CN213983425U - Zoom lens with light guide piece and lamp - Google Patents
Zoom lens with light guide piece and lamp Download PDFInfo
- Publication number
- CN213983425U CN213983425U CN202120286422.5U CN202120286422U CN213983425U CN 213983425 U CN213983425 U CN 213983425U CN 202120286422 U CN202120286422 U CN 202120286422U CN 213983425 U CN213983425 U CN 213983425U
- Authority
- CN
- China
- Prior art keywords
- light guide
- light
- cavity
- area
- zoom lens
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Non-Portable Lighting Devices Or Systems Thereof (AREA)
Abstract
The utility model relates to the field of lighting technology, especially a take zoom lens and lamps and lanterns of leaded light spare. The zoom lens comprises a body, wherein the body comprises an incident area (101) and an emergent area (102); characterized in that the entrance area (101) comprises an entrance cavity (100), the entrance cavity (100) comprising a cavity bottom surface; the middle part of the bottom surface of the cavity is provided with a light guide part (1) and at least one annular prism (2) surrounding the light guide part (1); a light guide surface (11) is arranged on one side of the light guide piece (1) far away from the bottom surface of the cavity; and the light guide surface (11) exceeds the annular prism (2) in the direction away from the bottom surface of the cavity. When the light source is close to the light guide surface, the light guide piece can block light rays from irradiating the annular prism, the light rays are prevented from being converged through the reflecting surface, and most of the light rays can be enabled to only pass through the light guide piece. The change from the narrow angle to the wide angle of the emergent light is realized.
Description
Technical Field
The utility model relates to the field of lighting technology, especially a take zoom lens and lamps and lanterns of leaded light spare.
Background
The desk lamp is an electric lamp with a base and is placed on a desk, so that the desk lamp is small, exquisite and convenient to carry. The work desk lamp as one kind of desk lamp, is applied to the work scene, because its needs such as mixing of colors of adjusting luminance, present work desk lamp is mostly the LED desk lamp. In the field of maintenance, when a working table lamp is selected, a large and uniform light spot is required to meet daily application, and a small and bright light spot is required to be formed by focusing to meet the illumination of a tiny component.
Generally, the distance from the light source of the desk lamp to the desktop is about 40-50 cm, which requires that the change from a narrow angle (the light-emitting angle is about 25 degrees) to a wide angle (the light-emitting angle is about 95 degrees) be realized under the condition of a short zoom distance.
Chinese patent CN203893072U discloses a zoom lens, which has a narrow beam angle variation range, and when the beam angle varies from a narrow angle to a wide angle, the zoom distance is long, and the zoom requirement of the desk lamp cannot be satisfied.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a: aiming at the problems of narrow variation range of the light-emitting angle and long zooming distance of the existing zooming lens in the prior art, the zooming lens with the light guide piece is provided, the lens is provided with the annular total reflection prism in the rear cavity of the total reflection lens, the light guide piece is arranged in the middle of the rear cavity, and in the light guide piece, the height of the light guide surface is larger than that of the total reflection prism, so that the light-emitting angle of the LED light source can be changed from a narrow angle to a wide angle at a shorter zooming distance.
In order to realize the purpose, the utility model discloses a technical scheme be:
a zoom lens with a light guide member comprises a body, wherein the body comprises an incident area and an emergent area; the incidence region comprises an incidence cavity, and the incidence cavity comprises a cavity bottom surface;
the middle part of the bottom surface of the cavity is provided with a light guide part and at least one annular prism surrounding the light guide part;
a light guide surface is arranged on one side of the light guide piece, which is far away from the bottom surface of the cavity;
and the light guide surface exceeds the annular prism in the direction away from the bottom surface of the cavity.
And a reflecting surface is arranged between the incident area and the emergent area.
