CN207500839U - A kind of optical system for LED stage lamp tool - Google Patents
A kind of optical system for LED stage lamp tool Download PDFInfo
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- CN207500839U CN207500839U CN201721571944.XU CN201721571944U CN207500839U CN 207500839 U CN207500839 U CN 207500839U CN 201721571944 U CN201721571944 U CN 201721571944U CN 207500839 U CN207500839 U CN 207500839U
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- 230000003287 optical effect Effects 0.000 title claims abstract description 34
- 238000003384 imaging method Methods 0.000 claims abstract description 99
- 239000011324 bead Substances 0.000 claims abstract description 37
- 239000000758 substrate Substances 0.000 claims abstract description 14
- 238000000605 extraction Methods 0.000 claims description 6
- 238000009738 saturating Methods 0.000 claims description 5
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- 238000010586 diagram Methods 0.000 description 3
- 230000004907 flux Effects 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 230000017525 heat dissipation Effects 0.000 description 2
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Abstract
The utility model provides a kind of optical system for LED stage lamp tool, it includes the LED light source component set gradually, collector lens component, imaging lens arrangement；LED light source component includes substrate and LED lamp bead, and LED lamp bead, in regular hexagon array distribution, makes the light that light source is sent out evenly in base plan, reduces light losing, promotes collection efficiency；Collector lens component can improve the uniformity of single beam beam, while promote the hot spot uniformity by beam condenser that LED light source component is launched into collimation uniform beam；After uniform beam after the polymerization passes through closing light lens, multi-beam collimation light beam is focused on the focal point of closing light lens, light is projected after being imaged microscope group, obtains specular removal, the high clear pattern of optical quality.
Description
Technical field
The utility model is related to a kind of optical systems for stage lamp, refer in particular to a kind of for LED stage lamp tool
Optical system.
Background technology
The light source that stage pattern lamps and lanterns are applied at present gradually substitutes golden halogen discharging bulb light source with LED light source, to improve
The uniformity of LED light source light efficiency and projected spot, company and engineers and technicians use plurality of LEDs and collector lens in succession in the industry
The skill of permutation and combination, the even light of additional fly's-eye lens and closing light lens a series of components composition high power light source modules such as optically focused again
Art, although using the hot spot uniformity >=90% after the LED light source module projection of this technology, light output efficiency is only 70-
Between 80%, not ideal enough (LED module light efficiency=exported after light source module group the naked smooth nominal light fluxes of luminous flux/LED),
And lens arrangement complexity causes making processing cost excessively high.In addition thang-kng reduces the LED moulds that lens numbers carry out optically focused closing light
Though group is at low cost, its hot spot uniformity≤50%, the hot spot uniformity is poor, and light efficiency is not ideal enough between 75-85%.For
Great power LED module technology and matched imaging of this current stage lamp there is an urgent need for a kind of specular removal, compared with high evenness
Optical system.
Utility model content
Technical problem to be solved in the utility model is：The hot spot uniformity and light efficiency of LED stage lamp tool pattern imaging
The problem of being difficult to take into account simultaneously.
In order to solve the above-mentioned technical problem, the technical solution adopted in the utility model is：It provides a kind of for LED stage lamp
The optical system of tool, it is characterised in that：It include the LED light source component set gradually from light direction, collector lens component, into
As lens subassembly；
The LED light source component includes substrate and LED lamp bead, and the LED lamp bead is distributed on substrate in regular hexagon；
The collector lens component includes the first collector lens group set gradually close to LED light source component, the second optically focused
Lens group and closing light lens；The first collector lens group includes the first lens, and the incidence surfaces of the first lens is concave spherical surface, light extraction
Face is convex spherical；The second collector lens group includes the second lens, and incidence surface and the light-emitting surface of the second lens are secondary song
Face；The incidence surface of the closing light lens and light-emitting surface are convex spherical；
The imaging lens arrangement include the first imaging len set gradually along LED light source component light extraction optical path direction,
Second imaging len, third imaging len, the 4th imaging len and the 5th imaging len；First imaging len is just curved
Month lens；Second imaging len is diverging meniscus lens；The third imaging len is biconvex spherical lens；Described the four one-tenth
As lens are double-concave negative lens；5th imaging len is biconvex positive lens.
