surface; the SMS lens adopts a three-dimensional synchronous multi-surface design method, takes the light-emitting surface of the shaping lens as an extended light source, further optimizes the rectangular boundary and the internal illumination distribution of light spots, and adjusts the divergence angle of an emergent light beam; the zoom lens adopts a positive focal length design, and the distance between the zoom lens and the SMS lens is changed by moving the zoom lens, so that the emergent beam angle is changed; a camera synchronously controls a zoom lens zoom motor and a zoom driving motor of a zoom light supplement system through a control panel, so that the field angle of a zoom lens is matched with the light emitting angle of the zoom light supplement system.

The application provides a zoom light filling system, includes: a light source, a shaping lens, a synchronous multi-surface optical SMS lens, a zoom lens and a zoom driving motor; the zooming driving motor drives the zooming lens to move and zoom;

the light emitted by the light source enters the shaping lens;

the shaping lens comprises a rectangular light emitting surface, and the shaping lens shapes the light emitted by the light source and then emits the light to the SMS lens through the rectangular light emitting surface; the SMS lens adjusts the shape of the emergent wavefront and homogenizes the emergent light to obtain a corresponding emergent rectangular light spot and transmits the emergent rectangular light spot to the zoom lens.

In the application, the zooming and light supplementing system comprises a light source, a shaping lens, a synchronous multi-surface optical SMS lens, a zooming lens and a zooming driving motor; the zoom driving motor drives the zoom lens to move for zooming. The shaping lens comprises a rectangular light emitting surface, and the shaping lens is used for shaping the light emitted by the light source and then emitting the light to the SMS lens through the rectangular light emitting surface; the SMS lens adjusts the shape of the emergent wavefront and homogenizes the emergent light to obtain a corresponding emergent rectangular light spot which is transmitted to the zoom lens. According to the method and the device, the SMS lens is arranged behind the shaping lens, and the shape of the emergent wave front is adjusted by the SMS lens to change the internal illumination distribution, so that the illumination of the light spots can be kept basically uniform in the zooming process. The light emitting surface of the front section shaping lens is rectangular, the SMS lens is used as a new light emitting surface when being designed, and the designed light spot of the SMS lens is basically unchanged and can keep a rectangular light spot. The light spots are rectangular, are attached to the field angle, and have high lighting effect and less glare. The zoom light supplement imaging system is low in cost and good in light supplement effect.

While the preferred embodiments of the present application have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all alterations and modifications as fall within the scope of the application.

It will be apparent to those skilled in the art that various changes and modifications may be made in the present application without departing from the spirit and scope of the application. Thus, if such modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is intended to include such modifications and variations as well.

Claims (10)

1. A zoom fill light system, comprising: a light source, a shaping lens, a synchronous multi-surface optical SMS lens, a zoom lens and a zoom driving motor; the zooming driving motor drives the zooming lens to move and zoom;

the light emitted by the light source enters the shaping lens;

the shaping lens comprises a rectangular light emitting surface, and the shaping lens shapes the light emitted by the light source and then emits the light to the SMS lens through the rectangular light emitting surface; the SMS lens adjusts the shape of the emergent wavefront and homogenizes the emergent light to obtain a corresponding emergent rectangular light spot and transmits the emergent rectangular light spot to the zoom lens.

2. The system of claim 1, wherein the shaping lens comprises a rectangular light-exiting surface Total Internal Reflection (TIR) configuration lens; the TIR configuration lens is used for collecting and homogenizing the light emitted by the light source to emit light.

3. The system of claim 2, wherein said TIR configured lens further comprises a light entrance and a reflective surface, said reflective surface being a rectangular bounded inverted bowl slope.

4. The system of claim 2, wherein the light inlet comprises a top light inlet surface and a side wall light inlet surface, the top light inlet surface is a rectangular-bounded smooth free-form surface, and the side wall light inlet surface is a rectangular-mouth lofted bevel; the rectangular light emitting surface is a compound eye array surface.

5. The system of claim 1, wherein the SMS lens comprises a lenticular configuration lens.

6. The system as claimed in claim 5, wherein the SMS lens is configured to alternately construct a chain of ridges and points of a same step smooth surface and a synchronous smooth surface in a planar dimension by using boundary points of a light emitting surface of the shaping lens as an extended light source boundary, using boundary point emergent rays as edge rays, and using a catadioptric law and adjusting curvature of an emergent wavefront.

7. The system of claim 6, wherein the SMS lens constructs a rib point chain in three dimensions with points on the ridge point chain as starting points, and obtains the co-stepping smooth surface and the synchronous light emitting surface through point cloud interpolation.

8. The system of claim 1, wherein the zoom lens comprises a positive focal length lens.

9. The system of claim 8, wherein the positive focal length lens comprises a first optical surface and a second optical surface, wherein at least one of the optical surfaces is convex in shape.

10. A camera, comprising: a zoom lens, a control panel and the zoom fill light system of any one of claims 1 to 9;

and the control panel is used for controlling the zoom lens to zoom and synchronously controlling the zoom driving motor to move the zoom lens so as to enable the light-emitting angle of the zoom light supplement system to be matched with the field angle of the zoom lens.

Images