The lens is used in cooperation with a light source. The light source is positioned in the incident cavity or outside the light source incident cavity far away from the emergent area. The light emitted by the light source enters the entrance cavity in a large part. When the light source is far away from the lens, a part of light enters the lens through the incident cavity, is reflected by the reflecting surface and exits the lens from the emergent area; part of light rays are reflected and refracted by the annular prism and then are emitted out of the lens from the emergent area; part of the light rays are refracted by the light guide piece and then are emitted out of the lens from the emergent area; most of light rays are reflected, so that the light rays are converged towards the axial direction of the body, and smaller light spots are obtained. When the distance of light source and leaded light spare is near, when the distance of light source and leaded light face is near promptly, most light passes through leaded light spare and derives lens, and lens are jetted out from the exit region after light mainly passes through the refraction to obtain great facula. Because the leaded light face of leaded light spare surpasss annular prism, when the light source was close to the leaded light face, the leaded light spare can block light and shine to annular prism, has avoided light to assemble through the plane of reflection, can make most light only pass through the leaded light spare. When the light source is close to the light guide surface, the gradual change from the narrow angle to the wide angle of the emergent light is realized.
As the utility model discloses a preferred scheme, leaded light spare is cylindrical leaded light spare, prismatic leaded light spare, round platform shape leaded light spare, perhaps prismoid shape leaded light spare.
When the light guide is a cylindrical light guide or a prismatic light guide, one of the cylindrical bottom surfaces or one of the prismatic bottom surfaces is a light guide surface. When the light guide piece is a circular truncated cone-shaped light guide piece or a truncated pyramid-shaped light guide piece, the top surface of the circular truncated cone or the top surface of the truncated pyramid is a light guide surface.
As the preferred embodiment of the present invention, the light guide surface is a concave surface, and the concave direction is from the incident region to the emergent region.
When the light guide surface is a concave surface, the light guide surface can further play a role in diffusing light.
As the preferred scheme of the utility model, the side of leaded light spare with smooth transition between the cyclic annular prism.
As a preferable embodiment of the present invention, the annular prism includes a first incident surface and a first total reflection surface.
As the utility model discloses a preferred scheme centers on leaded light spare is equipped with a plurality of cyclic annular prisms, and keeps away from in proper order leaded light spare diffusion is arranged.
As a preferable embodiment of the present invention, the body is a rotating body.
As a preferred embodiment of the present invention, when the light guide surface is a plane, the axis of the rotating body is perpendicular to the light guide surface. When the light guide surface is a concave surface, the light guide surface is symmetrical with the axis center of the rotating body.
As a preferred embodiment of the present invention, the body is configured such that the outer side wall between the incident area and the exit area forms a second total reflection surface.
As the utility model discloses a preferred scheme, the regional middle part of outgoing is equipped with central refraction region, central refraction region can cover the terminal surface of leaded light spare.
As a preferred embodiment of the present invention, the exit area surrounds the central refraction area and is provided with an annular curved surface area; the section of the annular curved surface area is a concave curve.
As the preferred scheme of the utility model, cyclic annular curved surface is regional to be equipped with a plurality of rings of cyclic annular archs, cyclic annular arch uses the axis of body as the center.
As the preferred proposal of the utility model, the body is an integrated structure.
The utility model also provides a lamp, this lamp include as above take the zoom lens of leaded light spare.
The light source adopted by the lamp is an LED light source. Preferably, the light source is a white LED light source. Preferably, the light source is a COB-packaged light source of a white light LED. Preferably, the light source is connected with a control module, and the control module can adjust the brightness and the color temperature of the light source.
The LED light source with adjustable parameters is adopted, the lens can be better matched, light spots with uniform illumination can be obtained, and the LED light source is particularly suitable for short-distance dimming of table lamps and the like, and has certain requirements on illumination quality in use scenes.
To sum up, owing to adopted above-mentioned technical scheme, the beneficial effects of the utility model are that:
1. the utility model discloses a take zoom lens of leaded light spare through set up leaded light spare and cyclic annular prism in the incident cavity. The annular prism has a convergence effect on light, and is beneficial to forming smaller light spots. The light guide surface of the light guide piece is higher than the annular prism, and the light guide piece can block light rays from irradiating the annular prism; when the light source moves from far to near by a small distance, most of light rays are emitted into the lens from the light guide piece and are emitted after being refracted, and large light spots are obtained. A change from a narrow angle to a wide angle over a short distance is achieved.