Preferably, the quantity of the LED lamp bead is no less than 18, and lamp bead is not placed in the substrate center position.
Preferably, the radius of curvature of first lens incidence surface is 4.5~10.0mm, and the radius of curvature of light-emitting surface is 2
The distance of~6mm, first lens and the LED lamp bead is 0.05~0.30mm.
Preferably, the radius of curvature of second lens incidence surface is 10~18mm, and surface coefficients are 0.1~0.5, light extraction
The radius of curvature in face is 4.5~9.0mm, and surface coefficients are 0~-1, and the spacing distance of the second lens and first lens is
0.5~1.0mm.
Preferably, the radius of curvature of the closing light lens incidence surface is 38~55mm, the radius of curvature of light-emitting surface for 140~
300mm, focal length are 45~75mm, and the spacing distance with the second collector lens group is 5.5~12.0mm.
Preferably, the focal plane of the closing light lens is provided with light hole, a diameter of 22~30mm of the light hole,
The standoff distance of light hole and the closing light lens is 30~75mm.
Preferably, the radius of curvature of the incidence surface of the first imaging len of the imaging lens arrangement is 59~65mm, is gone out
The radius of curvature of smooth surface is 29.5~33.0mm, and the distance with the light hole is 20~35mm；The imaging lens arrangement
The radius of curvature of second imaging len incidence surface is 120~123mm, and the radius of curvature of light-emitting surface is 47.0~49.5mm；It is described
The radius of curvature of the incidence surface of the third imaging len of imaging lens arrangement is 80~83mm, and the radius of curvature of light-emitting surface is 145
~150mm；First imaging len of the imaging lens arrangement, the second imaging len, third imaging len composition focusing microscope group.
Preferably, the radius of curvature of the incidence surface of the 4th imaging len of the imaging lens arrangement is 240~245mm,
The radius of curvature of light-emitting surface be 195~205mm, the radius of curvature of the incidence surface of the 5th imaging len of the imaging lens arrangement
For 500~575mm, the radius of curvature of light-emitting surface is 55~63mm, the 4th imaging len of the imaging lens arrangement and the 5th
Imaging len forms object lens fixation group.
The utility model includes a kind of optical system for LED stage lamp tool, and the LED lamp bead is in base plan
Regular hexagon array distribution makes the light that light source is sent out evenly, reduces light losing, promotes collection efficiency；Collector lens group
Part can carry the beam condenser that LED light source component is launched simultaneously into uniform beam, the uniformity of improvement single beam beam is collimated
Rise the hot spot uniformity；After uniform beam after the polymerization passes through closing light lens, multi-beam collimation light beam focuses on the coke of closing light lens
At point, light is projected after being imaged microscope group, obtains specular removal, the high clear pattern of optical quality.
Description of the drawings
The concrete structure of the utility model is described in detail below in conjunction with the accompanying drawings
Fig. 1 is a kind of structural scheme of mechanism of optical system for LED stage lamp tool of the utility model；
Fig. 2 is the structure diagram of the LED light source component of the utility model；
Fig. 3 is the arrangement schematic diagram of the first collector lens group of the utility model；
Fig. 4 is the arrangement schematic diagram of the second collector lens group of the utility model；
Wherein, 1- substrates, 2-LED lamp beads, 3- first collector lens groups, 4- the second collector lens groups, 5- closing light lens, 6-
Light hole, the first imaging lens of 7-, the second imaging lens of 8-, 9- third imaging lens, the 4th imaging lens of 10-, 11- the fifty percentth
As lens, the first lens of 12-, the second lens of 13-.
Specific embodiment
For the technology contents of the utility model, construction feature, the objects and the effects are described in detail, below in conjunction with implementation
Mode simultaneously coordinates attached drawing to be explained in detail.
