CN217209013U - Optical system and lamp - Google Patents
Optical system and lamp Download PDFInfo
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- CN217209013U CN217209013U CN202220740401.0U CN202220740401U CN217209013U CN 217209013 U CN217209013 U CN 217209013U CN 202220740401 U CN202220740401 U CN 202220740401U CN 217209013 U CN217209013 U CN 217209013U
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Abstract
The utility model provides an optical system and a lamp, wherein the optical system comprises a light source; the lens assembly comprises a first lens and a second lens connected with the first lens, wherein a receiving hole, a first incident surface, a first reflecting surface and a first light emitting surface are formed on the inner wall surface of the receiving hole; the second lens part protrudes into the receiving hole and comprises a second incident surface, a second reflecting surface and a second light-emitting surface which are accommodated in the receiving hole; and the secondary reflector is connected with the first lens, a third reflecting surface is formed on the secondary reflector, the third reflecting surface and the second light emitting surface are arranged oppositely, so that part of light emitted by the light source enters the first lens from the first incident surface and is reflected to the first light emitting surface through the first reflecting surface to be emitted, the other part of light enters the second lens from the second incident surface and is reflected to the second light emitting surface through the second reflecting surface to be emitted to the third reflecting surface of the secondary reflector to be emitted.
Description
Technical Field
The utility model relates to an optical system and lamps and lanterns belongs to the lighting technology field.
Background
The secondary reflector in the existing optical system basically cannot play a role of optical light control and only can play a role of increasing the shading angle. The light refracted by the lens from the light source, especially the light in the middle part, has a relatively small light-emitting area, so that the brightness is particularly high, the glare is particularly serious, and the self-viewing lens cannot be realized.
Accordingly, an optical system and a lamp are needed to solve the above problems.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide an optical system to make whole optical system light-emitting soft.
To achieve the above object, the present invention provides an optical system including: a light source; a lens assembly including a first lens and a second lens coupled to the first lens, the first lens including a receiving hole provided at a center thereof and receiving light emitted from the light source, a first incident surface, a first reflection surface, and a first light emitting surface formed on an inner wall surface of the receiving hole; the second lens part protrudes into the receiving hole, and the second lens comprises a second incidence surface, a second reflection surface and a second light-emitting surface, wherein the second incidence surface is accommodated in the receiving hole and is connected with the first incidence surface, and the second reflection surface and the second light-emitting surface are arranged opposite to the second incidence surface; and the secondary reflector is connected with the first lens on one side of the first light emitting surface of the first lens, a third reflecting surface is formed on the secondary reflector, the third reflecting surface and the second light emitting surface are oppositely arranged, so that part of light emitted by the light source enters the first lens from the first incident surface and is reflected to the first light emitting surface through the first reflecting surface for emitting, and the other part of light enters the second lens from the second incident surface and is reflected to the second light emitting surface through the second reflecting surface for emitting to the third reflecting surface of the secondary reflector.
As a further improvement of the present invention, the receiving hole is vertically penetrated by the first lens, the first light emitting surface surrounds the periphery of the receiving hole, and the second lens is inserted into the receiving hole from one side of the first light emitting surface, so that the second incident surface is located in the receiving hole.
As a further improvement of the present invention, the first light emitting surface is formed with the mounting surface between the first incident surface, a fitting surface is formed between the second incident surface of the second lens and the second light emitting surface, the second lens is inserted into the receiving hole, and the fitting surface is in contact with the mounting surface.
As a further improvement of the present invention, the first lens is a bowl-shaped structure with a wide upper part and a narrow lower part, the first light emitting surface is located the top of the first lens and gradually shrinks towards the receiving hole from the outer edge of the first lens, the first incident surface is located the bottom of the first lens, the first reflecting surface surrounds the first incident surface, and the light source is located the lower center of the receiving hole.
As a further improvement of the present invention, the second lens is a cylindrical lens, the second incident surface is formed on the conical surface of the bottom of the second lens, the second reflective surface is a conical surface formed by the downward depression of the top of the second lens, and the second light emitting surface is surrounded by the second reflective surface.
As a further improvement of the present invention, the first lens further has a fixing portion, a fixing surface is formed on the fixing portion, and the second-level reflector is fixed on the fixing portion and in contact with the fixing surface.
As a further improvement of the present invention, the second-stage reflector is a horn-shaped structure that gradually shrinks from the top toward the bottom, the bottom of the second-stage reflector is in contact with and fixed by the fixing surface, and the third reflecting surface is the inner wall surface of the second-stage reflector.