2. The utility model discloses a take zoom lens of leaded light spare through setting up the leaded light face into the concave surface that is sunken from incident area to emergent area for light is behind leaded light spare, and for planar leaded light face, light can further spread, forms bigger facula.
3. The zoom lens with the light guide piece of the utility model has the advantages that the light guide piece and the annular prism are smoothly transited; and the central refraction area is arranged in the middle of the emergent area, the annular curved surface area is arranged on the outer ring, and the plurality of annular bulges are arranged, so that the illumination intensity in the light spot is more uniform in the change process from a narrow angle to a wide angle of the light ray.
4. The utility model discloses a lamps and lanterns, through using foretell zoom lens, the cooperation uses the LED light source, can be applicable to different application scenes, and especially work desk lamp etc. are high to light quality requirement, and change the scene that requires height to the light.
Drawings
Fig. 1 is a schematic structural view of a zoom lens with a light guide according to the present invention.
Fig. 2 is a schematic structural view of the zoom lens with a light guide according to the present invention.
Fig. 3 is a schematic top view of the zoom lens with a light guide according to the present invention.
Fig. 4 is a schematic cross-sectional view at a-a of fig. 3.
Fig. 5 is an enlarged schematic view of fig. 4 at circle B.
Fig. 6 is a left side view schematically illustrating the zoom lens with a light guide according to the present invention.
Fig. 7 is a right side view schematically illustrating the zoom lens with a light guide according to the present invention.
Fig. 8 is a schematic bottom view of the zoom lens with a light guide according to the present invention.
Fig. 9 is a schematic narrow-angle light path diagram of the zoom lens with a light guide according to the present invention.
Fig. 10 is a schematic view of a wide-angle optical path of the zoom lens with a light guide according to the present invention.
Icon: 100-an incident cavity; 101-an incident area; 102-an exit area; 1021-a central refractive region; 1022-an annular curved surface region; 103-a second total reflection surface; 200-a light source;
1-a light guide; 11-a light guide surface; 2-an annular prism; 21-a first entrance face; 22-first total reflection surface.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings.
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention.
Example 1
A zoom lens with a light guide 1, as shown in fig. 1-8, comprises a body including an entrance area 101 and an exit area 102; the incidence region 101 comprises an incidence cavity 100, and the incidence cavity 100 comprises a cavity bottom surface; the middle part of the bottom surface of the cavity is provided with a light guide part 1 and at least one annular prism 2 surrounding the light guide part 1; a light guide surface 11 is arranged on one side of the light guide part 1, which is far away from the bottom surface of the cavity; in the direction away from the bottom surface of the cavity, the light guide surface 11 exceeds the annular prism 2. A reflection surface is arranged between the incident region 101 and the emergent region 102. The light guide surface 11 exceeds the annular prism 2, that is, the distance from the light guide surface to the bottom surface of the cavity is greater than the distance from one side of the annular prism, which is far away from the bottom surface of the cavity, to the bottom surface of the cavity.
In a further scheme, the body is a rotating body. The body is a total reflection lens. That is, on the basis of the total reflection lens, the light guide member 1 and the annular prism 2 are disposed in the incident cavity 100 of the total reflection lens. The outer side wall of the body between the incident region 101 and the exit region 102 forms a second total reflection surface 103. The body, the light guide member 1 and the annular prism 2 are of an integrally formed structure. Is integrally formed and processed by adopting the processes of injection molding and the like.
In a further aspect, the annular prism 2 includes a first incident surface 21 and a first total reflection surface 22. A plurality of annular prisms 2 are arranged around the light guide member 1 and are sequentially away from the light guide member 1 for diffusion arrangement. In the present embodiment, the annular prisms 2 include two annular prisms 2.
In a further aspect, the light guide 1 is a cylindrical light guide, a prismatic light guide, or a truncated cone light guide, or a truncated pyramid light guide. When the light guide 1 is a cylindrical light guide or a prismatic light guide, one of the cylindrical bottom surfaces or one of the prismatic bottom surfaces is a light guide surface 11. When the light guide member 1 is a truncated cone-shaped light guide member or a truncated pyramid-shaped light guide member, the top surface of the truncated cone or the top surface of the truncated pyramid is a light guide surface 11.