Referring to FIG. 1 and FIG. 2, in the embodiment of the utility model, a kind of optical system for LED stage lamp tool is provided,
It includes the LED light source component set gradually from light direction, collector lens component, imaging lens arrangement；
The LED light source component includes substrate 1 and LED lamp bead 2, and the LED lamp bead 2 is on substrate 1 in regular hexagon point
Cloth；
The collector lens component includes the first collector lens group set gradually close to LED light source component, the second optically focused
Lens group and closing light lens 5；The first collector lens group includes the first lens 12, and the incidence surface of the first lens 12 is recessed ball
Face, light-emitting surface are convex spherical；The second collector lens group includes the second lens 13, and the incidence surface and light-emitting surface of the second lens are equal
For quadratic surface；The incidence surface of the closing light lens 5 and light-emitting surface are convex spherical；
First lens 12 enter light concave surface main function and are more effectively to collect the light that chip is sent out, while to chip surface layer
Play the role of certain protective role, 12 light-emitting surface of the first lens is set as spherical surface and is to increase lens strength to promote first thoroughly
The spotlight effect of mirror 12；Second lens 13 enter light and are set as aspherical with light-emitting surface, and effect is LED beam angle is further
It reduces, while also functions to the effect of optimization light refraction angle degree uniform light spots.
The imaging lens arrangement include the first imaging len 7 set gradually along LED light source component light extraction optical path direction,
Second imaging len 8, third imaging len 9, the 4th imaging len 10 and the 5th imaging len 11；First imaging len
7 be positive meniscus lens；Second imaging len 8 is diverging meniscus lens；The third imaging len 9 is biconvex spherical lens；
4th imaging len 10 is double-concave negative lens；5th imaging len 11 is biconvex positive lens.
In the technical program, LED lamp bead 2 is distributed on substrate 1 in regular hexagon, it is ensured that the heat dissipation of LED lamp bead 2,
It arranges simultaneously the LED lamp beads of most quantity, after the LED lamp beads 2 of more distributions is made to shine, the uniform surface that is closer in ideal
Light source reduces light losing to greatest extent, promotes collection efficiency, and the light beam that LED lamp bead 2 is sent out passes through first collector lens group
It after optically focused, again passes by the second collector lens group and carries out optically focused, obtain collimation uniform beam, which is passing through closing light lens 5
After closing light, the projection imaging after being imaged microscope group obtains specular removal, the high clear pattern of optical quality.
Embodiment one
Referring to FIG. 1 and FIG. 2, the quantity of the LED lamp bead 2 is no less than 18, and lamp is not placed in 1 center of substrate
Pearl.In the present embodiment, 1 center of substrate does not place LED lamp bead 2, can control the hot spot uniformity.Lamp bead quantity is more to mixed
Light is more advantageous, the light distribution non-uniform phenomenon of single LED light source, can be overlapped and is subject to by force with the optical interference of greater number light source
Weak complementation achievees the effect that enhance the even light of mixed light.It is minimum number needed for two hexagonal arrays to set 18 number amounts, less than 18
One to be that optical system power is difficult to do big, second is that will lead to the reduction of the hot spot uniformity.
Embodiment two
Referring to FIG. 1 and FIG. 2, the radius of curvature of 12 incidence surface of the first lens be 4.5~10.0mm, the curvature of light-emitting surface
Radius is 2~6mm, and the distance of first lens 12 and the LED lamp bead 2 is 0.05~0.30mm.In the present embodiment, first
The installation of the distance between lens 12 and LED lamp bead 2 is too low, is unfavorable for installation operation, apart from excessively high, is unfavorable for ray-collecting, shadow
Ring collection efficiency.Therefore can suitable distance be selected in the range of 0.05~0.30mm according to actual demand.First lens 12
The optically focused microscope group that an effective focal length EFFL value is 3.5mm, two simple lens radius of curvature models are collectively constituted with the second lens 13
The size determined depending on effective focal length is enclosed, why this programme optically focused microscope group effective focal length is set as 3.5mm, is needed light
Beam angle is low-angle light beam between 120 ° of LED light sources are gathered into 20 °~30 °, and the smaller ability to light-ray condensing of focal length is stronger.
Embodiment three
With reference to Fig. 1 and Fig. 3, the first collector lens group 3 includes multiple first lens 12；First lens 12 and institute
It states LED lamp bead 2 and corresponds arrangement.In the present embodiment, the quantity of the first lens 12 is determined by the quantity of LED lamp bead 2, each
LED lamp bead 2 is provided with corresponding first lens 12, the light beam that LED lamp bead 2 is sent out after the first lens 12 carry out optically focused,
Improve the uniformity of single beam.