As a further improvement of the utility model, first plane of reflection, second plane of reflection and third plane of reflection are the total reflection face.
As a further improvement of the present invention, the first lens is fixed to the second lens by welding, and the second-order reflector is fixed to the first lens by bonding.
It is still another object of the present invention to provide a lamp for better utilizing the above-mentioned optical system.
In order to achieve the above object, the present invention provides a lamp including the above optical system.
The utility model has the advantages that: the utility model discloses a to the design of composite lens, utilize different lens to control different light paths, the light path energy of side is controlled to first lens, the light path energy of middle part is controlled to the second lens, the angle that can effectual control light outgoing; the light rays in the middle are changed through the second lens and are made to strike the secondary reflector, the size of the secondary light spot is controlled through the curvature change of the secondary reflector, the maximum brightness of the surface of the lamp can be obviously reduced, the target of high luminous flux and low brightness is achieved, and the effect of direct vision of human eyes can be achieved.
Drawings
Fig. 1 is a schematic structural diagram of an optical system according to a preferred embodiment of the present invention.
Fig. 2 is an exploded view of fig. 1.
Fig. 3 is a schematic structural view of the first lens in fig. 1.
Fig. 4 is a schematic structural view of the second lens in fig. 1.
Fig. 5 is a schematic diagram of the structure of the secondary reflector of fig. 1.
Fig. 6 is a cross-sectional view of fig. 1.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention will be described in detail with reference to the accompanying drawings and specific embodiments.
In order to avoid obscuring the present invention with unnecessary details, it should be noted that only the structures and/or processing steps closely related to the aspects of the present invention are shown in the drawings, and other details not relevant to the present invention are omitted.
In addition, it should be further noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
As shown in fig. 1 and fig. 2, the present invention discloses an optical system 100, where the optical system 100 can be applied to various lamps (such as a down lamp, a ceiling lamp, etc.) to reduce the maximum brightness of the surface of the lamp, so as to achieve the goal of high luminous flux and low brightness of the lamp, and achieve the effect of direct vision of human eyes.
The optical system 100 includes a light source 40, a lens assembly, and a secondary reflector 30. The lens assembly comprises a first lens 10 and a second lens 20 connected to said first lens 10. The first lens 10 includes a receiving hole 14 disposed at a central position thereof and receiving the light emitted from the light source 40, a first incident surface 11 formed on an inner wall surface of the receiving hole 14, a first reflecting surface 12, and a first light emitting surface 13; the second lens 20 partially protrudes into the receiving hole 14, and includes a second incident surface 21 received in the receiving hole 14 and connected to the first incident surface 11, a second reflecting surface 22 disposed opposite to the second incident surface 21, and a second light emitting surface 23. The secondary reflector 30 is connected to the first lens 10 on the first light emitting surface 13 side of the first lens 10, and a third reflecting surface 31 is formed on the secondary reflector 30. The third reflecting surface 31 is disposed opposite to the second light emitting surface 23. The first reflecting surface 12, the second reflecting surface 22, and the third reflecting surface 31 are all total reflecting surfaces.
With such arrangement, a part of the light emitted from the light source 40 can enter the first lens 10 from the first incident surface 11 and be reflected to the first light emitting surface 13 by the first reflecting surface 12 for emission, and another part of the light can enter the second lens 20 from the second incident surface 21 and be reflected to the second light emitting surface 23 by the second reflecting surface 22, and then be emitted to the third reflecting surface 31 on the secondary reflector 30 for emission.
Referring to fig. 2 and 3, the receiving hole 14 extends vertically through the first lens 10, that is, the first lens 10 is hollow. The first light emitting surface 13 surrounds the periphery of the receiving hole 14, and the second lens 20 is inserted into the receiving hole 14 from the first light emitting surface 13 side such that the second incident surface 21 is positioned within the receiving hole 14. Specifically, a mounting surface 15 is formed between the first light emitting surface 13 and the first incident surface 11, a mating surface 24 is formed between the second incident surface 21 and the second light emitting surface 23 of the second lens 20, and after the second lens 20 is inserted into the receiving hole 14, the mating surface 24 and the mounting surface 15 contact each other. At this time, the second lens 20 inserted into the receiving hole 14 and the first lens 10 are coaxially arranged, i.e., the lens assemblies (the first lens 10 and the second lens 20) are symmetrical about the axis L. With this arrangement, the second lens 20 is inserted into and closes the receiving hole 14, and a part of the light emitted from the light source 40 (the light near the axis L and at the center of the receiving hole 14) can enter the second lens 20 from the second incident surface 21.