In a further embodiment, the light guide surface 11 is concave, and the concave direction is from the incident region 101 to the emission region 102.
When the light guide surface 11 is a concave surface, the light guide surface can further diffuse light. When light guide surface 11 is concave, the side of light guide surface 11 closer to light source 200 extends beyond annular prism 2. I.e. the bottom of the concave surface may be lower than the top of the annular prism 2, but the edge of the concave surface is higher than the top of the annular prism 2. When the light guide surface 11 is a plane, the axis of the rotating body is perpendicular to the light guide surface 11. When the light guide surface 11 is a concave surface, the light guide surface 11 is centrosymmetric with the axis of the rotating body.
In a further aspect, the side surface of the light guide 1 and the annular prism 2 are in smooth transition.
In a further embodiment, a central refraction area 1021 is disposed in the middle of the exit area 102, and the central refraction area 1021 can cover the end surface of the light guide 1. The exit area 102 surrounds the central refraction area 1021, and is provided with an annular curved surface area 1022; the cross section of the annular curved surface region 1022 is a concave curve. The annular curved surface region 1022 is provided with a plurality of circles of annular protrusions, and the annular protrusions take the axis of the body as the center.
The lens is used in conjunction with the light source 200. The distance from the light source to the light guide surface is smaller than the distance from the light source to the annular prism along the axis direction of the rotating body. As shown in fig. 9-10, the light source 200 is located inside the entrance cavity 100 or outside the entrance cavity 100 of the light source 200 away from the exit area 102. The light emitted from the light source 200 enters the incident cavity 100 in a large part. When the light source 200 is far from the lens, as shown in fig. 9, a part of light enters the lens through the incident cavity 100, is reflected by the second total reflection surface 103, and exits the lens from the exit region 102; part of the light rays are reflected and refracted by the annular prism 2 and then are emitted out of the lens from the emergent area 102; a part of light rays are refracted by the light guide member 1 and then emitted out of the lens from the emergent region 102; most of the light is reflected (most of the light is reflected by the first total reflection surface 22 or the second total reflection surface 103), so that the light is converged towards the axial direction of the body, and a small light spot is obtained.
When the distance between the light source 200 and the light guide 1 is short, as shown in fig. 10, that is, the distance between the light source 200 and the light guide surface 11 is short, most of the light rays are guided out of the lens through the light guide 1, and the light rays are mainly refracted and then exit the lens from the exit area 102, so that a large light spot is obtained. Because the leaded light face 11 of leaded light spare 1 surpasss annular prism 2, when light source 200 was close to leaded light face 11, leaded light spare 1 can block light and shine to annular prism 2, has avoided light to assemble through the plane of reflection, can make most light only pass through leaded light spare 1. When the light source 200 is gradually close to the light guide surface 11, the change from the narrow angle to the wide angle of the emergent light is realized.
Example 2
A luminaire comprising a variable focus lens with a light guide as described in any of embodiment 1.
The light source 200 adopted by the lamp is an LED light source. Preferably, the light source 200 is a white LED light source. Preferably, the light source 200 is a COB-packaged light source of a white LED. Preferably, the light source 200 is connected with a control module, and the control module can adjust the brightness and color temperature of the light source.
The LED light source with adjustable parameters is adopted, the lens can be better matched, light spots with uniform illumination can be obtained, and the LED light source is particularly suitable for short-distance dimming of table lamps and the like, and has certain requirements on illumination quality in use scenes.
The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.
Claims (10)
1. A zoom lens with light guide, comprising a body comprising an entrance area (101) and an exit area (102); characterized in that the entrance area (101) comprises an entrance cavity (100), the entrance cavity (100) comprising a cavity bottom surface;
the middle part of the bottom surface of the cavity is provided with a light guide part (1) and at least one annular prism (2) surrounding the light guide part (1);
a light guide surface (11) is arranged on one side of the light guide piece (1) far away from the bottom surface of the cavity;
and the light guide surface (11) exceeds the annular prism (2) in the direction away from the bottom surface of the cavity.