Example IV
With reference to Fig. 1 and Fig. 4, the radius of curvature of 13 incidence surface of the second lens is 10~18mm, surface coefficients for 0.1~
0.5, the radius of curvature of light-emitting surface is 4.5~9.0mm, and surface coefficients are 0~-1, the second lens 13 and first lens 12
Spacing distance is 0.5~1.0mm.First lens 12 and the second lens 13 collectively constitute an effective focal length EFFL value as 3.5mm
Optically focused microscope group, two simple lens range of curvature radius determine the size depending on effective focal length, and this programme optically focused microscope group is effective
Why focal length is set as 3.5mm, is to need beam angle to be low-angle light between 120 ° of LED light sources are gathered into 20 °~30 °
Beam, the smaller ability to light-ray condensing dioptric of focal length are stronger.
Embodiment five
With reference to Fig. 1, the second collector lens group 4 includes multiple second lens 13；Second lens 13 and described the
One lens 12 are arranged in a one-to-one correspondence, and the spacing distance of the second lens 13 and first lens 12 is 0.5-1.0mm.The present embodiment
In, the quantity of the second lens 13 is equal with the quantity of the first lens 12 and is arranged in a one-to-one correspondence, after first collector lens optically focused
Light beam, again pass by the second collector lens optically focused, improve the uniformity of single beam, the second lens 13 are spaced with the first lens 12
Between distance is 0.5~1.0, spotlight effect is more preferably.Optical interval is also at interval between lens, according to lens principle Φ=
Φ1+Φ2-dΦ1Φ2(wherein Φ1And Φ2It is the focal power of two simple lenses respectively, d is exactly optical interval, and Φ is them
Total focal power, the inverse of total focal power is the total focal length EFFL of compound lens) optical interval size can be deduced to saturating from formula
The focal power and total focal length and beam size of microscope group can play adjustment effect.
Embodiment six
With reference to Fig. 1, the radius of curvature of 5 incidence surface of closing light lens is 38~55mm, and the radius of curvature of light-emitting surface is 140
~300mm, focal length are 45~75mm, and the spacing distance with the second collector lens group 4 is 5.5~12.0mm.The present embodiment
In, closing light lens 5 focus on the multi-beam collimation light after 4 optically focused of collector lens group the focal point of closing light lens 5, complete closing light,
Adjust closing light lens focal length, while adjust closing light distance size (closing light distance be equal to light beam focus on most bright spot it is saturating to closing light
The distance of mirror light extraction vertex of surface).
Embodiment seven
With reference to Fig. 1, the focal planes of the closing light lens 5 is provided with light hole 6, the light hole 6 a diameter of 22~
The standoff distance of 30mm, light hole 6 and the closing light lens 5 is 30~75mm.In the present embodiment, light hole 6 is used to be positioned to
As object, block except peripheral spurious rays to improve lens imaging quality and the hot spot uniformity, the determining and focus of light hole size
It is directly proportional to locate closing light spot size, but closing light hot spot can be less than and remove peripheral spurious rays (it is assumed that closing light maximum hot spot is Φ to keep off
31mm, then light hole can be chosen between 22~Φ of Φ 30mm), light hole distance determine depend on closing light focal length of lens size, lead to
The setting principle of unthreaded hole is must be in former and later two position sections of closing light lens image space focal plane (± 5.0mm), to obtain
Best light spot illumination and the uniformity and image quality.
Embodiment eight
Go out with reference to Fig. 1,59~65mm of radius of curvature of the incidence surface of the first imaging len 7 of the imaging lens arrangement
The radius of curvature of smooth surface is 29.5~33.0mm, and the distance with the light hole 6 is 20~35mm；The imaging lens arrangement
The radius of curvature of second imaging len, 8 incidence surface is 120~123mm, and the radius of curvature of light-emitting surface is 47.0~49.5mm；It is described
The radius of curvature of the incidence surface of the third imaging len 9 of imaging lens arrangement is 80~83mm, and the radius of curvature of light-emitting surface is 145
~150mm；The first imaging len 7, the second imaging len 8, the third imaging len 9 of the imaging lens arrangement form focusing lens
Group.
Focusing lens and object lens two are single-lens collectively constitutes a projection imaging optical system each of which radius of curvature R value
Setting be all realize crevice projection angle and image quality requirement under the premise of.And projection angle and imaging group focal length, eyeglass are bent
Rate r values and light hole size are close inseparable.It can be deduced by three lens cluster imaging formula：
Formula 1：(f ＇ are two imaging group total focal lengths, the half that h is light hole to f ＇=h/tanU, and U is field angle
The half of degree)；
Formula 2：f1' and f2' be focusing lens and the respective image space focal length wherein d of object lens respectively it is it
Between optical interval；
Formula 3：Focusing lens and each simple lens focal length calculation formula of object lensWherein n is optics glass
Glass material refractive index r1And r2It is the radius of curvature of single lens incidence surface and light-emitting surface respectively.
Following chart is thang-kng hole separation distance, four kinds of light hole size, the hot spot uniformity, light efficiency variable parameters integrate number
Table according to the experiment,
Experimental data is analyzed：It is compared from the practical light efficiency of light hole and the hot spot uniformity, it can be deduced that light hole is in Φ
Chosen between 26~Φ 30mm it is proper, closing light position 37mm~42mm distance ranges choose it is proper, from statistical number
According to can be seen that light hole in the two interval ranges, this system can be exported with specular removal and the hot spot uniformity, can expire completely
The requirement of the high-power stage lamp of foot.
Embodiment nine
With reference to Fig. 1, the radius of curvature of the incidence surface of the 4th imaging len 10 of the imaging lens arrangement for 240~
245mm, the radius of curvature of light-emitting surface is 195~205mm, the incidence surface of the 5th imaging len 11 of the imaging lens arrangement
Radius of curvature is 500~575mm, and the radius of curvature of light-emitting surface is 55~63mm, and the 4th imaging of the imaging lens arrangement is saturating
10 and the 5th imaging len 11 of mirror forms object lens fixation group.
In conclusion a kind of optical system for LED stage lamp tool provided by the utility model, LED lamp bead 2 is in positive six
On substrate 1,1 center of substrate does not place LED lamp bead 2 to side shape array distribution, and the meaning of regular hexagon distribution is having
In the planar substrates region of limit, while ensureing heat dissipation, the LED lamp bead 2 for most quantity of arranging makes the more LED lamp beads 2 being distributed
Closer to the uniform area light source in ideal after shining, while light losing is reduced to greatest extent to promote collection efficiency；Every
2 front of LED lamp bead is corresponding with single first lens 12 and carries out optically focused, and the first lens 12 carry out the light beam that LED lamp bead 2 is sent out
Optically focused, the second lens 13 obtain collimation uniform beam, closing light lens 5 to the optically focused again of the light beam by the first lens 12
Multi beam uniform beam being focused on completion closing light at the light hole 6 of image space focal plane, the light beam of synthesis is projected by imaging microscope group,
Obtain light efficiency height, the uniform clear image of hot spot.
The above description is only the embodiments of the present invention, and it does not limit the scope of the patent of the present invention, every
Equivalent structure or equivalent flow shift made based on the specification and figures of the utility model, is directly or indirectly used in
Other related technical areas are equally included in the patent within the scope of the utility model.
Claims (10)
1. a kind of optical system for LED stage lamp tool, it is characterised in that：It includes the LED set gradually from light direction
Light source assembly, collector lens component, imaging lens arrangement；
The LED light source component includes substrate and LED lamp bead, and the LED lamp bead is distributed on substrate in regular hexagon；
The collector lens component includes the first collector lens group set gradually close to LED light source component, the second collector lens
Group and closing light lens；The first collector lens group includes the first lens, and the incidence surface of the first lens is concave spherical surface, and light-emitting surface is
Convex spherical；The second collector lens group includes the second lens, and incidence surface and the light-emitting surface of the second lens are quadratic surface；Institute
It is convex spherical to state the incidence surface of closing light lens and light-emitting surface；
The imaging lens arrangement includes the first imaging len set gradually along LED light source component light extraction optical path direction, second
Imaging len, third imaging len, the 4th imaging len and the 5th imaging len；First imaging len is saturating for positive bent moon
Mirror；Second imaging len is diverging meniscus lens；The third imaging len is biconvex spherical lens；4th imaging is saturating
Mirror is double-concave negative lens；5th imaging len is biconvex positive lens.
2. a kind of optical system for LED stage lamp tool as described in claim 1, it is characterised in that：The LED lamp bead
Quantity is no less than 6, and lamp bead is not placed in the substrate center position.
3. a kind of optical system for LED stage lamp tool as claimed in claim 2, it is characterised in that：First lens
The radius of curvature of incidence surface is 4.5~10.0mm, and the radius of curvature of light-emitting surface is 2~6mm, first lens and the LED
The distance of lamp bead is 0.05~0.30mm.
4. a kind of optical system for LED stage lamp tool as claimed in claim 3, it is characterised in that：First optically focused
Lens group includes multiple first lens；First lens are corresponded with the LED lamp bead and are arranged.
5. a kind of optical system for LED stage lamp tool as claimed in claim 4, it is characterised in that：Second lens
The radius of curvature of incidence surface is 10~18mm, and surface coefficients are 0.1~0.5, and the radius of curvature of light-emitting surface is 4.5~9.0mm, bent
Face coefficient is 0~-1, and the spacing distance of the second lens and first lens is 0.5~1.0mm.
6. a kind of optical system for LED stage lamp tool as claimed in claim 5, it is characterised in that：Second optically focused
Lens group includes multiple second lens；Second lens are arranged in a one-to-one correspondence with first lens, the second lens with it is described
The spacing distance of first lens is 0.5~1.0mm.
7. a kind of optical system for LED stage lamp tool as claimed in claim 6, it is characterised in that：The closing light lens
The radius of curvature of incidence surface is 38~55mm, and the radius of curvature of light-emitting surface is 140~300mm, and focal length is 45~75mm, and described
The spacing distance of second collector lens group is 5.5~12.0mm.
8. a kind of optical system for LED stage lamp tool as claimed in claim 7, it is characterised in that：The closing light lens
Focal plane be provided with light hole, a diameter of 22~30mm of the light hole, light hole is separated by with the closing light lens
Distance is 30~75mm.
9. a kind of optical system for LED stage lamp tool as claimed in claim 8, it is characterised in that：The imaging len
The radius of curvature of the incidence surface of first imaging len of component is 59~65mm, the radius of curvature of light-emitting surface for 29.5~
33.0mm, the distance with the light hole are 20~35mm；The song of second imaging len incidence surface of the imaging lens arrangement
Rate radius is 120~123mm, and the radius of curvature of light-emitting surface is 47.0~49.5mm；The third imaging of the imaging lens arrangement
The radius of curvature of the incidence surface of lens is 80~83mm, and the radius of curvature of light-emitting surface is 145~150mm；The imaging lens group
First imaging len of part, the second imaging len, third imaging len composition focusing microscope group.
10. a kind of optical system for LED stage lamp tool as claimed in claim 9, it is characterised in that：The imaging len
The radius of curvature of the incidence surface of 4th imaging len of component is 240~245mm, the radius of curvature of light-emitting surface for 195~
205mm, the radius of curvature of the incidence surface of the 5th imaging len of the imaging lens arrangement are 500~575mm, the song of light-emitting surface
Rate radius is 55~63mm, the 4th imaging len of the imaging lens arrangement and the 5th imaging lens group into object lens fixation group.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721571944.XU CN207500839U (en) | 2017-11-21 | 2017-11-21 | A kind of optical system for LED stage lamp tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721571944.XU CN207500839U (en) | 2017-11-21 | 2017-11-21 | A kind of optical system for LED stage lamp tool |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207500839U true CN207500839U (en) | 2018-06-15 |
Family
ID=62505678
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721571944.XU Withdrawn - After Issue CN207500839U (en) | 2017-11-21 | 2017-11-21 | A kind of optical system for LED stage lamp tool |
Country Status (1)
| Country | Link |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107763450A (en) * | 2017-11-21 | 2018-03-06 | 广州达森灯光股份有限公司 | A kind of optical system for LED stage lamps |
-
2017
- 2017-11-21 CN CN201721571944.XU patent/CN207500839U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107763450A (en) * | 2017-11-21 | 2018-03-06 | 广州达森灯光股份有限公司 | A kind of optical system for LED stage lamps |
| CN107763450B (en) * | 2017-11-21 | 2024-01-16 | 广州达森灯光股份有限公司 | Optical system for LED stage lamp |
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