Further, the mounting surface 15 and the mating surface 24 are identical in structure and gradually contract from the top to the bottom to form a cylindrical curved surface with a wide top and a narrow bottom. With this arrangement, when the second lens 20 is inserted into the receiving hole 14, the pressing force of the first lens 10 and the second lens 20 can be effectively reduced, and the first lens 10 and the second lens 20 can be prevented from being damaged due to the pressing.
Preferably, the first lens 10 is a bowl-shaped structure with a wide top and a narrow bottom, and the first light emitting surface 13 is located at the top of the first lens 10 and gradually shrinks from the outer edge of the first lens 10 toward the receiving hole 14; the first incident surface 11 is positioned at the bottom of the first lens 10, the first reflecting surface 12 is disposed around the first incident surface 11, and the light source 40 is positioned at a lower center position of the receiving hole 14. That is, the first incident surface 11 of the first lens 10 is an inner wall surface of the bottom of the receiving hole 14 and is connected to the second incident surface 21 located above, so that the entire lens assembly can be combined to form a substantially rectangular incident cavity, and the light source 40 is located at the lower center position of the incident cavity, which is located on the axis L.
By the arrangement, the light emitted by the light source 40 can be symmetrical about the axis L, and the light emitted by the light source 40 can be respectively incident on the first incident surface 11 and the second incident surface 21 through the incident cavity to the greatest extent. When the light is refracted by the first incident surface 11 and enters the first lens 10, the light is relatively diffused in the first lens 10, and then is reflected by the first reflecting surface 12 and then exits from the first light exiting surface 13, and the light exiting from the first light exiting surface 13 is relatively close to the axis L, so that the generation of light spots is reduced, and the central light exiting of the lamp is relatively soft.
Referring to fig. 2 and 4, the second lens 20 is disposed in a cylindrical shape, the second incident surface 21 is a tapered surface formed at the bottom of the second lens 20, the second reflecting surface 22 is a tapered surface formed by recessing the top of the second lens 20 downward, and the second light emitting surface 23 is disposed around the second reflecting surface 22. When the light emitted from the light source 40 is refracted by the second incident surface 21 and enters the second lens 20, the light entering the second lens 20 is substantially parallel to and around the axis L, the light is reflected by the second reflecting surface 22 and then exits from the second light emitting surface 23, and is refracted away from the axis L, and finally, the light refracted by the second light emitting surface 23 hits the secondary reflector 30 and is reflected by the third reflecting surface 31 on the secondary reflector 30. With the arrangement, the light rays emitted by the light source 40 and close to the axis L can be changed, so that the maximum brightness of the lamp is reduced, the shading angle of the secondary reflector 30 is increased, and the size of the secondary light spot can be controlled by changing the curvature of the secondary reflector 30. Meanwhile, the area of the third reflecting surface 31 on the secondary reflector 30 is large, so that the high luminous flux and low brightness of the lamp can be achieved, and the effect of direct vision of human eyes is achieved.
With reference to fig. 3, 5 and 6, the first lens 10 further includes a fixing portion having a fixing surface 16 formed thereon, and the secondary reflector 30 is fixed to the fixing portion and contacts the fixing surface 16. Specifically, the secondary reflector 30 is a horn-shaped structure gradually converging from the top toward the bottom, and the bottom of the secondary reflector 30 is in contact with and fixed to the fixing surface 16. In the present invention, the first lens 10 and the second lens 20 are fixed by the fitting surface 24 and the abutting against the mounting surface 15, and the second-order reflector 30 and the first lens 10 are fixed by welding, but in other embodiments, the fixing method between the first lens 10 and the second lens 20 and the fixing method between the first lens 10 and the second-order reflector 30 may be adjusted, for example: the first lens 10 and the second lens 20 may be fixed by welding, snapping, or adhering, and the secondary reflector 30 and the first lens 10 may be fixed by snapping or adhering, which is not limited herein.
The third reflecting surface 31 is an inner wall surface of the secondary reflector 30. In addition, the second reflecting surface 22 and the second light emitting surface 23 on the second lens 20 are both higher than the first light emitting surface 13, and the lowest end (the vertex of the conical surface) of the second reflecting surface 22 is higher than the fixing surface 16 or flush with the fixing surface 16, so that it can be ensured that the light entering the second lens 20 is emitted from the second light emitting surface 23 and then all of the light is incident on the third reflecting surface 31, so as to ensure high luminous flux of the lamp.
In order to realize the above optical system 100, a design method of the above optical system 100 will be described in detail below. The method for designing the optical system 100 mainly includes:
step 1, defining a coordinate point of a light source 40 as (0,0) in a plane rectangular coordinate system, and representing incident light rays emitted by the light source 40 according to linear representatives; defining the incident angle of the incident light as theta according to the curve equationCalculating to obtain the incident vector of the incident light ray as
Step 2, determining a normal vector on the second incident surface 21: the direction vector of the emergent ray refracted from the second incident surface 21 is selected to be
Using Euler's formula and according to the law of refraction
Where n is the refractive index, the normal vector of the second incident surface 21 on the current incident light ray is calculated
And according to the normal vector
Calculating to obtain a corresponding coordinate point;
step 3, changing the direction vector of the emergent ray refracted from the second incident surface 21 under the current incident ray, and circularly entering the step 2 until a plurality of coordinate points are formed on the second incident surface 21;
step 4, calculating the curvature of the second incident surface 21 according to the plurality of coordinate points obtained in the step 3, and cutting the second lens 20 according to the curvature of the second incident surface 21 to obtain a continuously-changed free-form surface, namely the second incident surface 21;
and 5, respectively calculating curvatures of the second reflecting surface 22 and the third reflecting surface 31 according to the steps 2-4, and respectively cutting the second lens 20 and the secondary reflector 30 according to the curvatures of the second reflecting surface 22 and the third reflecting surface 31 to obtain two continuously-changed free curved surfaces, namely the second reflecting surface 22 and the third reflecting surface 31.
In the above design method, step 3 means: keeping the incident light in step 2 unchanged, i.e.
Fixed by varying the direction vector of the emergent ray
To calculate the next normal vector
Corresponding coordinate points can be obtained.
As shown in fig. 6, the design method mainly calculates the curvatures of the second incident surface 21, the second reflective surface 22 and the third reflective surface 31, and then cuts the lens assembly according to the respective curvatures to obtain the second incident surface 21, the second reflective surface 22 and the third reflective surface 31. Specifically, in step 1, in order to calculate the curvatures of the second incident surface 21, the second reflecting surface 22 and the third reflecting surface 31, the whole optical system 100 is placed in a rectangular plane coordinate system, the coordinate point of the light source 40 is defined as (0,0), and the incident angle of the incident light emitted from the light source 40 is defined as θ, so that the emergent light (i.e., the incident light) of the light source 40 can utilize linear algebra: y is expressed as tan (theta) x, and the vector of the incident light is further obtained according to a curve equation
sin (θ)). In addition, in order to be able to conveniently calculate the coordinate points in step 2 and step 3, the utility model discloses a utilize excel table calculation to obtain. Of course, the coordinate point may be calculated by other data processing tools, and is not limited herein.
To sum up, the utility model utilizes different lenses to control different light paths through the design of the combined lens, the first lens 10 controls the light path energy of the side edge, the second lens 20 controls the light path energy of the middle part, and the angle of the emergent ray can be effectively controlled; namely, the light rays in the middle are changed through the second lens 20 and are made to strike the secondary reflector 30, the size of the secondary light spot is controlled through the curvature change of the secondary reflector 30, the maximum brightness of the surface of the lamp can be obviously reduced, the targets of high luminous flux and low brightness of the lamp are achieved, and the effect of direct vision of human eyes can be achieved.
In the design method of the optical system 100, the coordinates of the initial point, that is, the coordinates of the light source 40, are specified, various calculation formulas are combined by using euler's formula, and the coordinate points of the respective free curved surfaces (the second incident surface 21, the second reflecting surface 22, and the third reflecting surface 31) are obtained by using an excel tool, and then are guided into cad, and the respective free curved surfaces are obtained by connecting the respective coordinate points by using a free curve command, and different angles can be obtained by setting direction vectors of different target outgoing rays.
The above embodiments are only for illustrating the technical solutions of the present invention and not for limiting, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the technical solutions of the present invention can be modified or replaced equivalently without departing from the spirit and scope of the technical solutions of the present invention.
Claims (10)
1. An optical system, comprising:
a light source (40);
a lens assembly including a first lens (10) and a second lens (20) connected to the first lens (10), the first lens (10) including a receiving hole (14) provided at a central position thereof and receiving light emitted from a light source (40), a first incident surface (11) formed on an inner wall surface of the receiving hole (14), a first reflecting surface (12), and a first light emitting surface (13); the second lens (20) partially protrudes into the receiving hole (14), and the second lens (20) comprises a second incidence surface (21) which is accommodated in the receiving hole (14) and connected with the first incidence surface (11), a second reflection surface (22) which is arranged opposite to the second incidence surface (21), and a second light-emitting surface (23); and
the secondary reflector (30) is connected with the first lens (10) on one side of a first light emitting surface (13) of the first lens (10), a third reflecting surface (31) is formed on the secondary reflector (30), the third reflecting surface (31) and the second light emitting surface (23) are arranged oppositely, so that a part of light emitted by the light source (40) enters the first lens (10) from the first incident surface (11) and is reflected to the first light emitting surface (13) through the first reflecting surface (12) for emission, and the other part of light enters the second lens (20) from the second incident surface (21) and is reflected to the second light emitting surface (23) through the second reflecting surface (22) for emission to the third reflecting surface (31) of the secondary reflector (30).
2. The optical system of claim 1, wherein: the receiving hole (14) penetrates through the first lens (10) vertically, the first light emitting surface (13) surrounds the periphery of the receiving hole (14), and the second lens (20) is inserted into the receiving hole (14) from one side of the first light emitting surface (13) so that the second incidence surface (21) is located in the receiving hole (14).
3. The optical system of claim 2, wherein: an installation surface (15) is formed between the first light emitting surface (13) and the first incident surface (11), a matching surface (24) is formed between the second incident surface (21) and the second light emitting surface (23) of the second lens (20), and after the second lens (20) is inserted into the receiving hole (14), the matching surface (24) is in contact with the installation surface (15).
4. The optical system of claim 2, wherein: the first lens (10) is a bowl-shaped structure with a wide upper part and a narrow lower part, the first light emitting surface (13) is located at the top of the first lens (10) and gradually shrinks from the outer edge of the first lens (10) towards the receiving hole (14), the first incident surface (11) is located at the bottom of the first lens (10), the first reflecting surface (12) is arranged around the first incident surface (11), and the light source (40) is located at the lower center of the receiving hole (14).
5. The optical system of claim 2, wherein: the second lens (20) is arranged in a cylindrical shape, the second incident surface (21) is a conical surface formed at the bottom of the second lens (20), the second reflecting surface (22) is a conical surface formed by downwards sinking the top of the second lens (20), and the second light emitting surface (23) is arranged around the second reflecting surface (22).
6. The optical system of claim 1, wherein: the first lens (10) is further provided with a fixing part, a fixing surface (16) is formed on the fixing part, and the secondary reflector (30) is fixed on the fixing part and is in contact with the fixing surface (16).
7. The optical system of claim 6, wherein: the secondary reflector (30) is of a horn-shaped structure gradually shrinking from the top to the bottom, the bottom of the secondary reflector (30) is in contact with and fixed to the fixing surface (16), and the third reflecting surface (31) is the inner wall surface of the secondary reflector (30).
8. The optical system of claim 1, wherein: the first reflecting surface (12), the second reflecting surface (22) and the third reflecting surface (31) are all total reflecting surfaces.
9. The optical system of claim 1, wherein: the first lens (10) and the second lens (20) are fixed in a welding mode, and the secondary reflector (30) and the first lens (10) are fixed in a pasting mode.
10. A luminaire comprising an optical system according to any one of claims 1-9.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2021228304268 | 2021-11-18 | ||
| CN202122830426 | 2021-11-18 |
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| Publication Number | Publication Date |
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| CN217209013U true CN217209013U (en) | 2022-08-16 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202220740401.0U Active CN217209013U (en) | 2021-11-18 | 2022-04-01 | Optical system and lamp |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114623398A (en) * | 2021-11-18 | 2022-06-14 | 欧普照明股份有限公司 | Optical system, optical system design method and lamp |
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2022
- 2022-04-01 CN CN202220740401.0U patent/CN217209013U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114623398A (en) * | 2021-11-18 | 2022-06-14 | 欧普照明股份有限公司 | Optical system, optical system design method and lamp |
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