2. Zoom lens with light guide according to claim 1, characterized in that the light guide (1) is a cylindrical light guide, a prismatic light guide, a truncated circular light guide or a truncated circular light guide.
3. The variable focus lens with light guide according to claim 1, wherein the light guide surface (11) is concave and the concave direction is from the incident region (101) to the exit region (102).
4. Zoom lens with light guide according to claim 1, characterized in that there is a smooth transition between the side of the light guide (1) and the annular prism (2).
5. The zoom lens with light guide according to claim 1, wherein the annular prism (2) includes a first incident surface (21) and a first total reflection surface (22).
6. Zoom lens with light guide according to claim 1, characterized in that a plurality of annular prisms (2) are arranged around the light guide (1) and are arranged diffused away from the light guide in turn.
7. The variable focus lens with light guide according to claim 1, wherein the body, an outer side wall between the incident area (101) and the exit area (102) forms a second total reflection surface (103).
8. Zoom lens with light guide according to claim 1, characterized in that the exit area (102) is provided with a central refractive area (1021) in the middle, the central refractive area (1021) being capable of covering the end face of the light guide (1).
9. The variable focus lens with light guide of claim 8, wherein the exit area (102) surrounds the central refractive area (1021) with an annular curved area (1022); the section of the annular curved surface area (1022) is a concave curve.
10. A luminaire comprising a variable focus lens with light guide as claimed in any one of claims 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120286422.5U CN213983425U (en) | 2021-02-01 | 2021-02-01 | Zoom lens with light guide piece and lamp |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120286422.5U CN213983425U (en) | 2021-02-01 | 2021-02-01 | Zoom lens with light guide piece and lamp |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213983425U true CN213983425U (en) | 2021-08-17 |
Family
ID=77252445
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120286422.5U Active CN213983425U (en) | 2021-02-01 | 2021-02-01 | Zoom lens with light guide piece and lamp |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213983425U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114399898A (en) * | 2022-01-12 | 2022-04-26 | 维沃移动通信有限公司 | Electronic device |
-
2021
- 2021-02-01 CN CN202120286422.5U patent/CN213983425U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114399898A (en) * | 2022-01-12 | 2022-04-26 | 维沃移动通信有限公司 | Electronic device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP5301899B2 (en) | Light source device and lighting apparatus using the same | |
| US20050168995A1 (en) | Fresnel lens spotlight with coupled variation of the spacing of lighting elements | |
| JP2002093227A (en) | Linear lighting system | |
| EP3957904A1 (en) | An anti-glare reflector cup and a lamp with the anti-glare reflector cup | |
| CN202532387U (en) | Mixed light pillar with condensing function and light-emitting diode (LED) spotlight thereof | |
| CN109661541A (en) | Indirect-type lighting apparatus | |
| JP4482728B2 (en) | Light diffusing element | |
| CN213983425U (en) | Zoom lens with light guide piece and lamp | |
| US20050162750A1 (en) | Fresnel lens spotlight | |
| CN111207366A (en) | Light splitting lens, full-circumference light-emitting lamp and working method thereof | |
| JP2013020716A (en) | Luminous flux control member, and light-emitting device | |
| WO2015047078A1 (en) | Indirect illumination system | |
| CN109539163B (en) | Optical lens and have optical lens's optical module, vehicle headlamps | |
| CN111322584A (en) | Lens and lighting device | |
| CN214249270U (en) | Lamp fitting | |
| CN214038023U (en) | Optical module and lamp | |
| CN215174352U (en) | Even desk lamp of illuminance | |
| CN112682728B (en) | Optical module and lamp | |
| CN212841333U (en) | LED car lamp module | |
| CN111981429B (en) | LED car lamp module | |
| CN212226945U (en) | Light splitting lens and full-circumference light-emitting lamp | |
| CN211694737U (en) | Blackboard lamp polarizing lens and blackboard lamp | |
| CN208566571U (en) | A kind of focusing lamp lens group and corresponding lighting system | |
| KR101191406B1 (en) | Led lamp device with distribution pattern of luminous intensity of incandescent lamp | |
| CN211526348U (en) | Lens and lighting device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |